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Geology of Britannia Ridge, east section, southwest British Columbia McColl, Kathryn Margaret 1987

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GEOLOGY  OF B R I T A N N I A  RIDGE,  SOUTHWEST B R I T I S H  EAST  SECTION,  COLUMBIA  By KATHRYN B . S c ,  THESIS THE  The  MARGARET  McCOLL  U n i v e r s i t y of  SUBMITTED  Waterloo,  IN PARTIAL  REQUIREMENTS MASTER  FULFILLMENT  FOR THE DEGREE OF  1981  OF  SCIENCE  in THE  F A C U L T Y OF GRADUATE  (Department  We  accept to  THE  of  this  the  Geological  thesis  required  UNIVERSITY  as  Sciences)  conforming  standard  OF B R I T I S H  October  STUDIES  COLUMBIA  1987  (t) K a t h r y n M a r g a r e t  McColl,  1987  OF  In  presenting  degree  this  at the  thesis  in  University of  freely available for reference copying  of  department publication  this or of  partial  fulfilment  British Columbia, and study.  of  his  or  her  representatives.  may be It  this thesis for financial gain shall not  < £ £ P l PC  K A t-  The University of British Columbia 1956 Main Mall Vancouver, Canada V6T 1Y3  DE-6(3/81)  that the  I further agree  permission.  Department of  requirements  I agree  thesis for scholarly purposes by  the  5C|g/\JdJg-^  is  an  advanced  Library shall make it  that permission for extensive granted  by the  understood be  for  that  allowed without  head  of  my  copying  or  my written  Page  II.  ABSTRACT  A to  stratigraphic  the  Late  a l . i 1986)  is  Ridge  and  the  three  packages,  continuous to  sequence  by  a  felsic  by  a  thick  ash  to  related  to  felsic  rock  of  dome  analyses  Alteration,  rocks  2 and  a  massive are  and  chert  crystal  from  eastern  3 dip 1 is  to  3 is  gradational  upper  occur  lithic  occur  tuff  represent  by 2  and  From  face a  is  both  mafic dominated-  blanketed  characterized to  a  two major  contacts  horizons  defines  and  upwards at  Britannia  volcanics.  Package  Package  of  that  characterized  basin,  et  abandoned  mapping  moderately  domes.  assigned  (Heah  the  section  felsic  sedimentary  unit.  tuffs  lower with  units  v o l c a n i c sequences,  rhyolite  flow  flow  the  equivalents  2 where  by  Gambier Group  mainly mafic  1,  volcanic rocks  Geological  Developed orebodies  associated  accompanying  the  Package  pyroclastic and  as  complex and  sheared  suite.  Cretaceous  along  of  packages  intruded  close  Whole  altered  correlates  interpreted  unit.  Sulphides  strata  for  Furry Creek v a l l e y .  dome  lavas  are  that  southwest.  flow  that  with  south,  argillite  Early  succession  consistently  felsic  -  proposed  Mine  north  framework  Jurassic  Britannia  a  i i  of  by  thick horizons  package  2.  within  altered  felsic  breccia  complexes.  define  an  altered  attributed  to  hydrothermal  sulphides,  MgO-rich,  is  most  CaO-poor and  calc-alkaline volcanic  intense  solutions in  enriched  packages or  1 -and  depleted  in  Page  alkalis and  compared t o normal s u b a l k a l i n e  from l a t e r  crosscutting  values t e n t a t i v e l y define 167  +_ 37 Ma  3.2  Ma  and  Intrusions  f o r the 81.4  dykes are  Rocks i n package 3  r e l a t i v e l y unaltered.  Rb-S  a J u r a s s i c t o E a r l y C r e t a c e o u s age  altered volcanic  +_ 3 Ma  rocks.  are  s u i t e . K-Ar  i n t e r p r e t e d as  s u r r o u n d i n g the  volcanic  iii  dates of  r e s e t by  pendant and  a  Coast  of  90.5 Plutonic  later  d e f o r m a t i o n a l o r undocumented i n t r u s i v e e v e n t .  Massive sulphides B r i t a n n i a Ridge are deposits the  described  associated  with f e l s i c  volcanic  s i m i l a r to v o l c a n o g e n i c massive i n the  rocks sulphide  Canadian Archean greenstone b e l t s  Miocene Kuroko d e p o s i t s  of  Japan.  on  and  jvjc  III.  j  TABLE  OF  ,  Page  iv  CONTENTS Page  I.  COPY AND R E F E R E N C E P E R M I S S I O N  II.  i  ABSTRACT  III.  i i  T A B L E OF CONTENTS  IV.  LIST  OF T A B L E S  V.  LIST  OF F I G U R E S  iv x x i  1.  INTRODUCTION  1  1.1  OBJECTIVE  AND A P P R O A C H  1  1.2  LOCATION,  SIGNIFICANCE  1.2.1  Location  1.2.2  Significance  1.2.3  Geological  AND H I S T O R Y  OF A R E A  2 2  of  the  History  Area  4 5  1 .3  ACKNOWLEDGEMENTS  8  2.  R E G I O N A L GEOLOGY  9  2.1  INTRODUCTION  9  2.2  GEOLOGY  11  2.2.1  Introduction  11  2.2.2  Stratified  13  2.2.3  Gambier  Rocks  Group  15  Page  v  Page 2.2.4  3.  Britannia  Pendant  19  1.  Introduction  19  2.  Lithology  19  3.  Structure,  20  4.  Age  22  5.  Economic  6.  History  7.  Correlation  LOCAL  Mineralization of  22  Mapping with  23  the  Gambler  Group  25  GEOLOGY  27  3.1  INTRODUCTION  27  3.2  PACKAGE  1,  "FOOTWALL"  SEQUENCE  32  3.2.1  Introduction  32  3.2.2  Unit  32  3.2.3 3.3 3.3.1  Descriptions  1.  Argillite,  Unit  2.  Andesite  Basalt,  3.  Rhyolite,  4.  White  5.  Felsic  6.  Mafic  7.  Altered  -  Unit  1  32 Unit  Lapilli  35 Unit  Ash Tuff, Block  Basalt,  Tuff,  Unit  Summary  PACKAGE  2,  33  3  Block Breccia, Crystal  2  7  4 Unit Unit  37 5  38 6  40 43 45  "MINE"  Introduction  SEQUENCE  47 47  Page  vi  Page  3.3.2  Unit  Descriptions  1..Argillite,  Ash  Tuff,  2.  Dacite,  Unit  3.  Crystal  Lithic  4.  Ash  5.  Quartz-Sericite  Tuff,  3.3.3  Summary  3.3.4  Contact  3.4  48  PACKAGE  Unit  8  48  9  49 Tuff,  Unit  A r g i l l i t e ,  10  Chert,  Schist  and  53 Unit  11  Sulphides,  56 Unit  12  57 59:  between  3,  Packages  "HANGINGWALL"  1 and  2  SEQUENCE  60 64  3.4.1  Introduction  64  3.4.2  Unit  65  Descriptions  1.  Crystal  2.  Rhyodacite,  3.  Ash  4.  A r g i l l i t e ,  5.  Andesite  Tuff,  3.4.3  Summary  3.4.4  Contact  3.5  Lithic  INTRUSIVE  Tuff,  Unit  Breccia  13  65  14  A r g i l l i t e , Unit  Unit  66 Unit  15  68  16 Tuff,  69 Unit  17  70 70  between  Packages  2 and  ROCKS  3  71 75  3.5.1  Introduction  75  3.5.2  Dykes  Intrusions  77  Unit  77  and  1.  Dacite,  2.  Andesite  and  18 Diorite,  Unit  19  78  Page v i  Page  3.5.3 I n t r u s i o n s o f t h e C o a s t P l u t o n i c Complex 1. G r a n o d i o r i t e ,  Quartz D i o r i t e ,  Unit  20  79 79  4. WHOLE ROCK GEOCHEMISTRY  81  4.1 INTRODUCTION  81  4.2 GROSS CHEMICAL CHARACTERISTICS  84  4.2.1 Rock Types  84  4.2.2 Packages  85  4.3 ALTERATION  90  4.3.1 U n a l t e r e d  versus  Altered  91  4.3.2 A l k a l i  93  4.3.3 A l t e r a t i o n I n v o l v i n g CaO, MgO and S i 0 4.3.4 H y d r o t h e r m a l A l t e r a t i o n R e l a t e d  2  t o Massive Sulphides  98 101  4.4 MAGMATIC CHARACTERISTICS  102  4.4.1 I n t r o d u c t i o n  102  4.4.2 A l k a l i n i t y  103  4.4.3 Fe - E n r i c h m e n t T r e n d  104  4.5 VOLCANIC ENVIRONMENT  107  5. GEOCHRONOMETRY  110  5.1 INTRODUCTION  110  5.2 K/Ar DATING  1-14  5.3 Rb/Sr DATING  115  Page  viii  Page 6.  INTERPRETATION AND CONCLUSIONS  121  6.1 INTRODUCTION  121  6.2 LOCAL GEOLOGY, SUMMARY AND DISCUSSION  122  6.2.1  122  Introduction  6.2.2 Packages  123  1. Package  1  123  2. Package  2  124  3. Package  3  126  6.2.3 S t r u c t u r e  127  1. B r i t a n n i a Shear Zone  128  2. M o n o c l i n e  130  3. F a u l t s  132  6.3 VOLCANIC HISTORY 6.3.1  Introduction  .133 133  6.3.2 V o l c a n i c A c t i v i t y  136  6.3.3 S u l p h i d e s  139  6.4 CONCLUSIONS AND RECOMMENDATIONS  140  6.4.1  140  Stratigraphy  and S t r u c t u r e  6.4.2 V o l c a n i c Environment  141  6.4.3 Age and C o r r e l a t i o n  143  6.4.4 T e c t o n i c  144  Environment  7. SELECTED BIBLIOGRAPHY  147  Page i x  Page  APPENDICES  163  A.  ROCK CHIP SAMPLES  163  B.  WHOLE ROCK AND TRACE ELEMENT CHEMICAL ANALYSES  200  B.1 Whole Rock A n a l y s e s  200  B. 2 T r a c e Element  201  C.  Analyses  ANALYTICAL PROCEDURES AND GEOCHEMICAL PREPARATION  C.1 T r a c e Element  Determinations  C.2 K-Ar A n a l y t i c a l C.3 Rb-Sr A n a l y t i c a l  Techniques Techniques  203 203 206 206  Page  L I S T OF  x  TABLES Page  1.1  H i s t o r y o f g e o l o g i c a l mapping w i t h i n  2.1  F o r m a t i o n s i n the  3.1  Major f e a t u r e s Ridge  4.1  6  of B r i t a n n i a R i d g e .  d e f i n i n g packages i n the  Major elements i n s e l e c t e d r o c k east  12  Britannia  28  samples  s e c t i o n of B r i t a n n i a R i d g e .  Average major element v a l u e s f o r b a s a l t , rhyodacite data  from the  east  5.1  K-Ar  5.2  Rb-Sr a n a l y s e s of v o l c a n i c  5.3  Calculated volcanic  A.1  092G.  area.  from the 4.2  region  NTS  for volcanic  dacite  and  s e c t i o n of B r i t a n n i a Ridge.  r o c k s from B r i t a n n i a R i d g e .  Rb-Sr i s o c h r o n  dates  f o r the  Britannia  88 111  r o c k s from B r i t a n n i a R i d g e .  112  Ridge  suite.  113  Index f o r l i s t i n g s of r o c k c h i p from the  82  samples  (Tables  A.4  B r i t a n n i a Ridge area.  and  A.5) 166  A.2  Codes f o r r o c k t y p e s  i n T a b l e s A.4  and  A.5.  A.3  Codes f o r c o l o u r s  A.4  Listing  of  1982  rock chip  samples.  169  A. 5 L i s t i n g  of  1983  rock chip  samples.  194  of r o c k s i n T a b l e s A.4  B. 1 T a b l e of e s t i m a t e d t h r e s h o l d s elements i n samples from the  by  and  167 A.5.  r o c k type f o r  168  trace  B r i t a n n i a Ridge area.  202  Page x i  LIST OF FIGURES Page 1.1  L o c a t i o n and R e g i o n a l Geology.  2.1  Comparative  3  Stratigraphic Sections,  proposed by v a r i o u s workers, Gambier Group w i t h i n  16  f o r the  the B r i t a n n i a  Pendant.  3.1  S i m p l i f i e d Geology o f the B r i t a n n i a Ridge Area.  3.2  G e o l o g i c Map w i t h C r o s s - s e c t i o n s of the e a s t s e c t i o n o f B r i t a n n i a Ridge  4.1  28  (1 : 1 0,000).  ^fweKul"]  P l o t o f % FeO /MgO v e r s u s % Si02 data from the e a s t s e c t i o n T  of B r i t a n n i a Ridge. 4.2  86  P l o t o f % MgO v e r s u s % CaO data from the e a s t s e c t i o n o f B r i t a n n i a Ridge.  4.3  92  P l o t of % Na 0 + % K 0 versus % S i 0 2  2  2  data from the e a s t  s e c t i o n o f B r i t a n n i a Ridge. 4.4  P l o t of % K 0 v e r s u s % S i 0 2  Britannia 4.5  94 data from the e a s t s e c t i o n o f  2  Ridge.  96  P l o t of % Na 0 v e r s u s % S i 0 2  2  data from the e a s t s e c t i o n o f  B r i t a n n i a Ridge. 4.6  97  P l o t o f % CaO v e r s u s % S i 0  data from the e a s t s e c t i o n o f  2  B r i t a n n i a Ridge. 4.7  99  P l o t of % MgO v e r s u s % S i 0  data from the e a s t s e c t i o n o f  2  B r i t a n n i a Ridge. 4.8  P l o t of % F e O Britannia  T  100  versus % S i 0  Ridge.  t  2  data from the e a s t s e c t i o n o f 105  Page  xii  Page  4.9  P l o t o f % A I 2 O 3 v e r s u s % Si02 d a t a from the e a s t s e c t i o n  of  B r i t a n n i a Ridge. 4.10  P l o t of % T i G ^ v e r s u s % FeOrp d a t a from the e a s t s e c t i o n o f Britannia  5.1  106  Ridge.  108  Rubidium-strontium  i s o t o p e p l o t f o r samples  from  the  B r i t a n n i a Ridge a r e a . 6.1  C o r r e l a t i o n of u n i t s and  117 i n t e r p r e t a t i o n of the  volcanic  h i s t o r y o f the e a s t s e c t i o n o f B r i t a n n i a R i d g e . A.1  A.2  F i e l d Base Map  of the e a s t s e c t i o n o f  Britannia  Ridge,  locations  ( 1 : 5,000 ).  i n c l u d i n g o u t c r o p and  T e r m i n o l o g y and nomenclature rocks.  135  sample k<P&&&@£*i'  used t o d e s c r i b e p y r o c l a s t i c 165  Page 1  1 . INTRODUCTION  1.1 OBJECTIVE AND  The  Britannia  APPROACH  Mine, which c l o s e d  i n 1974 a f t e r 69 y e a r s o f  p r o d u c t i o n , has been t h e f o c u s o f d e t a i l e d g e o l o g i c a l  mapping i n  coastal  century.  southwestern B r i t i s h  Conflicting  interpretations  formation of the B r i t a n n i a main o b j e c t i v e  at Britannia  o r e b o d i e s remain c o n t r o v e r s i a l .  stratigraphy,  to f a c i l i t a t e  especially  30 km n o r t h o f Vancouver, d e f i n e s  Mesozoic c a l c - a l k a l i n e v o l c a n i c  and  (Roddick e t a_l. , 1 979).  3 d i p m o d e r a t e l y and f a c e  Relationships thick and  orebodies, extrusive and  rhyodacite  within  t o t h e Gambier  southwest.  Package 1 c o n s i s t s  interbedded  of a  submarine a s h f l o w s  Package 2, h o s t t o t h e B r i t a n n i a altered  dome complex w i t h a s s o c i a t e d  sedimentary rocks.  ( F i g s . 1.1 and  t h r e e packages  consistently  i s dominated by a v a r i a b l y dacite  Ridge  From n o r t h t o s o u t h packages 1, 2  flows with  l o c a l i z e d r h y o l i t e domes.  Britannia  to the east.  rocks assigned  among them a r e complex.  sequence o f b a s a l t  mineralized  c o r r e l a t i o n between  Mapping i n t h e v i c i n i t y o f B r i t a n n i a  Group  The  i s t o propose a p r a c t i c a l d e s c r i p t i v e  Mine a r e a and t h e Vancouver Watershed r e g i o n  3.2),  the l a s t  o f s t r a t i g r a p h i c r e l a t i o n s h i p s and t h e  of t h i s study  framework f o r t h e v o l c a n i c units,  Columbia d u r i n g  intrusive breccia,  pyroclastic  Package 3, t h e l e a s t a l t e r e d , c o n s i s t s o f  f l o w s , welded a s h f l o w s , and s e d i m e n t a r y  rocks.  Page 2  Sulphides a s s o c i a t e d with q u a r t z - s e r i c i t e related  to f e l s i c  (chlorite)  schist  v o l c a n i s m o c c u r a t the c o n t a c t s between  and  the  packages.  T h i s work, based seasons,  was  exposure and  limited  on g e o l o g i c a l mapping over  three  by d i f f i c u l t i e s  scarce  extreme topography  paleovolcanic terrane. by p e t r o g r a p h y , K-Ar  dating.  scope of t h i s  1.2  G e o l o g i c a l i n t e r p r e t a t i o n s are  D e t a i l e d s t r u c t u r a l and  supported  p r e l i m i n a r y Rb-Sr  chemical  and  s t u d i e s , beyond  the  s t u d y , a r e recommended t o f u r t h e r d e f i n e the and  p o t e n t i a l of B r i t a n n i a - t y p e m a s s i v e  i n the F u r r y Creek  valley.  LOCATION, SIGNIFICANCE AND  1.2.1  outcrop  superimposed on a complex  whole r o c k c h e m i s t r y and  stratigraphy, alteration sulphides  imposed by  field  HISTORY OF  THE  AREA  Location  This  study  Britannia 1.1).  The  Britannia extends  c o v e r s a map  Ridge, area  area  approximately  6.5  10 km  km  t o the west, and  3.3  km  c l a i m s west o f and  the  F u r r y Creek t o the s o u t h ; i t  including  by Copper Beach E s t a t e s L t d . and  along  Creek t o the n o r t h ,  e a s t t o the Vancouver Watershed boundary.  straddles  centered  e a s t of B r i t a n n i a Beach ( F i g .  i s bounded by B r i t a n n i a  open p i t s  by  The  map  the o l d mine p i t s ,  the c l a i m s e a s t of the  area owned  above  by  Page  Kllomatraa  COVER UNITS Alluvial. Glacial  Recent and Tertiary  PLUTONIC ROCKS |+ \' j  Granodiorite, Quartz Dlorita  I^^J  Dlorita. Migmatite Complex  <  l  Cretaceoua  STRATIFIED ROCKS j  J  HH  Qambiar Group  Jurassic-Cretaceoua  Bowan Island Group  Triasaic  V/'.'. //'//X Twin Island  FIGURE  1.1  Qroup  Pennsylvanian-Permian  L o c a t i o n and R e g i o n a l G e o l o g y ( f r o m R o d d i c k e t a l . , 1975) a r o u n d t h e B r i t a n n i a R i d g e a r e a , s o u t h w e s t e r n B r i t i s h Columbia. Wavy l i n e d e f i n e s " s h e a r z o n e s " ; d o t s l o c a t e m i n e r a l o c c u r r e n c e s ; t r i a n g l e s mark l o c a l i t i e s r e f e r r e d to i n t e x t . Formations are d e s c r i b e d i n T a b l e 2.1.  3  Page 4  ground t o the Vancouver Watershed t h a t were h e l d by E x p l o r a t i o n Canada L i m i t e d , but Ltd.,  are  now  owned by  Fleck  d r i v e v e h i c l e along  a p r i v a t e l o g g i n g road  v a l l e y , or from the n o r t h  by  range from 700 steep  impassable c l i f f s . roads,  on  with  The  the F u r r y  Creek  through  the  m on  B r i t a n n i a Ridge.  O u t c r o p i s s c a r c e , exposed m o s t l y by  stream beds o r a l o n g  ridges.  However, the  are  often  logging  south-facing  been c l e a r c u t and  provides  exposures.  mapping season i s s h o r t .  O c t o b e r to June, and north-facing  slopes.  downpours i n f a l l  may  the e n t i r e a r e a r i d g e tops  R a i n y weather i s most t y p i c a l . l o g g i n g roads,  from  and  Heavy  requiring  seasonal  routes.  S i g n i f i c a n c e of the  Most m i n e r a l  Snow c o v e r s  remain y e a r - r o u n d on  o f t e n wash out  maintenance.of access  in  four-wheel  dense c o a s t a l v e g e t a t i o n ,  s l o p e of the F u r r y Creek v a l l e y has excellent  by  Topography i s extreme; a l t i t u d e s  m a t F u r r y Creek t o 1,600  slopes, covered  up  l o c k e d g r a v e l road  abandoned Mount Shear t o w n s i t e .  1.2.2  Resources  Vancouver.  B r i t a n n i a R i d g e i s a c c e s s i b l e from Highway #99  The  Anaconda  Area  occurrences  in southwestern.British  Columbia  are  pendants of M e s o z o i c v o l c a n i c r o c k w i t h i n the C o a s t P l u t o n i c  Complex.  The  l a r g e s t and  most s i g n i f i c a n t  of t h e s e ,  the B r i t a n n i a  Page. 5  pendant,  h o s t s t h e B r i t a n n i a Mine t h a t was  production  f o r t h e 69 y e a r s from  B r i t a n n i a Mine was Commonwealth. million  D u r i n g i t s o p e r a t i o n about  0.7  a l . , 1980).  ppm  The  Au  (0.02  o v e r 4 km  The main h a u l a g e  level  Beach  a t 1,700  m  now  pendants  interest  to mineral e x p l o r a t i o n  abundant  volcanic  Geological  little  southwestern Vancouver. in  and  7 ppm  Ag  (55  (0.2  (Payne  deep,  oz et  mining was workings.  from a  at Cyrtina  portal  Creek i n  flooded.  sulphide theory,  Columbia  companies.  a r e o f renewed  Most a r e a s w i t h  rocks are staked; a c t i v i t y  i s concentrated  showings.  History  has been p u b l i s h e d  coastal T a b l e 1.1  the rugged  tonnes  d i s t a n c e o f a p p r o x i m a t e l y 12  i n southwestern B r i t i s h  o l d p r o s p e c t s and  British  underground  the a c c e p t a n c e o f v o l c a n o g e n i c m a s s i v e  volcanic  thirties,  seventeen d i s t i n c t  to the F a i r w e s t workings  are closed  Very  Zn,  (4,100 f t ) e x t e n d s  km.  1.2.3  0.65%  o f p i t s and  ( F i g . 3.2)--a  around  50 m i l l i o n  l o n g and more t h a n 2 km  the F u r r y Creek v a l l e y Most w o r k i n g s  In t h e  oz Au/ton) were p r o d u c e d  d e v e l o p e d by an e x t e n s i v e system  near B r i t a n n i a  Cu,  ore, contained within  in a belt  With  t o 1974.  c o p p e r p r o d u c e r i n the  t o n s ) o f o r e g r a d i n g 1.1%  Ag/ton) and  lenses  the l a r g e s t  1905  i n almost continuous  terrain  British  Columbia,  is a brief around  recently  on v o l c a n i c  despite  rocks of  p r o x i m i t y to  chronology of g e o l o g i c a l  Howe Sound.  R e p o r t s from  the  mapping early  H i s t o r y o f g e o l o g i c a l mapping r e l e v a n t t o t h e g e o l o g y a t B r i t a n n i a ( V a n c o u v e r This t a b l e d o e s n o t i n c l u d e u n p u b l i s h e d company r e p o r t s a n d t h e s e s . AUTHOR REFERENCE  AREA REPORTED  Map S h e e t  092G).  NOTES  Heah e t a l . (1986>  Sky P i l o t M o u n t a i n i n t h e Britannia - Indian River pendant  Goat  P a y n e e t a 1. (1980)  Britannia  Mine  Reinterpretation of B r i t a n n i a deposits as volcanogenic i n o r i g i n , and c o m p a r i s o n w i t h Kuroko d e p o s i t s  Sutherland-Browm < 1970 )  Britannia  Mine  Rodd i c k I 196$)  V a n c o u v e r N o r t h, C o q u I t l a m and P i t t L a k e map a r e a s  S p e c i a l emphasis on the e v o l u t i o n of p l u t o n i c Descr i p t ions of volcanosedirnentary pendants  bos t o c k I 1963 J  Squamish  Regional  Mathews ( 1 9 5 8 , 1972)  Mount G a r i b a l d i a n d t h e Vancouver area  Examination geology  Armst r o n g (1953)  Vancouver  Proposed t h e term Gambier Croup; c o r r e l a t e d t h e B r i t a n n i a f o r m a t i o n w i t h t h e Upper Gambier G r o u p a n d t h e Goat M o u n t a i n . f o r m a t i o n w i t h t h e Lower G a m b i e r G r o u p  Britannia  1rvine (1946,  map  Mountain  Mine C l o s e s  Formation,  Gambier  **************  •*  Suggested p o s s i b i l i t y that volcanogenic i n o r i g i n  area  North  map  area  Group  geological  ********  the deposits  map GSC  might  be  rocks.  42-1963  of the G a r i b a l d i  volcanics  and  surrounding  Br l t a n n i a M i n e  Structure  Southern coastal British Co 1 umb i a , I K M r Vdiicou v e r  Description  Britannia  Mine  Outlined ore  James ( 1929 »  Britannia pendant  - Indian  Kiver  Described proposed position  Schof i e I d ( 1 9 1 8 , 1926)  Br i t a n n i a pendant  - 1 [id i an  Kivtf  Divided t h e B r i t a n n i a group i n t o the B r i t a n n i a formation and t h e u n d e r l y i n g , o l d e r Goat Mountain f o r m a t i o n  Burwash I 1918 )  Vancouver  and  Catnse 11 ( 1918 >  Squamish  McConnel1 ( 1914 >  Texada I s l a n d , B r i t a n n i a Indian River pendant  Daley ( 1912 )  North American C o r d i l l e r a along the 49th p a r a l l e l  Reconnaisance  LeRoy ( 1 9 0 6 , 1906)  Souttiern c o a s t a l Columbia  P r o p o s e d t h e name B r i t a n n i a Britannia ore deposits  Bauerman ( 1885 )  Vancouver  Phemi s t e r (1945) t'hbutt ( 19 3 5,  of orebodies  described  1948)  1 * 4 21 (  vicinity  and L i l l o o e t  o f t h e Coast  ***• * • « • * * • • • • * * * * * • * • • • • * • * and B r i t a n n i a  areas  Britannnia  Mine Opens  of  geology  and Daisy  Reconnaisance geology with Britannia ore deposits  British  to the deposition  t h e B r i t a n n i a g r o u p and t h e B r i t a n n i a Anticline; the older B r i t a n n i a formation i s thrust i n t o i t s o v e r l y i n g ttie C o a t M o u n t a i n f o r m a t i o n  D e s c r i b e s t h e Roy, B e l l e , Britanniapendant  -  batholith  the r e l a t i o n s h i p of structure  Reconnaissance  areas  Range  i nthe  descriptions  of the  geology  ••*****»*•*  Reconnaisance  short  prospects  geology  group and b r i e f l y  described  the  Page 7  decades of  the  c e n t u r y c e n t e r e d around B r i t a n n i a  notes published Britannia  by  the  i n t o the  Britannia  Britannia  stratigraphic  company r e p o r t s was  intrusions  and  Schofield  remains c o n t r o v e r s i a l .  believed i n t o the  little  Armstrong Geological his  t o as  Britannia  or no  regional  work was  (1953), i n r e g i o n a l  sixties,  geological  Plutonic  Complex  area  mine.  Columbia reports  Very  work d u r i n g the  the  fifties  the  the  the  group  into  in  In  granites  early  by  f o r a l l Late  of  the the  seventies  Mine c l o s e d  i n 1974.before t h e o r i e s  Coast  interest  on  v o l c a n o g e n i c m a s s i v e s u l p h i d e s , were w i d e l y a c c e p t e d most r e c e n t  based on  of  dwindled.  Britannia  The  to  little  Britannia  i n use  c o n c e n t r a t e d on By  Cu-Zn  done.  (Heah e t a l . , 1986).  (Roddick, 1965).  by  The  related  E a r l y Cretaceous c a l c - a l k a l i n e v o l c a n i c s  southwestern B r i t i s h  i n the  disputed  immediate v i c i n i t y  Survey of Canada, i n c o r p o r a t e d  and  the  group.  Gambier Group--a c a t c h a l l term s t i l l  Jurassic  The  a replacement deposit  stratified  group,  Numerous u n p u b l i s h e d  d e t a i l e d g e o l o g y of  t o be  the  stratified  Britannia  Goat Mountain f o r m a t i o n s .  company mapping extended beyond the mine, and  (1918) d i v i d e d  pendant, r e f e r r e d  describe  Geological  o p e n i n g of  r e l a t i o n s h i p of. t h e s e f o r m a t i o n s was  (1929) and  deposit  (1885) p r e c e d e d the  Cu-Zn Mine i n 1905.  r o c k s of  James  Bauerman  Mine.  publication  work a t the  on  time the  the  area  i n Canada.  (Payne et_ a_l. , 1 980),  mine c l o s e d ,  convincingly  presents a  Page 8  r e i n t e r p r e t a t i o n of the B r i t a n n i a mine as a Kuroko-type vplcanogenic deposit.  A volcanogenic  now g e n e r a l l y accepted  f o r many massive s u l p h i d e d e p o s i t s w i t h i n  Gambier Group rocks  1.3  (e.g. M i l l e r ;  i n t e r p r e t a t i o n of o r i g i n i s  1973; Clendenan, 1978).  ACKNOWLEDGEMENTS  T h i s p r o j e c t was c o n c e i v e d by and c a r r i e d out under the s u p e r v i s i o n of C.I. Godwin, The U n i v e r s i t y of B r i t i s h  Columbia,  and L. R i c c i o , p r e v i o u s l y with Anaconda E x p l o r a t i o n Canada Limited.  Anaconda p r o v i d e d funding f o r f i e l d  c h e m i s t r y , and r e s e a r c h d u r i n g 1982 and 1983. p r o j e c t was completed  support,  analytical  Fieldwork  f o r the  i n 1984 with the c o o p e r a t i o n of H.L. Gibson  and C o r p o r a t i o n F a l c o n b r i d g e Copper L t d .  NSERC p r o v i d e d p e r s o n a l  support d u r i n g 1983, and p r o v i d e d funding by grants t o C.I. Godwin.  Copper Beach E s t a t e s allowed access to the B r i t a n n i a mine  area.  I thank T r i s h Webb f o r her competent a s s i s t a n c e , companionship and  e x c e l l e n t cooking  understanding  t h a t made f i e l d  work a p l e a s u r e .  of the rocks b e n e f i t e d from d i s c u s s i o n s i n the f i e l d  with H. Gibson.  I am g r a t e f u l to A. de Rosen-Spence f o r a s s i s t i n g  me i n the use of her v a r i a t i o n diagrams. to  My  my mother, without  whose support  would not have been p o s s i b l e .  S p e c i a l thanks  the completion  are due  of t h i s  project  Page 9  2.  2.1  INTRODUCTION  The  southwestern  coast of B r i t i s h  Coast P l u t o n i c Complex. and  REGIONAL GEOLOGY  Columbia  i s u n d e r l a i n by t h e  T h i s complex i s a broad b e l t o f g r a n i t o i d  v a r i a b l y metamorphosed r o c k s , which extends  a l o n g the c o a s t from Vancouver, i n t o t h e Yukon T e r r i t o r y .  through  "pendants"--separate plutonic British  rocks. Columbia,  variably  r o c k s o c c u r as'  bodies of s t r a t i f i e d  r o c k , surrounded by  The l a r g e s t o f t h e s e "pendants" the B r i t a n n i a  1,800 km  s o u t h e a s t e r n A l a s k a , and  W i t h i n t h i s complex,  metamorphosed v o l c a n i c and s e d i m e n t a r y  f o r about  i n southwestern  - I n d i a n R i v e r pendant,  consists  of c a l c - a l k a l i n e v o l c a n i c r o c k s a s s i g n e d t o the L a t e J u r a s s i c Early  C r e t a c e o u s Gambier Group (Heah et. a l . , 1 986 ).  The (1979),  Coast P l u t o n i c Complex, d e s c r i b e d by Monger and P r i c e i s a s e r i e s of ncrthwest-trending allochthonous terranes  a c c r e t e d t o North America plutons.  Southwestern  i n t h e Mesozoic  mainland  British  I s l a n d a r e u n d e r l a i n by W r a n g e l l i a . suggested  Columbia,  Cretaceous.  and Vancouver  Woodsworth and T i p p e r (1980)  t h a t v o l c a n i s m m i g r a t e d eastward  t o t h e s o u t h e r n Coast Mountains  and c u t by C r e t a c e o u s  from Vancouver  Island  d u r i n g t h e J u r a s s i c and  The a c c r e t i o n o f W r a n g e l l i a t o s o u t h e r n  British  Page  Columbia has  been s e t between E a r l y J u r a s s i c and  (Woodsworth and  Detailed  t i m i n g of events  t h a t formed the Coast P l u t o n i c  The  ages of .most s t r a t i f i e d  unknown because f o s s i l s a r e s c a r c e and between i s o l a t e d  stratigraphic  pendants i s - e x t r e m e l y d i f f i c u l t .  d a t e s on p l u t o n i c r o c k s a r e v a r i a b l y  emplacement or time of major  h i s t o r y o f , and  a potential  The  r e g i o n has  and  consequently  Ag and  Au.  occurrences metallogenic pendant  interpreted  as time  of  i s a region with a  i d e n t i f i e d only  Most pendant s t r a t a and  These o c c u r r e n c e s  by  adjacent  M i n e r a l o c c u r r e n c e s , a number of  are d e s c r i b e d (MINFILE,  Petroleum  B.C.  Resources) as: v e i n ,  v o l c a n o g e n i c d e p o s i t s a s s o c i a t e d w i t h Cu,  Cu-Mo porphyry  rocks.  Radiometric  mines, a r e c o n c e n t r a t e d w i t h i n the  M i n i s t r y of Energy, Mines and s k a r n and  correlation  s i n c e the l a t e e i g h t e e n hundred's,  p l u t o n i c r o c k s have been s t a k e d .  shear,  Columbia  many o l d showings can be  abandoned a d i t s o r w o r k i n g s .  pendant r o c k s .  are  f o r , economic m i n e r a l development.  been p r o s p e c t e d  which have been p r o d u c i n g  rocks  deformation.  Southwestern c o a s t a l B r i t i s h  plutonic  mid-Cretaceous  T i p p e r , 1980).  Complex are p o o r l y known.  K-Ar  10  Zn,  Pb,  d e p o s i t s are d e s c r i b e d w i t h i n some  Three p r i n c i p l e c o n c e n t r a t i o n s of m i n e r a l  i n the Vancouver - Hope a r e a t h a t were o u t l i n e d study  ( D i t s o n , 1978)  ( B r i t a n n i a Mines),  by a  were: the B r i t a n n i a - I n d i a n R i v e r  the C a l l a g h a n pendant  (Northair Mines),  Page 11  and  the Sechelt  Britannia the  Peninsula  - Indian  River  pendants.  B r i t a n n i a Mine, i n t h e  pendant has been the l a r g e s t p r o d u c e r i n  region.  2.2 GEOLOGY  2.2.1  Introduction  Three major g e o l o g i c  u n i t s that u n d e r l i e the southwestern  Coast Range o f B r i t i s h  Columbia a r e :  rocks,  (Table  and c o v e r u n i t s  of o l d e r s t r a t i f i e d 15 The  % of the a r e a .  stratified  rocks,  2.1, F i g . 1.1). E l o n g a t e  v o l c a n i c and s e d i m e n t a r y r o c k s P l u t o n i c rocks  plutonic pendants  make up about  make up about 30 % o f t h e a r e a .  remainder c o n s i s t s o f P l e i s t o c e n e  G a r i b a l d i Group v o l c a n i c s and a l l u v i a l  cover u n i t s that deposits;  these  include the represent  c o n t e m p o r a n e o u s , e x t r u s i o n and g l a c i a t i o n , r e s p e c t i v e l y .  Half diorite;  of t h e p l u t o n i c r o c k s however, d i o r i t e  i n t h e r e g i o n a l area  and g r a n o d i o r i t e a r e common, and a s m a l l  p e r c e n t a g e a r e gabbro and migmatite'.  The p l u t o n i c r o c k s a r e  heterogeneous i n appearance, t e x t u r e and m i n e r a l Most a r e not f o l i a t e d . i s marked by p a r a l l e l north  to northwesterly  are quartz  Local, discontinuous  and f a i n t  alignment of mafic minerals t r e n d and s t e e p  dips.  common near shear zones and pendant c o n t a c t s  proportions. foliation  t h a t have a  Foliation (Roddick,  i s most 1965).  TABLE  2.1  Formations  i n the rcqion  of Britannia  PERIOD OR EPOCH  FORMATION OR MEMBER (thickness i n meters)  Pleistocene  Cover u n i t s ( 6 0 - 1,000) Gar i b a i d i G r o u p (600)  Unconformable  Late Cretaceous  Ear ly C r e t a c e o u s  Tr i ass i c  Pennsylvanian - Permian  1. 2. 3. 4. 5. 6. 7. 8. 9. 10.  southwestern B r i t i s h  Columbia.  LITHOLOGY  AGE {Ma I  A l l u v i a l o r g l a c i a l sand a n d g r a v e l . B a s a l t , andesi t e , d a c i t e f l o w s and minor p y r o c l a s t l c s . Lamprophyre, a p l i t e and b a s i c d y k e s .  2  Contact  Granodiori te, quartz d ior i te. Quartz d i o r i t e . Granodiorite, quartz d ior i te.  I n t r u s i ve C o n t a c t  Hornblende  G a m b i e r G r o u p (1 ,800 ) Upper G a m b i e r G r o u p ( » 6 0 0 ) M i d d l e G a m b i e r G r o u p (580) Lower G a m b i e r G r o u p (600)  vein  102 • 1 5 100' 100 95 . 1  and d i o r i t e .  0 i o r 11 e Intrusions Croup on  Intrusions  -?--?  I ?\; B r i t a n n i a g r o u p ( 6 , 0 0 0 ) Britannia formation (2,000) ( p a c k a g e s 2 a n d 3) Goat M o u n t a i n f o r m a t i o n (4,000) ( p a c k a g e 11  6  6  Albian  1 1 7 c r o s s c u t t h e Bowen Gambier Island.  RELATIONSHIP UNKNOWN  Island  Group  (1.500)  Islands  Group  (thickness unknown)  2  153  ?--?--?--?--?--?-  A l t e r e d a n d e s i t e , t u f f , minor c h e r t , g r e y w a c k e and m e t a m o r p h o s e d equivalents. RELATIONSHIP UNKNOWN ?--?--?--?-?--?Itornbl e n d e - a n d e s i ne, g r a n u 1 i t e , gneiss schist, amphibolite hornfcls, q u a r t z i t e , meta-arkose, Iime-silicate rocks.  (1972).  •  S  4  --?.. 167  Argillite, intrusive-extrusive felsic dome c o m p l e x e s and p y r o c l a s t i c s . Andesite-basa1t, basalt flows, agglomerate, r h y o l i t e , f i n e t u f f .  B a s e d on U-Pb a n a l y s e s o f z i r c o n s , A r m s t r o n g in He ah ( 1 9 8 2 ) . D i v i s i o n s and t h i c k n e s s e s a r e from Roddick (1965). B a s e d on ammonite f o u n d i n a r g i l l i t e s a t P o r t e a u C o v e , J e l e t s k y in Mathews D a s e d on K-Ar a n a l y s e s by McK i M o p ( 1973 ). B a s e d on K-Ar a n a l y s e s b y C a r o n in W o o d s w o r t h ( 1 9 7 9 ) . B a s e d on K - A r a n a l y s e s o f h o r n b l e n d e i n d i o r i t e by Heah ( 1 9 6 2 ) . B a s e d on a two p o i n t i s o c h r o n f r o m Rb-Sr a n a l y s e s by Heah ( 1 9 8 2 ) . B a s e d on Rb-Sr d a t a , t h i s p a p e r ( T a b l e 5 . 3 ) . B a s e d on K-Ar d a t e , t h i s paper ( T a b l e 5 . 1 ) . T h i c k n e s s e s a r e a f t e r S c h o f i e l d in M c C u l l o u g h ( 1 9 6 8 ) .  4^  Island  1 0  Twin  3 . 3 , 101 ^ 4  U n c o n f o r mi t y  Thornborough  Bowen  7  1  Andesite, slatey t u f f s . Slate, a r g i l l i t e , arkose, q u a r t z i t e . Andesite flows, p y r o c l a s t l c s , basal volcanic debris.  Intrusive Contact  -_?_-7_.7--?--?-Jurass ic  ( F i g . 1.1),  Squami s h P l u t o n F u r r y Creek P l u t o n Mounta i n L a k e p l u t o n  Anqu1 a i  Late  Ridge  3 7  8  81 . 4 . 3 » 90., 5 ± 3 2 9  ?- - ? - - ? - - ? - -  Page 13  Stratified  u n i t s a r e Mesozoic  v o l c a n i c and s e d i m e n t a r y  p r e s e r v e d as remnants w i t h i n t h e Coast P l u t o n i c Complex. volcano-sedimentary gradational contacts  pendants  Stratified  deformed, metamorphosed and a l t e r e d  2.2.2 S t r a t i f i e d  2.1;  r o c k s a r e commonly  by C r e t a c e o u s  the o l d e s t , Britannia  e t a_l. , 1 979). i s succeeded  group  intrusions.  r o c k s i n t h e r e g i o n ( F i g . 1.1) a r e  i n t o t h r e e Groups o f d i f f e r e n t  Roddick  and h o r n f e l s e d  Rocks  V o l c a n i c and s e d i m e n t a r y divided  These  t r e n d n o r t h w e s t e r l y and have sharp t o  i n t r u s i v e contacts, or r e c r y s t a l l i z e d  (Roddick, 1965).  rocks  metamorphic grade  (Table  The Twin I s l a n d s Group, b e l i e v e d  t o be  by the Bowen I s l a n d and Gambier Groups.  r o c k s o f the B r i t a n n i a  - I n d i a n R i v e r pendant have  been a s s i g n e d t o Gambier Group by p r e v i o u s a u t h o r s  (Roddick, 1965;  Roddick  this  et a l . ,  correlation  1979; Heah e t a l . , 1986),  i s c o n s i d e r e d here t o be t e n t a t i v e .  n a t u r e of t h e s e r o c k s i n s t u c t u r a l l y l a c k of d i s t i n c t i v e and  although  The i s o l a t e d  s e p a r a t e pendants,  l i t h o l o g i e s and f o s s i l s ,  make  relationships  c o r r e l a t i o n among t h e s e s e p a r a t e b o d i e s d i f f i c u l t t o  establish.  and the  Page 14  Twin I s l a n d s Group embraces those  rocks having  i n t e n s e metamorphism o f h i g h t o upper a m p h i b o l i t e Lithologies  present  quartzite, phyllite, meta-andesite, to r e l a t i v e l y concentrated  are g r a n u l i t e , amphibolite,  and  facies.  micaceous  s c h i s t , g n e i s s , minor c o n g l o m e r a t e ,  r h y o d a c i t e and h o r n f e l s .  These r o c k s a r e c o n f i n e d  s m a l l b o d i e s , o f t e n l e s s than i n the s o u t h e r n  f r o n t o f the mountains. been found,  undergone  5 km a c r o s s ,  p a r t o f F i g u r e 1.1 a l o n g  the s o u t h e r n  Age, s p e c u l a t i v e s i n c e no f o s s i l s  has been a s s i g n e d P e n n s y l v a n i a n  have  t o Permian by Roddick  O k u l i t c h (1 973).  Bowen I s l a n d Group r o c k s a r e a n d e s i t i c interbedded  sedimentary  flows w i t h  minor  r o c k s t h a t may be t h i n l y banded c h e r t s o r  tuffs.  G e n e r a l l y , they have been metamorphosed t o g r e e n s c h i s t  grade.  The group was named f o r a t h i c k assemblage on Bowen I s l a n d  (Armstrong,  1953).  Bowen I s l a n d Group, where i t i s h i g h l y  metamorphosed, i s s i m i l a r  t o Twin I s l a n d s Group, b u t i t d i f f e r s by  c o n t a i n i n g more v o l c a n i c r o c k s and l e s s q u a r t z i t e than (Roddick, Middle  1965).  Roddick and O k u l i t c h (1973) a s s i g n e d a Lower t o  T r i a s s i c age t o t h e group, b u t f o s s i l  Gambier Group, named by Armstrong assemblage o f a n d e s i t e - a n d argillite,  the l a t t e r  (1953),  evidence  i s absent.  i s a complex  rhyodacite flows, p y r o c l a s t i c  minor c o n g l o m e r a t e , l i m e s t o n e  the n o r t h e r n p a r t o f Gambier I s l a n d .  and s c h i s t  rocks,  that underlies  Gambier Group r o c k s have.  Page 15  been metamorphosed scale  to g r e e n s c h i s t  i s complex; but g e n e r a l l y  foliation  the r o c k s have a n o r t h w e s t e r l y  Gambier Group.  Because t h i s  2.2.3  Gambier  Most  Roddick (1965) a s s i g n e d an Upper J u r a s s i c t o  i s the main u n i t  i s described  southwest.  I s l a n d n o r t h t o Mount G a r i b a l d i are- mapped  Lower C r e t a c e o u s age t o Gambier Group r o c k s  it  S t r u c t u r e on a d e t a i l e d  and bedding d i p s m o d e r a t e l y t o s t e e p l y  pendants from Gambier as  facies.  further  (see s e c t i o n 2.2.3).  i n the B r i t a n n i a pendant ( F i g . 1.1)  below.  Group  Gambier Group was d i v i d e d by R o d d i c k (1965) i n t o members: Lower, M i d d l e and Upper  (Fig.  three  2.1), on the b a s i s of a  more complete s t r a t i g r a p h i c . type s e c t i o n on Brunswick Mountain (exposures on the e a s t s i d e o f Howe Sound a r e poor, and a t no p l a c e a r e a l l t h r e e members w e l l e x p o s e d ) .  Upper Gambier  Group  c o n s i s t s of more t h a n . 600 m o f a n d e s i t e and s l a t e y t u f f . Gambier Group i s r e p r e s e n t e d by 580 m o f s e d i m e n t a r y c o n s i s t i n g of s l a t e ,  argillite,  with a n d e s i t i c Gambier  and v o l c a n i c d e b r i s ,  f l o w s and p y r o c l a s t i c  A basal together  r o c k s , forms the Lower  Group.  Age of the Gambier Group i s f a i r l y other s t r a t i g r a p h i c Roddick  rock  a r k o s e and q u a r t z i t e .  conglomerate, c o n t a i n i n g g r a n i t i c  Middle  w e l l known compared  u n i t s of the s o u t h e r n Coast P l u t o n i c  (1965) c o n c l u d e d t h a t  the Gambier Group p o s s e s s e d  with  Complex. similar  TYPE GAMBIER ISLAND  LOCATION  SECTION  BRITANNIA -INDIAN  MOUNT BRUNSWICK  6'nistrong  RIVER  ( Britannia  PENDANT  Page 16  Port )  Roddick I96S  1,250 m  1,750 m  LEGEND  Congtomerote, o r k o s e ,  1 —1  E53  greywocke  Argillite  Tuff  (lapilli,  crystal)  Block tuff, breccia  Felsic  I* •_!  lovo, flow,  sill  Mofic lava, flow, s i l l  Basalt  flow,  agglomerate  FIGURE 2.1  Comparative s t r a t i g r a p h i c s e c t i o n s , proposed by v a r i o u s workers, f o r the Gambier Group i n the B r i t a n n i a pendant ( F i g . 1 . 1 ) , southwestern B r i t i s h Columbia.  Page 17  overall  lithologic  c h a r a c t e r i s t i c s and r e l a t i o n s h i p s t o ' p l u t o n i c  r o c k s as Upper J u r a s s i c and Lower C r e t a c e o u s r o c k s e l s e w h e r e i n the Coast Mountain B e l t . c l o s e t o Highway  An A l b i a n ammonite found i n a r g i l l i t e s  #99 a t P o r t e a u Cove  (Jeletzky  in Mathews, 1972)  d e f i n e s a Lower C r e t a c e o u s age f o r M i d d l e Gambier Group. Gambier  On  I s l a n d , Gambier Group s t r a t a unconformably o v e r l i e t h e  Thornborough I n t r u s i o n s ,  f o r which M c K i l l o p  J u r a s s i c K-Ar d a t e o f 153 Ma.  (1973) o b t a i n e d an  A l o n g Howe Sound t h e b a s a l  c o n g l o m e r a t e o f t h e Gambier Group l i e s unconformably on d i o r i t e s that y i e l d  a K-Ar date from h o r n b l e n d e o f 117 + 4 Ma (Caron i n  Woodsworth, 1979), s u g g e s t i n g Lower Gambier Group i s not o l d e r than t h i s .  Roddick e_t a l .  f o r t h e Gambier Group. J u r a s s i c ammonites Peninsula  (1979) i n d i c a t e a Lower C r e t a c e o u s age  However, r e c e n t d i s c o v e r y of Lower  i n sediments from a pendant on t h e S e c h e l t  (G. Crowe, 1984, p e r s . comm.) i n d i c a t e s an o l d e r age f o r  some o f the s t r a t a mapped as Gambier  Group.  The name Gambier Group has been extended t o i n c l u d e a l l J u r a s s i c and E a r l y C r e t a c e o u s s t r a t a lithologically Island  similar  on Gambier Group s t r a t i g r a p h y ; define stratigraphically i s hampered  i n the r e g i o n that are  t o t h e v o l c a n i c s and sediments on Gambier  (Heah et. a l . , 1 986).  Correlation  Late  Little  r e c e n t work has been  therefore,  published  i t i s d i f f i c u l t to  or to c o r r e l a t e with s p e c i f i c f u r t h e r by the i s o l a t e d  areas.  nature of  fragmented remnants surrounded by p l u t o n i c r o c k s , t h e p a u c i t y o f age d a t a , and t h e l a c k o f t i m e - s t r a t i g r a p h i c u n i t s  within  Page 18  pendants. British  Most  Rugged t e r r a i n and poor a c c e s s t o c o a s t a l s o u t h w e s t e r n  Columbia c o m p l i c a t e s m a t t e r s f u r t h e r .  pendants between Vancouver and Mount G a r i b a l d i a r e shown  as Gambier 1979).  Group on The F r a s e r Map Sheet  (NTS 092; Roddick e t a l . ,  These pendants, form a n o r t h w e s t e r l y t r e n d i n g band  f a r west as Bute I n l e t w i t h i n t h i s band  t o as f a r e a s t as I n d i a n Arm.  from as  Pendants  ( F i g . 1.1) a r e l o c a t e d a t Lynn Creek, Brunswick  Mountain, Newman Creek, n o r t h e r n Gambier  Island, Britannia -  I n d i a n R i v e r and a l o n g t h e n o r t h w e s t e r n c o a s t o f Howe Sound. Pendants  lithologically  similar  t o t h e Gambier  Group  north of  Mount G a r i b a l d i a r e mapped as t h e Lower C r e t a c e o u s Cheakamus o r F i r e Lake F o r m a t i o n s .  Lithologically  s i m i l a r pendants e a s t o f  I n d i a n Arm, a r e mapped as t h e M i d d l e J u r a s s i c  Harrison  Lake  Formation.  Gambier  Group  rocks represent a Late J u r a s s i c  C r e t a c e o u s marine environment c h a r a c t e r i z e d and  felsic  plutons  v o l c a n i s m t h a t accompanied  (Woodsworth and T i p p e r ,  v o l c a n i c pendants o f Gambier  1980).  Group  by m a f i c , i n t e r m e d i a t e  uplift  i s suggestive of convergent  v o l c a n i c c y c l e w i t h voluminous p y r o c l a s t i c  greenstone b e l t s .  i s also notably  Submarine  and emplacement o f  The band o f a l i g n e d  p l a t e margin t e c t o n i c s of modern a r c r e g i o n s .  submarine environment  to Early  The m a f i c t o f e l s i c  rocks accumulating i n a  similar  t o Archean  v o l c a n i c s o f t h e Gambier  Group  r e p r e s e n t a f a v o u r a b l e environment f o r t h e a c c u m u l a t i o n o f massive  Page  sulphides.  Numerous showings and  prospects,  past-producer  B r i t a n n i a , are hosted  Gambier Group  ( F i g . 1.1).  2.2.4  B r i t a n n i a - Indian River  i n c l u d i n g the  w i t h i n rocks assigned  19  large to  Pendant  1.Introduction The km  B r i t a n n i a - I n d i a n R i v e r pendant, c o v e r i n g an a r e a o f  , i s the  l a r g e s t and  economically  r o c k s mapped as Gambier Group. Sound and  t o the south  i n c l u d e the F u r r y and  separated  i n t o two  granodiorite  remnant of  the west by Howe  w i t h an average w i d t h of 3.5  v o l c a n i c r o c k s a r e s u r r o u n d e d t o the n o r t h by  Squamish p l u t o n , and that  I t i s bounded on  e x t e n d s e a s t f o r 24 km,  S e d i m e n t a r y and  most s i g n i f i c a n t  and  e a s t by  The  batholithic  Mountain Lake p l u t o n s .  p a r t s , B r i t a n n i a and  "bridge".  150  w e s t e r n end  The  km. the  rocks  pendant i s  I n d i a n R i v e r , by a a t B r i t a n n i a , an a r e a  of  9 90 km  , t r e n d s e a s t - w e s t from t i d e water a t B r i t a n n i a Beach, t o  the B r i t a n n i a open p i t s , The  e a s t e r n end,  from where i t c o n t i n u e s  I n d i a n R i v e r , i s 60 km  and  northwesterly.  trends  northwesterly.  C o r r e l a t i o n of B r i t a n n i a pendant s t r a t i g r a p h y w i t h Gambier Group i s u n c e r t a i n and lithological  weak, and  i n the absence of f o s s i l s  i s based  on  similarities.  2. L i t h o l o g y Stratigraphy the pendant was  i n both  the B r i t a n n i a and  considered  I n d i a n R i v e r p a r t s of  c o r r e l a t i v e by James  (1929), even  Page  though they are parts  s e p a r a t e d by  each c o n t a i n  of f e l s i c  an  a granodiorite  eastern  pyroclastics.  "bridge".  b e l t of a n d e s i t e  and  L i t h o l o g i e s present are:  The  pillowed  d a c i t e t o r h y o l i t e f l o w s and  volcanic  a r g i l l i t e , minor greywacke, a r k o s e , and  altered quartz-sericite schist. of m a f i c f l o w s and volcanics  pyroclastic debris  and  overlying  Structure  The  most prominent s t r u c t u r e s  zones of n o r t h w e s t e r l y t r e n d i n g ,  the  The  steeply  trend  t u f f s and  pendant are  strongly  schistose  of b e d d i n g and  by  the  felsic  breccias,  subparallel and  altered  pendant, and  u n i t s at a small  cuts  angle  the  northwesterly regional  ( F i g . 1.1).  It is  i n t e r p r e t e d here as a s t r a t i g r a p h i c l a y e r , h y d r o t h e r m a l l y during  the  emplacement of massive s u l p h i d e s  p r e f e r e n t i a l l y deformed. t o the the  The  Indian  B r i t a n n i a Shear Zone, c u t s  pendant.  To  the  extension  of  the  S o u t h e a s t of the a l o n g the  River  across  northwest, across  pendant, a s i m i l a r zone of  pile  Shear Zone", p r o x i m a l t o a l l  (Payne e_t a l . , 1980), t r e n d s  the w e s t e r n h a l f of  highly  sediments.  i n the  dipping."Britannia  B r i t a n n i a orebodies  across  intruded  p o r p h y r i t i c cores with f l a n k i n g  3.  rock.  pyroclastics,  These r o c k s form a complex  a g g l o m e r a t e s o v e r l a i n and  dominated by  two  a western b e l t  basalts, andesite, breccias,  20  and  subsequently  Shear zone,  the  altered  Indian  parallel  River  Howe Sound i n a  half  small  sheared r o c k s o c c u r s i n what may  B r i t a n n i a pendant shear zones  (Fig.  be  1.1).  B r i t a n n i a pendant, a migmatite body i s a l i g n e d  same n o r t h w e s t e r n  trend.  of  an  Page 21  I n t e r n a l s t r u c t u r e of the pendant i s complex. understood forest  I t i s not w e l l  because of a l a c k of p e r s i s t e n t marker u n i t s and  cover.  Original  stratigraphic  obscured  by numerous major and  bodies.  As a r e s u l t ,  heavy-  r e l a t i o n s h i p s are a l s o  minor f a u l t s , and  the normal s t r a t i g r a p h i c  large intrusive  s u c c e s s i o n of the •  u n i t s a c r o s s the pendant i s p o o r l y known.  A major a n t i c l i n a l degrees,  was  s t r u c t u r e , plunging  t h a t the B r i t a n n i a Shear Zone c o i n c i d e d w i t h the  of t h i s a n t i c l i n e e a s t of the Jane B a s i n  along  the F u r r y Creek v a l l e y .  The  g e n e r a l t r e n d of bedding  was  and  In the mine a r e a d i p s steepen  major s t r u c t u r e i n the  axial  ( F i g . 3.1 ) and  the western h a l f of the pendant i s n o r t h w e s t e r l y degrees southwest.  of  Payne e t a_l. (1 980)  plane  The  35  d e s c r i b e d by James (1929) i n the B r i t a n n i a h a l f  the pendant w i t h i n d a c i t i c v o l c a n i c s . suggested  northwest a t  across  d i p s are  t o 70  I n d i a n R i v e r h a l f of the  45  degrees.  pendant  i n t e r p r e t e d by James (1929) t o be a n o r t h e r l y p l u n g i n g  anticline. (Fig.  3.1)  Farther  Bedding a t the n o r t h w e s t e r n s t r i k e s northwest and  southwest a l o n g  southeastern Roddick noted  end  (1965),  end  d i p s 45 degrees  the r i d g e , bedding  of the r i d g e beds steepen unable  southwest..  is horizontal. to  northwesterly,  s t e e p d i p s t o the  At  the  almost•vertical.  t o r e f u t e or c o n f i r m James'  o n l y t h a t the r o c k s t r e n d e d  Indian R i v e r , with  of I n d i a n R i v e r Ridge  southwest.  interpretation,  parallel  to  Page 22  4.  Age  No  f o s s i l s have been  found i n the pendant;  hence  the o n l y  c o n s t r a i n t s a r e based on the age of p l u t o n i c r o c k s t h a t the v o l c a n i c s . about  100 Ma  zircons. 3.3  Ma  (Armstrong i n Heah, 1982), based on U-Pb  a u r e o l e s i n the pendant  p l u t o n s a r e younger pendant  yield  reset  the  Shear Zone.  to  considerable  i n the B r i t a n n i a - I n d i a n R i v e r pendant.  t h a t might  Ten  major  A l l a r e i n the n o r t h w e s t - t r e n d i n g .  Within t h i s  zone o f a l t e r e d  s p a t i a l l y w i t h massive  r o c k , massive  porphyritic  r e p r e s e n t v o l c a n i c domes.  B r i t a n n i a d e p o s i t s were d i v i d e d Kuroko-type m i n e r a l i z a t i o n sulphate,  i n d i c a t e that  i n o p e r a t i o n f o r almost 70 y e a r s from 1905  sulphides are a s s o c i a t e d dacites  Contact  Mineralization  o r e b o d i e s were d e v e l o p e d . Britannia  +_  r o c k s (Payne e t a_l. , 1 980).  the f o c u s o f numerous r e p o r t s and  exploration  95.1  ages.  B r i t a n n i a Mine, was  than the pendant  and  rocks" a r e o l d e r than m i d - C r e t a c e o u s but commonly  5. Economic  1974,  clearly  analyses of  +_ 4 Ma  by K-Ar methods on h o r n b l e n d e from d i o r i t e .  Thus,  intrude  The Squamish and F u r r y p l u t o n s a r e m i d - C r e t a c e o u s ,  Heah (1 982) a l s o o b t a i n e d d a t e s o f 101  metamorphic  age  sulphide-sulphate  copper o r e s " , and  stockwork  of the 50 m i l l i o n  tonnes  i n t o c a t e g o r i e s comparable  (Payne et_ a_l. , 1 980) "zinc ores", sulphide "chalcopyrite veins".  (55 m i l l i o n  to  including "siliceous Eighty percent  t o n s ) o f o r e produced  was  Page 23  from  " s t r i n g e r o r e " , the o t h e r 20  % was  from  "massive s u l p h i d e s " .  A s e r i e s of m i n e r a l o c c u r r e n c e s , p r i m a r i l y minor Pb,  Zn, Ag and  Mo,  sulphides  There has  ( F i g . 3.1)  ( p r o p e r t y h e l d by Clendenan, 1978).  and  flows r e l a t e d  Pb,  Zn and  North  ( F i g . 1.1)  a t the  l a y e r e d Pb-Zn s u l p h i d e s and  p y r i t e and  3.1)  a s c h i s t o s e porphyry  sphalerite  chert  and  to  property ( F i g . in a  At the Roy  siliceous  felsic, prospect ( F i g .  a s s o c i a t e d w i t h f l o w banded  rhyolite,  j a s p e r , h o s t s massive c h a l c o p y r i t e , p y r i t e and  ( R i c c i o and  Rebagliatti,  unpublished  minor  r e p o r t , 1980).  6. H i s t o r y of Mapping B r i t a n n i a Mine was  veins  c h a l c o p y r i t e and  i n t e r m e d i a t e to  deformed v o l c a n i c sequence.  b r e c c i a s and  zone"  high-grade  ( F i g . 3.1)  c h a l c o p y r i t e occur  zone i n r h y o d a c i t e t u f f w i t h i n an moderately  and  l e n g t h of s e v e r a l hundred m e t e r s .  Three k i l o m e t e r s south on the Ray  D i t s o n , 1978)  tuffs  "vent  i n l o d e s t h a t a r e v e i n - l i k e but conformable  stratigraphy..  as  McVicar  r h y o l i t e b r e c c i a h o s t s c o n c e n t r a t i o n s of p y r i t e ,  1.1;  southern  Ag o c c u r  t o a proposed  of Mount Baldwin  Creek a t the MacKinnon p r o p e r t y  sphalerite  the  these  I n t e r n a t i o n a l Maggie Mines L t d . , Vancouver;  l e n s e s o c c u r over a s t r i k e  On Ray  Cu,  On  i n a r g i l l a c e o u s rocks a s s o c i a t e d with r h y o l i t e  p o r p h y r i t i c amygdaloidal  properties  been no p r o d u c t i o n from  despite considerable exploration.  f l a n k of Mount Baldwin  with  have been l o c a t e d a l o n g the " I n d i a n R i v e r  Shear Zone" ( F i g . 1.1). occurrences  of Cu but  the f o c u s of mapping a c t i v i t y  and  Page 24  exploration  i n the B r i t a n n i a - I n d i a n  part of the century reports but  1.1).  with r e g i o n a l  pendant i n t h e e a r l y  Numerous u n p u b l i s h e d  from 1919 t h r o u g h 1971 d e s c r i b e  few d e a l  The  (Table  River  t h e g e o l o g y o f t h e mine,  c o r r e l a t i o n s of stratigraphy.  name B r i t a n n i a group was o r i g i n a l l y  (1908) f o r a r g i l l i t e ,  proposed by LeRoy  slate, andesitic tuffs,  breccias  o u t c r o p p i n g a l o n g Howe Sound south o f B r i t a n n i a Creek. within  company  t h e pendant, S c h o f i e l d  (1926) d i v i d e d  and f l o w s Mapping  the B r i t a n n i a  group  i n t o t h e Goat Mountain f o r m a t i o n on Goat R i d g e i n t h e n o r t h , and the  overlying  subdivided  He a l s o s u g g e s t e d t h e r e v e r s e  formations, b e l i e v i n g the B r i t a n n i a  thrust This  James  (1929)  t h e Goat Mountain f o r m a t i o n i n t o Lower, M i d d l e and  Upper members. two  B r i t a n n i a formation i n the south.  into i t s overlying  proposed f a u l t ,  southwest, o c c u r r e d  relationship f o r th  f o r m a t i o n t o have been  p o s i t i o n along a steeply  striking  inclined  n o r t h w e s t e r l y and d i p p i n g  a t the contact  between v o l c a n i c  Goat Mountain f o r m a t i o n and a r g i l l i t e s  fault  t o the  rocks of the  of the B r i t a n n i a  formation  A c c o r d i n g t o James (1929), t h e Lower Goat Mountain f o r m a t i o n i s absent  i n t h e B r i t a n n i a Mine  Later of  area.  i n v e s t i g a t o r s a l t e r n a t e l y adopted e i t h e r i n t e r p r e t a t i o n  t h e r e l a t i v e p o s i t i o n s o f t h e two f o r m a t i o n s  Roddick  ( F i g . 2.1).  (1965) and Payne e t a l . (1980) agreed w i t h James  . i n t e r p r e t a t i o n of t h e o l d e r present p o s i t i o n o v e r l y i n g  Britannia  formation thrust  t h e younger Goat Mountain  1  into i t s  formation.  Page  This  paper, f o l l o w i n g  of the  Britannia  dipping  basalts  This  Schofield  f o r m a t i o n t o be of  the  Ridge d i p and  continuous succession  formation  McCullough of the  west end  argillites  section  pendant.  of B r i t a n n i a  southwest, and  homocline f a c i n g  the  Goat Mountain  volcanics  correlated,  on  i n the  the  (Heah e t a l . , 1986;  the  formation stratigraphy  interpreted  and  by  McCullough  facing consistently  southwest  Pilot  by strata on  the  (1968)  southwest.  Mountain form a  gently  (Heah, 1982).  basis  Britannia of  - Indian River  l i t h o l o g y , w i t h the  Roddick, 1965).  Roddick  pendant has  equivalent  to the  formation.  Following  f o r m a t i o n was basis  similarities  thick  shales  James (1929), the  correlated of  sequence of  t o the  (1965) s u g g e s t e d  the  that  possibly  Britannia  Lower Goat Mountain  Upper member of  i t s presumed younger age  (Roddick, 1 965;  of  been  Gambier Group  M i d d l e Gambier Group exposed a t Brunswick Mountain was  the  of  C o r r e l a t i o n w i t h Gambier Group  Stratigraphy  on  form a  support t h i s a t t i t u d e f o r  Britannia  Ridge was  of  S t u d i e s from a d j a c e n t a r e a s  Goat Mountain f o r m a t i o n s t r a t a a t Sky  7.  east  arid f e l s i c  Heah (1 982)  as a m o n o c l i n a l p a n e l d i p p i n g  dipping  the  consistently  ( F i g . 2.1).  (1968) and  Britannia  formation.  s t r a t a on  face  argillites  to o v e r l i e m o d e r a t e l y  from m a i n l y m a f i c f l o w s of  formation to o v e r l y i n g Britannia  younger and  Goat Mountain  work c o n c l u d e s t h a t  Britannia  (1926), i n t e r p r e t s the  25  and  the  Gambier Group  lithological  Payne e t al.. , 1 980 ).  Here,  following  Page 26  Schofield  (1926) and McCullough  (1968), t h e Goat Mountain  f o r m a t i o n i s presumed t o u n d e r l i e therefore  cannot be c o r r e l a t e d  the B r i t a n n i a  formation; i t  w i t h the Upper member o f the  Gambier Group.  Problems e x i s t i n c o r r e l a t i n g v o l c a n i c different 2.1). the  thicknesses s t r i c t l y  p i l e s of s i g n i f i c a n t l y  on the b a s i s  of l i t h o l o g y ( F i g .  The same l i t h o l o g i e s a r e r e p e a t e d s e v e r a l  s t r a t i g r a p h i c s e c t i o n o f t h e Gambier Group.  times  throughout  Andesites  i n both the Upper and Lower members o f Gambier Group. u n i t s of a r g i l l i t e , Britannia  approximately  group r o c k s .  Gambier Group t h e r e f o r e one  of t h e s e a r g i l l i t e  occur  Several  500 m t h i c k , a r e p r e s e n t  within  The t h i c k sequence o f a r g i l l i t e s  of Middle  cannot be c o r r e l a t e d  t o any  units.  confidently  S i m i l a r i l y , m a f i c f l o w s o f the Goat  Mountain f o r m a t i o n cannot be a s s i g n e d t o a s p e c i f i c member o f Gambier Group.  Britannia  group r o c k s form a t h i c k n e s s  6,000 m compared t o t h e type s e c t i o n o f 1,750 m. stratigraphic 'position within detailed  Britannia on  of  group w i t h members o f the  In t h e absence o f f o s s i l s  pendant, c o r r e l a t i o n on the b a s i s  the upper l i m i t  Resolution  t h e pendant i s n e c e s s a r y b e f o r e more  c o r r e l a t i o n . o f the B r i t a n n i a  Gambier Group i s p o s s i b l e .  o f over  from the  o f age r e s t s  imposed by d a t e s o f p l u t o n i c  rocks.  loosely  Page 27  3. LOCAL GEOLOGY  3.1  INTRODUCTION  The  e a s t s e c t i o n o f B r i t a n n i a Ridge  v o l c a n i c and s e d i m e n t a r y  ( F i g . 3.1) i s u n d e r l a i n by  rocks of the B r i t a n n i a  t o be Gambier Group by Roddick  et al.(1979).  pendant  indicated  The pendant  rocks  a r e s u r r o u n d e d by i n t r u s i o n s o f the Coast P l u t o n i c Complex.  Rocks  of t h e a r e a have been r e g i o n a l l y metamorphosed t o lower greenschist  facies.  (McCullough,  C o n t a c t a u r e o l e s from 300 t o 1,200 m t h i c k  1968) s u r r o u n d t h e p l u t o n s and o v e r p r i n t  regional  metamorphism w i t h i n the pendant.  The  study a r e a  80 % o f which volcanic  [Figs.  3.1, 3.2 ( i n p o c k e t ) ] c o m p r i s e s  is stratified  rocks that c o n s i s t  f l o w s and p y r o c l a s t i c s .  Stratified  monoclinal panel d i p p i n g moderately here as a c o n t i n u o u s v o l c a n i c younging  t o the southwest.  character the base  r o c k s form a  sequence  domes and f e l s i c  interpreted progressively  W i t h i n the map a r e a r o c k s change  from p r i m a r i l y m a f i c f l o w s and f e l s i c of the sequence,  predominantly of  t o the southwest,  - sedimentary  22 km^,  subaerial t u f f s at  through i n t r u s i v e and e x t r u s i v e  pyroclastic  tuffs,  t o dominantly  felsic  sedimentary  r o c k s a t the t o p o f the p i l e .  The  w r i t e r mapped the study a r e a o f F i g u r e 3.2 a t a s c a l e o f  FIGURE 3.1  S i m p l i f i e d geology of the B r i t a n n i a Ridge area, southwestern B r i t i s h Columbia. A r e a mapped i n d e t a i l ( F i g . 3.2 ( i n p o c k e t ] ) i s o u t l i n e d by b o x . P l u t o n i c m i d - C r e t a c e o u s g r a n o d l o r i t e and d i o r i t e are patterned with The B r i t a n n i a pendant h a s no p a t t e r n o u t s i d e t h e a r e a d e t a i l e d ; w i t h i n t h e box, p a c k a g e s 1 t o 3 ( s e e T a b l e 3.1) a r e d e f i n e d by c r o s s e d , h o r i z o n t a l a n d i n c l i n e d h a t c h i n g , respectively. " S h e a r z o n e s " a r e d e f i n e d by f a u l t s y m b o l s . O l d mine workings i n t h e B r i t a n n i a I n d i a n R i v e r p e n d a n t a r e i d e n t i f i e d by s t a r s .  ^ ^ ^ to CO  Page 29  1:5,000, w i t h s e l e c t e d detailed  a r e a s a t 1:2,000 and 1:1,000, u s i n g  t o p o g r a p h i c maps (with 5 m c o n t o u r  altimeter  to e s t a b l i s h c o n t r o l .  r o c k s o f the B r i t a n n i a  pendant.  Emphasis was on t h e s t r a t i f i e d The f i e l d base map, F i g u r e A.1  ( i n pocket)  includes detailed  geology,  locations.  Unit descriptions  a r e based  hand specimen o b s e r v a t i o n s s u p p o r t e d varies  c o n c l u s i v e determination of primary Field  (from F i s h e r  (Fig.  relative  to the B r i t a n n i a  3.1). The packages,  Terminology  of mafic flows.  complex and b a s i n a l  d e f i n e d by l i t h o l o g y and  to as: the " f o o t w a l l " ,  n o r t h t o south "mine" and  Major f e a t u r e s o f t h e s e  i n T a b l e 3.1.  Package 1 c o n s i s t s  Package 2 i s dominated by a f e l s i c dome  f a c i e s b l a n k e t e d by p y r o c l a s t i c  Package 3 c o n s i s t s  felsic  o f f e l s i c ash f l o w s o v e r l a i n  sequence o f b l a c k a r g i l l i t e .  Strata  i n each  d i p and f a c e s o u t h w e s t e r l y .  Ridge  i n the Jane B a s i n  numbered 1, 2 and 3 from  t h r e e packages a r e o u t l i n e d  Britannia  f o r the u n i t s .  orebodies  " h a n g i n g w a l l " sequences r e s p e c t i v e l y .  consistently  consequently,  r o c k s w i t h i n the map a r e a o f F i g u r e 3.2 'were  i n F i g u r e 3.1, a r e r e f e r r e d  tuff.  suite;  Alteration  o f p y r o c l a s t i c r o c k s i s i n Appendix A ( F i g . A . 2 ) .  i n t o t h r e e packages i n i t i a l l y  primarily  on o u t c r o p and  and Schminke, 1984 and Schimd, 1981) used f o r  .Stratified  position  primarily  rock types always has not been  names have been r e t a i n e d  classification  divided  and o u t c r o p and sample  by p e t r o g r a p h y .  t o extreme i n t h e m e t a v o l c a n i c  made.  i n t e r v a l s ) and an  crystal  by a t h i c k  of the packages  D i v i s i o n o f the r o c k s on  i n t o these t h r e e main packages p r o v i d e d a u s e f u l  Page  TABLE 3.1  Major f e a t u r e s d e f i n i n g B r i t i s h Columbia.  PACKAGE Name FORMATION (Schof i d d , (Roddick,  packages  ( F i g . 3.1) i n t h e e a s t  "FOOTWALL" SEQUENCE  1926)  DISTRIBUTION  Goat  Tops  ALTERATION  SEQUENCE  Britannia M i d d l e Gambier Group  N o r t h s lope of Br i tann ia R i dge, east s e c t i o n  South s l o p e of B r i t a n n i a Ridqe, east s e c t i o n  Southwest o f B r i t a n n i a p i t s , and south o f - F u r r y Creek  Andes i t e - b a s a 1 1 , Basalt flows, b r e c c i a s and p y r o c l a s t i c s R h y o l i te l a v a domes Felsic tuffs  Argi1 l i t e Daci t e dome complex; i n t r u s i ve and e x t r u s i ve Quartr-sericite sch i s t  Rhyodac i t e f l o w s , ash f l o w s F e l s i c tuff Argi11ite Dac i t e , Andes i te i n t r u s i v e s , dykes  - Beds d i p moderate I y and ( a c e southwest 30 Hpqrpps southwest. D i p s n o r t h on t o p of r h y o l i t e domes  40 d e q r e e s southwest. Steepens In 70 ,|,., p«. southwest i n " r . h i v i r ?one"  20 d e g r e e s  l'p h,is«d on qrad i nq, s c o n r i t i ' i , .md p i l l o w morphn1oqy  tip hased on q r a d i n q , lo.nlinq, dome morpholoqy .intI sul ph ide morpho 1 oqy  Up based on q r a d i n q  lt  1,400 m  1 , 200  Copper rl i ss^mi nat i i n r h e r ty f Iow • to brecc \ a s ' N a t i v e t:opp<*r i n v Seawater: N a - r i c h Uydrnthfrm-i I : MnCa prior  southwest  s  m  flOO m  Con formab1e: a r q i 1 1 i t e o v e r l i e s pillow basalt and ash f1ows I n t r u s i v e : d . t r i t e 'fome complex c u t s pi 1 ;.IW*HJ  U n d e f i n e d : be Iip vod to form t h<? top of the b a s a l t sequence on Goat. R i duo  haS.I It.  MINERALIZATION  "HANG INGWALL"  Britannia M i d d l e Gambier Group  THICKNESS LOWER CONTACT  Ridqe s t u d y a r e a ( F i q . 3.2), s o u t h w e s t e r n  "MINE" SEQUENCE  Mountain  STRUCTURE Dips  Dritan  30  f 1 ows  Conformab l e : q u a r t schist separates l i t h i c t u f f above contac t Faulted m places pits  Gold i n quartz veins Copper d i s s e m i n a t e d i n c r y s t a I l i t h i c tuf f  flydrother m,i 1 : M q - n c h  R e la t i v e 1 y una I t e r e d  METAMORPHISM qreenschisr - - b i o t i te aureo le  Contact  cons i s t e n t ,  FOLIATION  Foss i I s  none undef ined  La te C r e t a c e o u s 00.5 * 1.0 Ma  fa<:i«s  300 t o 1,200 m from  nor thwest-1 rend t nq,  AGE  Rb - Sr  i n t h e open  n r i ta nn i a "r ehod i 1 7 d i s t i nc t mini n-i 1 of r I nqer , mass i ve bedded f-optu- r -1 i n<; o  'Jij-i r t z - se r i t; i ( - - c h l o r i t e  Regional  z• crystal and below  La te J u r a s s i c 1ft) . S4  Cretacf 4 . 1 M.i  intrusive  contact  --  with s t e e p southwestwa rd d i p  Page  f r a m e w o r k f o r m a p p i n g and packages are felsic  interpreted  of  Selected  as  and  to the  Major  that  D a t i n g by  Intrusions Preliminary  1979;  in.this  b a s e map  r o c k s from  mafic  from  to  stratigraphic  contact  and  trace  study, are  extent.  elements.  i n Appendix  A.  included only  ( F i g . A.1 ) f o r f u t u r e the  least  the B r i t a n n i a an  altered Ridge  flow  area  as  i n t e r m e d i a t e Fe  Cascade Fe-poor t r e n d i n  t h e K-Ar  and  and  dates  rocks a  content  Fe-enric.hment  intrusive  Rb-Sr d a t a  to these  Rb-Sr methods i s i n Chapter  interpreted  a later  Late J u r a s s i c ,  assigned  for.major  s u i t e w i t h a medium K and  p r o v i d e two  be  complex  The  4).  (Chapter  may  field  follows a typical  data  used  element analyses  were used t o c l a s s i f y calc-alkaline  by  and  t r a c e element analyses are  element a n a l y s e s , not  studies.  mainly  o f unknown movement and  samples were a n a l y s e d  supplemental  stratigraphy.  Further structural  numerous f a u l t s  w h o l e r o c k and  local  as a c o n t i n u o u s  the model i s i n d i c a t e d  relationships  Trace  here  v o l c a n i c sequence.  definition  All  interpreting  31  indicate o l d e r than  as  r e s e t by  or deformational rocks  the E a r l y  W o o d s w o r t h and  event. Ridge  Cretaceous.age (Roddick  Roddick,  K-Ar  Plutonic •  i n the B r i t a n n i a  assumed Gambier Group r o c k s  Woodsworth, 1979;  Coast  5.  1975).  area  presently  e_t a l . ,  Page 32  3.2 PACKAGE 1, "FOOTWALL" SEQUENCE  3.2.1  Introduction  Package 1, t h e " f o o t w a l l " sequence, o c c u p i e s of  Figure  3.2 ( i n p o c k e t ) ,  the northern  part  southwest o f the Mountain Lake p l u t o n ,  where i t forms t h e c r e s t and n o r t h  slope of B r i t a n n i a Ridge.  Package 1 i s c h a r a c t e r i z e d by a t h i c k s u c c e s s i o n o f v a r i a b l y a l t e r e d mafic  flows, with  submarine ash f l o w s . 1,400 and  m thick. altered  local  felsic  domes and i n t e r b e d d e d  The package, d i v i d e d i n t o  seven u n i t s , i s  Flows, flow b r e c c i a s and a g g l o m e r a t e s  p i l l o w lavas  (unit  (unit 2),  7) exceed 1,000 m combined  t h i c k n e s s and make up more than  70 % o f the package.  Discontinuous  wedges o f a n d e s i t i c p y r o c l a s t i c b r e c c i a and t u f f -  breccia  6) up t o 350 m t h i c k , and r h y o l i t e domes w i t h  (unit  r e l a t e d b r e c c i a s and f e l s i c  tuffs  t h i c k , o c c u r w i t h i n the m a f i c 30  % of t h i s  ( u n i t s 3, 4 and 5) up t o 400 m  sequence and make up t h e r e m a i n i n g  package.  3.2.2 U n i t D e s c r i p t i o n s  Argillite, south Ridge.  unit  o f Condor Lake  1, i s exposed on t h e s t e e p n o r t h  - f a c i n g slope  ( F i g . 3.2) a t t h e e a s t e r n end o f B r i t a n n i a  A t h i c k n e s s o f 125 m o f p u r p l e - b l a c k ,  thinly  bedded,  Page 33  fissile  a r g i l l i t e w i t h minor i n t e r b e d s of grey  crystal  tuff  i s present.  base of u n i t  to b u f f ash  Beds d i p 15 to 22 degrees southwest.  1 i s not exposed.  U n i t 1 i s the o l d e s t i n the  a r e a because bedding a t t i t u d e s i n d i c a t e i t u n d e r l i e s southwesterly  dipping basalts (unit  prominent n o r t h Felsic  north  tuff  above u n i t  ( u n i t s 4 and  ( u n i t 20)  G r a n o d i o r i t e and intrude unit  h o r n f e l s e d appearance of u n i t submarine d e p o s i t i o n p r i o r  Andesite-basalt, unit of s h a l l o w - d i p p i n g and  agglomerate.  F i g u r e 3.2, dipping  and  The  b r e c c i a s on  the  2,  forms a s u c c e s s i o n  i s a l s o present  - south  account  present  quiet  2.  to 600  m thick  interflow breccia  most of the northwest c o r n e r  i n outcrops  r i d g e running  ( F i g . 3.2).  flows,  400  steep  Mountain  f o r the  unit represents  to i n t e r m e d i a t e  outcrop  d i o r i t e of' the  the south  I t i s best exposed on perpendicular  Feldspar  the r i d g e i n t e r f i n g e r  along  to and  porphyritic basalt  to the northwest with  agglomerate member o v e r l y i n g b a s a l t flows and G l o r y Hole  on  by a f a u l t on the  to the e x t r u s i o n of u n i t  Unit 2 occupies  of B r i t a n n i a Ridge and  mafic  1.  1 and  s l o p e e a s t of C y r t i n a Creek.  prominent n o r t h  map  the  5) t h a t d i p n o r t h  1, but are s e p a r a t e d  - facing slope.  Lake p l u t o n  2) t h a t o u t c r o p  The  - t r e n d i n g r i d g e west of Condor Lake ( F i g . 3.2).  b r e c c i a and  directly  and  hyaloclastite  of  the north flows the on  road.  Dark-grey weathering flows .at the base of u n i t  f i n e - g r a i n e d b l a c k a n d e s i t i c to 2 are o v e r l a i n by a 7 m t h i c k  basaltic  Page  h y a l o c l a s t i t e w i t h fragments Massive  flow-top b r e c c i a .  columnar j o i n t s ,  approximately 3 mm  clay  f l o w s up t o 10 m t h i c k a r e s e p a r a t e d by  rusty, chert f i l l e d and  i n a minor white  45 degrees  a c r o s s , and  sausseritized. %) o l i v i n e and  and  surrounds  matrix.  2 t o 5 m of o f t e n  White c h e r t f i l l s  angular blocks.  southwest.  P l a g i o c l a s e phenocrysts,  a u g i t e are present l o c a l l y . i n (3 % ) , 1 t o 5 cm  elongated p e r p e n d i c u l a r to flow c o n t a c t s .  1 to  and  They g e n e r a l l y a r e randomly o r i e n t e d .  amygdules  fractures  Flows d i p  p r e s e n t up t o 15 %, a r e s u b h e d r a l  groundmass. Quartz  34  Trace  (<1  the v e r y f i n e g r a i n e d a c r o s s , are  C a l c i t e amygdules a r e  rare.  A dark green w e a t h e r i n g (agglomerate)  and  tuff  mafic p y r o c l a s t i c  - b r e c c i a member, 150  i n t e r f i n g e r s w i t h the massive  breccia t o 350  degrees  lapilli.  The  c h a l c o p y r i t e and  Tuff  lapilli,  matrix  2  The  t h i c k u n s o r t e d beds t h a t d i p 45  to the southwest.  m a f i c bombs, m a f i c  thick,  f l o w s near the base of u n i t  o u t c r o p p i n g a l o n g the G l o r y Hole Road ( F i g . 3.2). m o n o l i t h i c b r e c c i a s form  m  and  - b r e c c i a c o n t a i n s subrounded o c c a s i o n a l r h y o l i t e and  pumice  i s m a f i c t u f f w i t h t r a c e d i s s e m i n a t i o n s of  pyrite."  Dark green w e a t h e r i n g e a s t of C y r t i n a Creek,  massive  feldspar porphyritic andesite,  i s o v e r l a i n by m a f i c t u f f  - breccia  c o n s i s t i n g of a n g u l a r t o i r r e g u l a r m a f i c a m y g d a l o i d a l p o r p h y r i t i c blocks i n a s i l i c e o u s matrix.  Felsic  feldspar  fragments  are  Page 35  r a r e l y present.  The m a f i c  m o n o l i t h i c mafic  lapilli  Samples from u n i t calc-alkaline  tuff  - breccia i s gradational to  - t u f f and i n t e r m e d i a t e  2 plot- as r e l a t i v e l y  island arc b a s a l t i c andesite  from two samples o f u n i t  unaltered c a l c i c to (Chapter  4).  Analyses  2 a r e a l k a l i - p o o r compared t o average  Cascade v a l u e s f o r b a s a l t i c a n d e s i t e K-Ar  tuff.  ( I r v i n e and Barager,  mid-Cretaceous d a t e s o f 90.5 +_ 3.2 Ma (Chapter  i m p o s s i b l y young and most p r o b a b l y  1971).  5) a r e  r e p r e s e n t r e s e t t i n g by  i n t r u s i o n of the Mountain Lake p l u t o n .  Unit 2 represents mafic  f l o w s , flow b r e c c i a s and i n t e r b e d d e d  agglomerate w i t h minor m a f i c on  tuff  - breccia.  Smooth upper s u r f a c e s  f l o w s , columnar j o i n t i n g and the p r i s m a t i c shape o f the flow,  members may be i n d i c a t i v e of c o n f i n e d s u b a e r i a l a c c u m u l a t i o n the n o r t h - south  r i d g e p e r p e n d i c u l a r t o B r i t a n n i a Ridge  along  ( F i g . 3.2).  West o f t h i s r i d g e , i n t e r f i n g e r i n g agglomerates and b r e c c i a s r e p r e s e n t a s l o p e o r flow f r o n t o f some r e l i e f ,  and a subaqueous  environment o f d e p o s i t i o n .  Rhyolite,  u n i t _3, c o n s i s t s of creamy f e l d s p a r p o r p h y r i t i c •  i n t r u s i v e and e x t r u s i v e phases t h a t form s m a l l domes and plugs along  the c r e s t o f B r i t a n n i a Ridge  brecciated two  rhyolite unit,  (Fig. 3.2).  100 t o 400 m t h i c k ,  The massive and i s separated  into  main b o d i e s : the e x t r u s i v e . "Ridge l a v a dome" o u t c r o p p i n g  the r i d g e , and the l a r g e l y  intrusive  " C y r t i n a dome"  along  outcropping  Page 36  northeast  of C y r t i n a  Creek  ( F i g . 3.2). S m a l l e r b o d i e s o f v a r i a b l y  exposed r h y o l i t e o c c u r s c a t t e r e d  along a northwesterly  trend  around and between t h e s e two main b o d i e s .  Fine-grained on  r h y o l i t e weathers w h i t e t o b u f f  fresh surface.  In t h i n s e c t i o n the r h y o l i t e i s  glomeroporphyritic. 0.05  mm,  Up t o 20 % p l a g i o c l a s e p h e n o c r y s t s , 0.1 by  are scattered  through a f i n e - g r a i n e d  a n h e d r a l q u a r t z and f e l d s p a r . slightly  and i s g r e y - g r e e n  groundmass o f  The c r y s t a l s a r e zoned, w i t h  sausseritized.  " C y r t i n a dome" c o n s i s t s o f massive r h y o l i t e w i t h  amygdules,  c o a r s e s p h e r u l i t e s , wispy m a f i c fragments and a n g u l a r concentrated a t the contact units. unit  cores  I t represents  5, and l o c a l  o f t h e dome w i t h o v e r l y i n g  a s h a l l o w endogenous p l u g .  remnants o f u n i t  blocks sedimentary  Felsic  t u f f of  4, o v e r l i e and c o v e r much o f t h e  dome.  The  "Ridge l a v a dome" c o n s i s t s o f r h y o l i t e w i t h  coarse to f i n e flow - banding. basalts  This  r h y o l i t e l i e s d i r e c t l y on  of u n i t 2 along B r i t a n n i a Ridge.  gossanous, p y r i t i c , flow b r e c c i a  Rhyolite  framework s u p p o r t e d  I t i s o v e r l a i n by a flow b r e c c i a .  i s o v e r l a i n by u n i t 4, a s t e e p l y  with large blocks  excellent  dipping  The r u s t y tuff  breccia  o f f l o w banded f e l d s p a r p o r p h y r i t i c r h y o l i t e .  of unit  3 i s chemically  distinct  from o t h e r  felsic  Page 37  v o l c a n i c r o c k s i n the map a r e a . altered calc-alkaline  Samples of C y r t i n a dome p l o t as  r h y o l i t e with r e l a t i v e l y  MgO and N a 0 v a l u e s compared t o the o t h e r 2  r h y o l i t e s and d a c i t e s i n the map area the Ridge l a v a dome a r e a v a i l a b l e . r h y o l i t e s of t h e Cascades, u n i t K 0  low CaO, and h i g h  feldspar porphyritic  (Chapter  4 ) . No a n a l y s e s o f  Compared t o average v a l u e s  from  3 has a h i g h MgO and CaO, and a low  content.  2  Unit 3 f e l s i c B r i t a n n i a Ridge.  volcanism  i n F i g u r e 3.2, i s l o c a l i z e d  The s u b s p h e r i c a l r h y o l i t e b o d i e s  along  surrounded  by  b r e c c i a s r e p r e s e n t submarine e x t r u s i o n , a l o n g a l i n e a r northwesterly  trend, of f e l s i c  l a v a s on t o b a s a l t f l o w s .  N a 0 v a l u e s may be due t o soda metasomatism. 2  of  the f e l d s p a r p o r p h y r i t i c  rhyolite  i n penecontemporaneous d e f o r m a t i o n r e l a t i o n s h i p s e a s t o f C y r t i n a Creek areas of p o s i t i v e r e l i e f barriers  Continued  High intrusion  i n t o i t s own carapace  and c o m p l i c a t e d  results  stratigraphic  ( F i g . 3.2). U n i t 3 r e p r e s e n t s  on top o f submarine b a s a l t s t h a t c r e a t e  to d e p o s i t i o n o f subsequent m a f i c  flows  i n the e a s t e r n  h a l f of F i g u r e 3.2.  White b l o c k b r e c c i a , u n i t _4, i s d i s t i n c t i v e , dips (unit  50 degrees n o r t h i n s t e e p c o n t a c t with 3) on B r i t a n n i a Ridge;  n o r t h e a s t of C y r t i n a Creek chloritic  ashy m a t r i x  the r h y o l i t e dome  i t a l s o o v e r l i e s C y r t i n a dome  ( F i g . 3.2). White b l o c k s i n a green  form t h i c k l y  b r e c c i a and l a p i 1 1 i s t o n e .  50 m t h i c k , and  bedded and graded  tuff -  The.matrix of f e l d s p a r - r i c h  andesitic  Page  tuff  supports angular  white f e l s i c  and  pumice, f e l d s p a r p o r p h y r i t i c a n d e s i t e , of d i s s e m i n a t e d  galena,  in  Unit  the m a t r i x .  felsic  c r y s t a l ash  Unit  chert blocks and  chert  minor  lapilli.  c h a l c o p y r i t e , s p h a l e r i t e and  4 i s gradational  and  38  Traces  pyrite  occur  to the o v e r l y i n g u n i t  5,  tuff.  4, a t h i c k , s t e e p l y d i p p i n g , non-welded, m a t r i x  p y r o c l a s t i c unit represents  a f a l l o u t deposit  supported  produced by  the  subaqueous e x p l o s i v e d i s i n t e g r a t i o n of a f e l d s p a r p o r p h y r i t i c r h y o l i t e dome ( u n i t 3), s p i n e or l a v a flow as (cf.  F i s h e r and  Felsic interbedded unit,  argillite, to 300  B r i t a n n i a Ridge remnants a l o n g  tuff,  the  with up  lapilli  t u f f and  m t h i c k , mantles f e l s i c I t occurs  south-facing  as  minor'  lapillistone.  domes ( u n i t 3)  This along  scattered erosional  s l o p e of" B r i t a n n i a Ridge west of  more e x t e n s i v e l y e a s t of C y r t i n a Creek where, i t  o u t c r o p s i n c r e e k beds, road 3.2).  u n i t 5_, i s a s s o c i a t e d with  chert,  ( F i g . 3.2).  C y r t i n a Creek, and  (Fig.  water  Schminke, 1984).  c r y s t a l ash  from 50  i t entered  c u t s and  It i s i n contact  cliffs  just  i n the n o r t h e r n  below  treeline  p a r t of F i g u r e  the Mountain Lake g r a n o d i o r i t e where i t i s h o r n f e l s e d  to s e v e r a l hundred meters from the  Resistant pale green. black.  coarse On  tuff  o u t c r o p s of u n i t 5 weather b u f f  fresh surface  Hornfelsed  contact.  members are  the  tuff  i s pale green, pink  purple-black  on  fresh  to or  surfaces  3.2  Page 3 9  due  t o metamorphic b i o t i t e .  T h i c k , massive  ovoid to c i r c u l a r a c c r e t i o n a r y l a p i l l i .  beds c o n t a i n f i n e  Minor  interbeds within  the p a l e c o l o u r e d a s h t u f f u n i t a r e : dark green w e a t h e r i n g tuff  c o n t a i n i n g p y r i t e and e p i d o t e , l a m i n a t e d p i n k - g r e y c h e r t w i t h  minor bedded c h a l c o p y r i t e and p y r i t e ,  chert b r e c c i a with sulphides  s u r r o u n d i n g a n g u l a r fragments,  foliated  matrix supported  lapillistone.  Unit  north  t h i n l y bedded  5 i s massive  unfoliated.  ( F i g . 3.2: s e c t i o n C - C ) . 1  45 degrees  (unit  t h e u n i t d i p s 25 t o 40 degrees  E a s t of C y r t i n a Creek,  3 ) , beds d i p 40 t o 60 degrees  The s e d i m e n t a r y  upward, broken  and bent when viewed  C y r t i n a Creek a t a p p r o x i m a t e l y  n o r t h , and 22 t o  layers of unit from  5 are v i s i b l y  the l o g g i n g road  t h e 1,100 m e l e v a t i o n  g r a d i n g and s o r t i n g and r o c k a s s o c i a t i o n o f t u f f i n t e r b e d d e d c h e r t and a r g i l l i t e  both n o r t h and south a r e p r o b a b l y  magma, as opposed t o l a t e r brecciated  sedimentary  a diatreme  approximately  3.2).  on normal  with  ( F i s h e r and Schminke, 1984).  the r h y o l i t e domes and b r e c c i a s .  penecontemporaneous d e f o r m a t i o n  warped  crossing  (Fig.  5 r e p r e s e n t s a submarine f a l l o u t d e p o s i t , based  5 mantles  mantling  s o u t h on the n o r t h and south f l a n k s o f t h e dome,  respectively.  Unit  b l a c k a r g i l l i t e , and  t o t h i n l y bedded and i s g e n e r a l l y  West o f C y r t i n a Creek,  C y r t i n a dome  dip  mafic  Beds i n the u n i t  that  the r e s u l t o f  through  upwarping and i n t r u s i o n o f  s t r u c t u r a l deformation.  layers of unit  Unit  Deformed and  5 a t C y r t i n a Creek r e p r e s e n t  100 m wide, which has warped and broken  Page 40  the  s e d i m e n t a r y units, and brought a n g u l a r m a f i c  porphyritic  b l o c k s up from t h e u n d e r l y i n g u n i t  represents either a later eruption  continued related  i n t r u s i o n of Cyrtina  and s u l p h i d e b r e c c i a s  hydrothermal s o l u t i o n s  a c t i v i t y during the d e p o s i t i o n sized material  i n unit  2.  This  related  of unit  5.  diatreme  dome ( u n i t 3 ) , o r  t o t h e d a c i t i c dome complex  Bedded s u l p h i d e s i n c h e r t mineralized  feldspar  (unit 9).  are evidence of  to explosive  volcanic  G r e a t e r than 50 % a s h  5 and t h e p r e s e r v a t i o n  of thick  massive  beds of a c c r e t i o n a r y  lapilli  i s evidence of shallow t o p o s s i b l y  subaerial  (Fisher  and Schmincke,  deposition  Mafic l a p i l l i  b l o c k t u f f,  unit  6_, i s r e p r e s e n t e d by  d i s c o n t i n u o u s p y r o c l a s t i c and/or e p i c l a s t i c different and  7.  stratigraphic  l e v e l s within  on  t h e G l o r y Hole Road  of  unit  of u n i t  (unit  2 northwest o f t h e Ridge  exposed a t an e l e v a t i o n  ( F i g . 3.2), o v e r l i e s  7.  East of C y r t i n a slope,  unit  6 i s overlain  10) u n i t s  Beds w i t h i n  o f 850 m  t h e agglomerate member  2; t h e o t h e r two l e n s e s l i e beneath b l e a c h e d m a f i c  south-dipping 2. • U n i t  and from 50 t o 350 m t h i c k ,  f l o w s near t h e t o p o f u n i t  l a v a dome ( F i g . 3 . 2 ) . One l e n s e ,  lenses present at  the mafic flows of u n i t s 2  Three l e n s e s up t o 800 m l o n g ,  occur within  1984).  flows  Creek, o u t c r o p p i n g on t h e  6 o v e r l i e s mafic t u f f  by s e d i m e n t a r y  - breccia  of unit  ( u n i t 8) and p y r o c l a s t i c  o f package 2.  unit  6 are of v a r i a b l e  lenses of t h i s u n i t a l l e x h i b i t  thickness.  The s e p a r a t e •  a s i m i l a r arrangement, which  Page 41  generally crystal are  i n c l u d e s a g r a d a t i o n from a l i t h i c  tuff  graded.  o v e r l a i n by a f i n e  aphyric tuff  Several outcrops d i s p l a y  tuff  and c h e r t .  pumice-rich tops.  to a  The beds  " d o u b l e - g r a d i n g " , where each  i n d i v i d u a l bed i s graded, and t h e e n t i r e sequence These d o u b l e - g r a d e d sequences  - breccia  have c r y s t a l - r i c h  fines  upwards.  bases and  U n i t 6 c o n s i s t e n t l y , d i p s about 30 degrees  southwest; t o p s a r e a l l t o t h e southwest based on g r a d i n g and scouring of f i n e r  units.  W i t h i n the w e s t e r n members o f u n i t framework s u p p o r t e d c o a r s e h e t e r o l i t h i c lower b l o c k y member. the  C o a r s e r dense  6, w e l l tuff  s o r t e d and  - breccia  forms t h e  fragments a r e most common a t  base and pumice i s more common a t t h e t o p .  Clasts  include:  m a f i c and o c c a s i o n a l h e m a t i t e - s t a i n e d b l o c k s , and subrounded v e s i c u l a r m a f i c , a n g u l a r r h y o l i t i c and subrounded In  c o n t r a s t , upper t u f f  cherty  - b r e c c i a members comprise u n s o r t e d and  ungraded, m a t r i x s u p p o r t e d pumice and a n g u l a r r h y o l i t i c and b l o c k s .  lapilli.  The m a t r i x i s f e l d s p a r p h y r i c .  o v e r l a i n by many c o a r s e t o f i n e  lapilli  B l o c k y members a r e  graded t u f f beds  i n a sequence  t h a t becomes f i n e r upwards o v e r 50 m.  E a s t o f C y r t i n a Creek, u n i t lapilli  - tuff  beds  6 c o n s i s t s of a n d e s i t i c  t r u n c a t e d by a h e t e r o l i t h i c  g r a d a t i o n a l t o l a p i l l i s t o n e and t o a n d e s i t i c the  lower t u f f  pyritic,  felsic  tuff  crystal  t u f f and  - breccia tuff.  l o c a l l y t h i n - b e d d e d , l a m i n a t e d , c o n t o r t e d and t u f f and c h e r t beds  slump  i n t o and around  Within  Page 42  occasional  blocks.  The t h i c k h e t e r o l i t h i c b r e c c i a  t r u n c a t e s and  s c o u r s beds o f the f i n e r , u n d e r l y i n g a n d e s i t i c ' t u f f . breccia  i s non-bedded and framework s u p p o r t e d .  closely  packed d i s t i n c t i v e i r r e g u l a r subrounded  porphyritic blocks  amygdaloidal a n d e s i t i c  (up t o 10 cm a c r o s s ) ,  black c h l o r i t i c breccia tuff  20 % f e l s i c  with a mafic feldspar  tuff - breccia  breccia.  L a p i l l i s t o n e , poorly  dominantly of f e l d s p a r subangular f e l s i c  that  l e s s than 10 % f e l s i c  lapilli  1 t o 3 cm wide, This  tuff -  porphyritic  block  m a t r i x , o r an •  s c o u r s down i n t o t h e h e t e r o l i t h i c to well  porphyritic  lapilli  sorted,  i s made up  mafic l a p i l l i ,  and o c c a s i o n a l  Massive f i n e - g r a i n e d  andesitic  felsic  10 % a n g u l a r t o  blocks  (up t o 6 cm  t u f f to c r y s t a l t u f f with  e p i d o t e and m a g n e t i t e p a t c h e s and c l o t s c o n t a i n s o c c a s i o n a l lapilli. lithic  Unit  tuff,  6 i s unconformably o v e r l a i n by f e l s i c  unit  10, e a s t o f C y r t i n a  i r r e g u l a r i t i e s on t h i s " d i p - s l o p e " relationships  within,  very  feldspar  by e i t h e r a d i s t i n c t i v e w h i t e  andesitic  across).  I t contains:  w i s p s , and 10 % m a f i c l a p i l l i .  i s locally overlain  - breccia  blocks,  The t u f f -  Creek.  felsic  crystal  Topographical  make d e t e r m i n a t i o n s o f t h e  and t h e r e l a t i v e p o s i t i o n s  of, units  difficult.  The  western members o f u n i t  pyroclastic and  6 represent  f l o w s , based on l i t h i c ,  subaqueous  c r y s t a l and pumice  fragments  the c h a r a c t e r i s t i c lower b l o c k y members o v e r l a i n by  d o u b l e - g r a d e d sequences.  D o u b l e - g r a d i n g s i g n i f i e s contemporaneous  subaqueous v o l c a n i s m w i t h d e p o s i t i o n  from t u r b i d i t y f l o w s and n o t  Page 43  just  s l o u g h i n g o f f oversteepened  ( c f . F i s k e and Matsuda  slopes of a volcano  (1964) i n F i s h e r and Schmincke, 1984).  great v a r i e t y of l i t h i c is  pyroclastic  fragments mixed w i t h pumice and c r y s t a l s  s u g g e s t i v e o f the s h a t t e r i n g of a r u b b l y v o l c a n o .  pyroclastic  flows were e r u p t e d  fans between b a s a l t i c basaltic  The  and d e p o s i t e d  e i t h e r as submarine  f l o w s , o r as aprons o f f the f l a n k s o f  e a s t e r n member o f u n i t  6 i s largely epiclastic.  pyroclastic units.  Lithological  submarine d e p o s i t i o n and/pr reworking  Altered  It  i n a shallow  basalt, unit  underlying  s i m i l a r i t i e s o f c o a r s e r members  fragments w i t h i n u n i t s 5 and 6 suggest  were d e p o s i t e d  The  w e l l s o r t e d c l a s t i c member o f w a t e r l a i n  reworked v o l c a n i c l a s t i c s c u t s down i n t o and s c o u r s  and  The  r i d g e s o r f e l s i c domes.  framework s u p p o r t e d ,  and  The  unit  6 may  represent  o f members o f u n i t  5 that  t o s u b a e r i a l environment.  1_, i s the uppermost u n i t o f package 1 ,  forms the t o p 150 t o 350 m o f the t h i c k mafic  flow  sequence.  i s b e s t exposed on G l o r y Hole Road a t about 875 m e l e v a t i o n ;  a l s o outcrops  along  B r i t a n n i a Ridge d i r e c t l y  open p i t , and on the s o u t h - f a c i n g C y r t i n a Creek  ( F i g . 3.2).  surface. Creek.  n o r t h of the V i c t o r i a  s l o p e of B r i t a n n i a Ridge west of  I t i s massive t o p i l l o w e d , and  c h a r a c t e r i z e d by a p a l e green c h l o r i t i c abundant c h l o r i t i c  weathered s u r f a c e ,  amygdules, and a " b l e a c h e d "  This "bleached" At the top of u n i t  unit  it  i s not present  grey-green  fresh  e a s t of C y r t i n a  7.the p i l l o w l a v a s a r e i n c r e a s i n g l y  Page  vesicular  and  contain  more i n t e r b e d d e d h y a l o c l a s t i t e  F i n e - g r a i n e d grey c h e r t  infills  Subspherical pillows, s e l v a g e s and Pillow The  r i m s , but  1 to 2 m long,  contain  massive  range i n s i z e from 1 mm 1 mm and  a c r o s s , but  can  chloritic  be  from 1 to  as  pillows.  lack well  developed  % amygdules  t o p s are  chlorite,  throughout.  t o the  southwest.  s u r r o u n d e d by  basalt  3 mm  sausseritized.  the  larger 8 mm  quartz  may  Unit  white,  and/or q u a r t z , elongated.  are  They  average, c h l o r i t e amygdules  calcite  amygdules average about 2 C a l c i t e amygdules have  centers.  up  to  15  % plagioclase  P h e n o c r y s t s are  7 p l o t s as  i s a l k a l i n e compared to u n i t Spilitization  On  i n diameter.  contain  in length.  calcite,  occasionally  t o 4 mm.  b i g as  rims and  Altered  rocks.  layers.  chert.  round, sometimes i r r e g u l a r , and  2  involving  almost  ( F i g . 4.3) the  and  addition f o r the  phenocrysts  completely  a c a l c - a l k a l i n e arc  seawater a l t e r a t i o n i s r e s p o n s i b l e unit  t o 20  i n " b l e a c h e d " o u t c r o p s are  Amygdules composed of  mm  up  morphology v a g u e l y i n d i c a t e s  pillows  are  between the  44  most  basalt,  which  calk-alkaline  of N a 0 d u r i n g 2  a l k a l i n e composition  of  7.  Spilitized  f l o w s of u n i t  7 represent deposition  subaqueous environment than f l o w s of  unit  2 based on  i n a shallower the i n c r e a s e  Page  i n amygdules, h y a l o c l a s t i t e s and  pillows  ( F i s h e r and  1984).  These upper p i l l o w e d  flows u n d e r l i e ,  overlie  felsic  - breccia  t u f f and  tuff  f l o w u n i t s w i t h pumice and the  unit.  w i t h and  Unit  felsic  volcanic  d i s t r i b u t i o n of  these l a t e r  positive relief  created  3.2.3  degrees and breccias basalt  facing  and  southwest.  agglomerate are  flows.  Local  - breccia,  and  tuffaceous  units  facing  lapilli  may  subaerial in  Ash  within  contemporaneous  The by  character the  area  and of  r h y o l i t e domes.  i n package 1 form a p a n e l 1,400  m a f i c f l o w s a t the  This  activity.  f l o w s were a f f e c t e d the  Ridge.  interbedded  of b a s a l t  and  Summary, Package 1  Seven u n i t s  tuff  by  Schmincke,  interfinger,  Britannia  b l o c k s are  7 represents extrusion  succeeding f e l s i c  on  45  the  Over 1,000 gradational  m thick dipping  m of m a f i c f l o w s , to s p i l i t i z e d ,  r h y o l i t e domes w i t h r e l a t e d t u f f up  top  of  t o 400  the  consistently  i s consistent  m thick  Excellent  indicates  t o p s are  w i t h p i l l o w morphology.  auto-breccia,  grading t o the  eastern  possibly  developed  r h y o l i t e domes.  lowermost s t r a t i g r a p h i c package i n the  a r e a of F i g u r e  3.2.  The  lower c o n t a c t  is  to form the  top  part  of  i s u n d e f i n e d but the  the  Accretionary  positive relief  h a l f of package 1 above the  Package 1 i s the  interpreted  a r e a of  in  the  southwest.  r e p r e s e n t a f a c i e s change t o a s h a l l o w e r and  environment where an  flow  pillowed  i n t e r f i n g e r with  package.  45  thick,  study  package 1  moderately  Page 46  dipping is and  b a s a l t i c p i l e on Goat Ridge d e s c r i b e d  intruded  and o v e r l a i n by a d a c i t i c  It  dome complex and sedimentary  p y r o c l a s t i c r o c k s o f package 2.  The  altered basalts, c l a s s i f i e d  slightly  as i s l a n d - a r c b a s a l t s , a r e  a l k a l i n e due t o enrichment i n Na20.  compared t o most c a l c - a l k a l i n e s u i t e s from package 1 a r e c h e m i c a l l y samples from Sky P i l o t the map a r e a Na-  by Heah (1982).  and C o - P i l o t  ( F i g . 3.1). R h y o l i t e  low and high  (Chapter 4 ) . B a s a l t  i n d i s t i n g u i s h a b l e from  and M g - r i c h compared to f e l s i c  Variably  They a r e CaO-poor samples  basalt  Mountains d i r e c t l y  n o r t h of  samples from C y r t i n a dome a r e r o c k s i n the o t h e r  packages.  K 0 v a l u e s o c c u r i n the mafic r o c k s from 2  package 1.  Sulphide m i n e r a l i z a t i o n package 1. chert  Disseminated  sulphides  i n flow top b r e c c i a s ,  particularly  occurs at several  horizons  occur within  massive white  f r a c t u r e s and s u r r o u n d i n g  a t the top o f the package w i t h i n  within  pillows,  the b l e a c h e d u n i t 7.  Gossans a r e common a l o n g the margins of the massive r h y o l i t e domes and  within  felsic  Age  cherty  tuffs  interbeds  i s undefined  f o r package 1.  basalts  Mesozoic Coast P l u t o n i c basalts  that  interbedded  within  K-Ar d a t e s of 90.5_f  3.0 Ma  that o v e r l i e the domes.  from the f r e s h e s t  the  and b r e c c i a s  (Chapter 5) have been r e s e t  intrusions.  are undefined.  Rb-Sr d a t e s  No f o s s i l s were found  by the  (Chapter 5)  for  i n the s t r a t a .  Page 4 7  I n t e r p r e t e d t o u n d e r l i e and be i n t r u d e d by d a c i t e s o f package 2, package 1 i s c o n s i d e r e d  t o be t h e o l d e s t package i n the map  area.  3.3 PACKAGE 2, "MINE" SEQUENCE  3.3.1  Introduction  Package 2, c h a r a c t e r i z e d by a b a s i n a l f a c i e s , and  a thick p y r o c l a s t i c blanket,  covers  to the B r i t a n n i a  most o f t h e c e n t r a l p a r t o f F i g u r e  the B r i t a n n i a open p i t s map area,  -  across  % sedimentary  The  500  The package i s and 20  rocks.  Feldspar  in total  porphyritic dacite  thickness  (unit  crystal  lithic  tuff  (unit  sulphide d e p o s i t s are hosted  w i t h i n rocks  quartz-sericite  12).  schist  (unit  facies  10).  300 t o 500 m (200 t o  Massive  strongly a l t e r e d to  Black' a r g i l l i t e  west o f the l a r g e d a c i t e complex.  from 500  9) forms a dome  The dome complex i s surrounded by a t h i c k apron  m) of u n s o r t e d  outcrops  of the western  30 % massive i n t r u s i o n s and f l o w s ,  complex of m a s s i v e , b r e c c i a t e d and t u f f a c e o u s thick.  I t extends from  edge o f the map.  f i v e u n i t s o f package 2 v a r y  to 1,200 m.  orebodies,  s l o p e o f B r i t a n n i a Ridge and a l o n g  t o the e a s t e r n  p y r o c l a s t i c rocks,  3.2.  (Jane B a s i n ) , i n t h e c e n t e r  the southern  F u r r y Creek v a l l e y half  host  a dome complex  ( u n i t 8)  3.3.2  Unit  and  ash  tuff,  u n i t 8_, o c c u p i e s  B r i t a n n i a Ridge i n the Jane B a s i n T h i s u n i t , 500  the  tuff  t u f f a t the  - b r e c c i a , greywacke and  slope  of  a t the  top.  pyritic  Figure  base, but  Interbeds  of  chert occur  grades tuff,  within  argillite.  Monotonous, f i n e - g r a i n e d b l a c k around more r e s i s t a n t p a l e r and Argillite  1 to 4 m t h i c k w i t h  bottoms, are p o o r l y felsic  clasts  sorted with  s u p p o r t e d by  range from c r y s t a l s t o 10 contains  argillite  , coarser  i s massive t o t h i n l y bedded and  Interbeds,  massive l i t h i c  sorted, u n s t r a t i f i e d pale, grey-green t u f f the  the n o r t h  a t the w e s t e r n edge of  m thick, i s a r g i l l i t e  upward to d o m i n a t e l y f e l s i c felsic  48  Descriptions  Argillite  3.2.  Page  flat 50  a black cm  and  weathers r e c e s s i v e l y  fragmental well  tops and % angular  units.  foliated.  rounded feldspar  phyric  f i n e - g r a i n e d matrix.  blocks.  One  c r y s t a l - r i c h matrix.  Fragments  volcaniclastic  v e s i c u l a r pumiceous b l o c k s  beds and  load-casted  Very  interbed  in a  poorly  fine-grained,  p a l e green c h e r t beds are common a t  top of u n i t 8, which d i r e c t l y  u n d e r l i e s the  B r i t a n n i a open  pits.  Argillite  beds d i p 45 degrees southwest and  cleavage dips  50  to 75 degrees southwest; bedding - c l e a v a g e r e l a t i o n s h i p s i n d i c a t e a gently 3.2.  northwest-plunging a n t i c l i n a l  a x i s to the  north  Small " s " drag f o l d s i n f i n e - g r a i n e d , grey t u f f  of  beds  Figure support  Page 49  this  structural interpretation.  contorted  and deformed, which may l o c a l l y  d e f o r m a t i o n b u t more g e n e r a l l y Flame s t r u c t u r e s , g r a d i n g t o p s a r e t o t h e southwest. foliation,  Unit dacitic  8 represents  argillite  and l o a d i n g  a sedimentary basin  rained  veins,  parallel  to th  change i n c h a r a c t e r  flows,  on t h e f l a n k o f a  from monotonous  t u r b i d i t e s , upward t o ash f l o w  i n t o the basin  turbidity  s t r u c t u r a l deformation.  Numerous q u a r t z  reflects deposition  increasing d a c i t i c volcanism.  eruption  s o f t sediment  a l l consistently indicate  I t changes c h a r a c t e r  with f e l s i c  This  during  reflects  represent  beds a r e  c u t the a r g i l l i t e .  complex.  chert.  These f i n e - g r a i n e d t u f f  Subaerial  i s represented  black  t u f f s and i n a basin  o r submarine  by t h e i n t e r m i t t e n t  and beds o f pumice, c r y s t a l s and ash t h a t  i n t o the b a s i n .  Dacite,  u n i t 9, c o n s i s t s o f a t h i c k  (150 t o 350 m) i n t r u s i v e  e x t r u s i v e dome complex w i t h m a s s i v e , b r e c c i a t e d and tuffaceous Unit  9 i s divided (1)  pits, unit  f a c i e s , located  i n t h e west c e n t r a l p a r t o f F i g u r e  3.2  i n t o two main members:  the " P i t dome", p o o r l y  exposed on. the  east w a l l of the  c o n s i s t i n g o f an a l t e r e d , l a r g e l y i n t r u s i v e body  underlying  8 ( F i g . 3.2: s e c t i o n A-A'), and (2)  cliffs  the " V i c t o r i a dome complex" which c o n s i s t s o f prominent of massive d a c i t e over 40 m h i g h  Britannia  Ridge above t h e V i c t o r i a  on t h e south s l o p e o f  open p i t ( F i g . 3.2: s e c t i o n  Page 5 0  B - B ) , and t u f f 1  the  - b r e c c i a along B r i t a n n i a Ridge.  The d i a m e t e r o f  P i t dome i s a p p r o x i m a t e l y 0 . 5 km; t h e V i c t o r i a dome d i a m e t e r  i s 1 . 5 km.  A z o n i n g o f s i m i l a r f a c i e s around a c e n t r a l massive c o r e i s by t h e two members o f u n i t 9 .  exhibited feldspar  igneous t e x t u r e d  lapilli  tuff  matrix, gradational  and a s h t u f f .  Breccia  around t h e P i t dome  2 0 m t h i c k and i s o v e r l a i n by a c h e r t  is  s u r r o u n d e d by a h e t e r o l i t h i c p y r o c l a s t i c b r e c c i a  over a 2 0 0 m t h i c k n e s s  to tuff  horizon.  g r e y - g r e e n t o g r e y - b l u e , and c o n t a i n s  V e s i c l e s and amygdules o f q u a r t z , Rarely  v e s i c l e s contain  The"margins o f t h e domes l o c a l l y  flow-banded.  zeolites,  quartz-feldspar  At t h e edge o f V i c t o r i a dome p h e n o c r y s t s  z e o l i t e are present.  and  buff-green, i s  The p h e n o c r y s t s a r e v a r i a b l y a l t e r e d t o s e r i e i t e and  clay minerals.  copper.  gradational  5 t o 15 % p l a g i o c l a s e  p h e n o c r y s t s i n a f i n e t o medium g r a i n e d  aligned.  V i c t o r i a dome  - b r e c c i a and t o t u f f .  M a s s i v e d a c i t e weathers b u f f - w h i t e t o s p e c k l e d  groundmass.  with a  outward t o t u f f  is  are  massive  p o r p h y r i t i c c o r e s a r e rimmed by a u t o b r e c c i a  siliceous, breccia,  Localized  locally  c h l o r i t e and  traces  of native  are aphyric,  vesicular  Samples from P i t dome l a c k amygdules and  but a r e marked by c o m p l e t e l y  s a u s s e r i t i z e d phenocrysts  i n an a l t e r e d m a t r i x .  A carapace, 20 t o 80 m t h i c k , of angular f e l d s p a r  phyric  Page  blocks  in  a  siliceous  Plagioclase matrix can  is  phenocrysts  irregularly  contain  pyrite  is  includes thickly  chlorite  present angular  bedded,  Tuff includes  matrix  -  in  fine  breccia,  angular  to  rhyolite.  Thinly  be  the  matrix.  in  slightly  of  subrounded  bedded  saussuritized  the  -  and  are  This  to  and  -  it  disseminated  locally  gradational  feldspar  fragments,  blocks  tuff,  plagioclase  quartz-rich; Minor  is  The  to  a  breccia.  dacitic  sulphide  l a p i l l i  and  autobreccia  tuff  angular  cores.  broken.  foliated.  a r g i l l i t e  addition  l a p i l l i ,  massive  medium g r a i n e d  and  .oriented  of  and  angular  blocks, and  flow-banded  tuff  phenocrysts  phyric  with  (1  to  randomly  4 mm)  overlie  breccia.  Samples  from  calc-alkaline to  unit  9 plot  andesite  typical  to  9 has  high  T i G ^ and  more  mafic  than  the  to  dacitic  alkali  values.  4.5).  Victoria  in  the  composition  rhyodacite  Cascade  unit  andesitic  to  the  autobreccia  framework-supported  mafic  Compared  this  fragments  subrounded  tuff  in  surrounds  51  dacites  MgO.  Victoria  The dome  (Chapter (Irvine  Pit  member.  composition with values  dome  has  from  unit  range  a  dome  from  dacitic  range  4:  and  Fig.  altered  4.1).  Barager,  1971),  is  more  altered  Pit  dome  has  relatively very  of  high  l o w CaO to  composition with  very  and  an and low  medium  (Fig. to  high  values.  A K - A r date  9  (Chapter  5) ' o f  79.5  _+ 2 . 9  Ma  indicates.  Page 52  a r e s e t m i d - C r e t a c e o u s d a t e which c o u l d Plutonic  intrusions  (c_a. 100 Ma) o r more l i k e l y ,  undocumented i n t r u s i v e o r d e f o r m a t i o n a l  Unit  9 i s i n t e r p r e t e d as t h e e a s t e r n  to southeasterly  trending  dacitic  to a l a t e r  event.  p o r t i o n of a l a r g e  l a v a - dome i n t r u s i o n  e x t e n d s a l o n g B r i t a n n i a Ridge b o t h e a s t open p i t s  be r e l a t e d t o Coast  ( F i g . 3 . 1 ) . The d a c i t e s  by McCullough  9, w i t h i n  Figure  on t h e west s e c t i o n o f  structures  (1968) t o be d o m i n a n t l y  3.2, c o n t a i n s  caused by magma c o n t a c t i n g  but s t i l l  The c o a r s e r  i n t e r p r e t e d as a lower l e v e l  grained  m a t r i x w i t h unbroken p h e n o c r y s t s i s found  cooling  center  with d e v i t r i f i e d explosive  glass  extrusion.  The c o a r s e r  i n t h e slow  containing  i n a f i n e t o medium-grained  and fragments o f a r g i l l i t e  matrix  reflect  C h e m i c a l , t e x t u r a l and s p a t i a l d i s t i n c t i o n  between the two members i n d i c a t e t h a t i n t o two u n i t s .  Pit  intrusion.  V i c t o r i a dome f a c i e s  eruptions  tuffaceous  grained  abundant fragmented p l a g i o c l a s e  zones and  wet sediments  f l o w - b a n d i n g , v e s i c l e s and a t h i c k  o f a dome.  Unit  dome complex.  o f phreatomagmatic  consolidated  ( F i s h e r and Schmincke,,1984).  breccia--is  intrusive.  w i t h / and rimmed by b r e c c i a  fragments o f d a c i t e , a r e t y p i c a l  dome--lacking  3.2, were  t h e v a r i a t i o n s i n t e x t u r e s and  e x p e c t e d i n an i n t r u s i v e - e x t r u s i v e  Oval bodies a s s o c i a t e d  that  and west o f t h e B r i t a n n i a  B r i t a n n i a R i d g e , west o f t h e open p i t s and F i g u r e described  east  unit  9 might be s e p a r a b l e  Page 53  Crystal  lithic  tuff,- ' u n i t j_0, i s a t h i c k , p a l e ,  r o c k c h a r a c t e r i z e d by d i s t i n c t i v e green forms a s t r i k i n g l y entire and  l e n g t h and  white  c o n s i s t e n t band 200  It  m thick across pale, mottled,  the green  h o s t t o many o r e b o d i e s .  company r e p o r t s (Hodgson and  Burton,  t o t h i s d i s t i n c t i v e u n i t as "GFBx", a green  b r e c c i a , and  "GMS", g r e e n m o t t l e d  p r o p o r t i o n s of fragments and  their  occur w i t h i n t h i s d i s t i n c t i v e l y 40 degrees  steepens  The  mottles.  o u t c r o p s a r e b e s t exposed i n the open p i t s , where they  P r e v i o u s mine and  dips  t o 500  c e n t e r of F i g u r e 3.2.  are the most abundant r o c k type and  referred  chloritic  pyroclastic  t o 60  Outcrops  southwest.  schist. size,  1966)  fragmental  Variations in colour, composition,  mottled u n i t .  In the open p i t s  and  sorting  Generally, unit the d i p  10  locally  degrees.  weather b u f f t o r u s t y p a l e green  s u r f a c e s range from  and  a w h i t i s h pink to green-blue  white. or  Fresh  grey-green  background m o t t l e d by d a r k e r green  chloritic  outcrops  s t e p s w i t h v a r y i n g c o l o u r and  grain  form  size.  5 m high topographic Green c h l o r i t i c  m o t t l e s commonly weather  w i t h r e s p e c t t o the more r e s i s t a n t  Unit by  randomly o r i e n t e d c l a s t s and  primary  siliceous  10, most o f t e n unbedded and  e l o n g a t e d or f l a t t e n e d foliation  i n one  fragments.  recessively  matrix.  unsorted,  crystals.  Large  is characterized  Green fragments may  be  d i r e c t i o n , which might d e f i n e a  normal t o h o r i z o n t a l d e p o s i t i o n a l  members or those w i t h more c h l o r i t i c m o t t l e s tend  flow.  t o be  Altered  slightly  Page 54  s c h i s t o s e w i t h micaceous m i n e r a l s  marking a p r e f e r r e d o r i e n t a t i o n .  Near t h e t o p , t h e u n i t i s commonly s t r o n g l y where s u l p h i d e  gradational  i n t o a c o a r s e lower member  t o a f i n e r upper member.  The lower t u f f  thickly  bedded, framework s u p p o r t e d , and p o o r l y  angular  to subangular f e l s i c  fragments. chloritic  lithic  fragments, g r a d i n g  sorted;  - tuff  t o an upper c r y s t a l  - breccia i i t contains  with,wispy  lapilli  by wispy f e l d s p a r p o r p h y r i t i c  fragments i n a f e l d s p a r p h y r i c m a t r i x c o n t a i n i n g  - tuff,  chloritic  l e s s than 10 %  fragments.  Distinctive, rock.  that  fragments and minor g r e e n  The b r e c c i a g r a d e s t o a l a p i l l i  which i s c h a r a c t e r i z e d  lithic  o r sheared  m i n e r a l i z a t i o n i s present.  Some o u t c r o p s can be s e p a r a t e d is  sericitized  wispy c h l o r i t i c  fragments form up t o 1 0 % o f t h e  They may be a n g u l a r t o subrounded t a b u l a r o r d i s c - s h a p e d  with d e l i c a t e t a i l s .  The fragments range i n s i z e from 0.5 t o 10  cm and tend t o be equant i n c o a r s e r fragments, t y p i c a l l y  hourglass  tuff  - breccias.  shaped w i t h f r a y e d  The g r e e n  ends, a r e  composed of a l i g n e d m u s c o v i t e , c h l o r i t e and v a r i a b l e amounts o f quartz.  They o c c a s i o n a l l y a r e molded around s i l i c e o u s fragments  or c r y s t a l s .  The contains  f i n e - g r a i n e d m o t t l e d and o f t e n g l a s s y m a t r i x 15 %, and may c o n t a i n  feldspar c r y s t a l s .  generally  up t o 30 %, randomly o r i e n t e d  white  In t h i n s e c t i o n , t h e groundmass i s v a r i a b l y  Page 5 5  t e x t u r e d , a p h a n i t i c t o c o a r s e g r a i n e d , and s t r e a k e d due t o variations  i n q u a r t z t o mica r a t i o s .  o v a l s a r e d e f i n e d by c h l o r i t e . (An-jo_35> c r y s t a l s  form  D e l i c a t e curved  Broken o r bent  clusters  l i n e s and  plagioclase  i n the groundmass.  Randomly o r i e n t e d , unbroken f e l d s p a r c r y s t a l s a r e r e p l a c e d by quartz  i n subrounded q u a r t z a g g r e g a t e s .  are s e p a r a t e d from locally  The rounded  aggregates  each o t h e r by micaceous m a t e r i a l and a r e  porphyritic.  Subordinate  t o t h e c r y s t a l s and green  fragments p r e s e n t pale grey,  from  0 t o 10 %.  fragments a r e l i t h i c  They a r e d o m i n a t e l y  subrounded, and s p h e r i c a l .  R a r e l y these  white t o  lithic  fragments a r e a n g u l a r b l a c k c h e r t , l a r g e v e s i c u l a r b l o c k s , b l o c k s of  bedded t u f f , o r s u l p h i d e  The  a l t e r a t i o n of u n i t  a chemical  NaO and CaO (Chapter  crystal  t o accompanying s u l p h i d e v o l c a n i c r o c k s in- the  e n r i c h e d i n 1^0 and MgO, and d e p l e t e d i n  4: F i g s .  lithic  subaqueous p y r o c l a s t i c eruption related  related  Compared t o o t h e r f e l s i c  map i t i s s i g n i f i c a n t l y  the t y p i c a l  10, h o s t t o many o r e b o d i e s , may p r o v i d e  index o f a l t e r a t i o n  mineralization.  Felsic  fragments.  tuff  4.7, 4.5, 4.6, and 4.10).  i s a non-welded t o p a r t i a l l y  flow, r e s u l t i n g  from  a powerful p h r e a t i c  t o the d a c i t i c dome complex.  l a c k o f s o r t i n g and bedding,  welded  The t u f f d i s p l a y s  and f l a t t e n e d  pumice  Page 56  fragments i n a c r y s t a l - r i c h g l a s s y m a t r i x sheet.  o f an i g n i m b r i t e  The g r e e n fragments appear t o be fiamme.  Undeformed  s i l i c e o u s fragments might have been s o l i d a t t h e time o f deposition.  Perlitic  volcanic glass 1984).  cracks are i n d i c a t i v e of h y d r a t i o n of  (Freidman and Smith, 1 958 _in F i s h e r and Schmincke,  Different  c o o l i n g u n i t s may be r e p r e s e n t e d  by v a r i a t i o n s '  i n c o l o u r , r e s i s t a n c e t o w e a t h e r e i n g and d e g r e e s o f c o m p a c t i o n . Varying separate  Ash  p r o p o r t i o n s o f fragments and c r y s t a l s ash f l o w s w i t h v a r y i n g  tuff,  discontinuous 10.  argillite  Argillite  compositions.  and c h e r t , u n i t  sedimentary u n i t  i n d i c a t e a s e r i e s of  1 1 , i s a thin  interbedded  in,"and  and c h e r t i n t e r b e d s i n the mine p i t s  range i n t h i c k n e s s up t o 60 m.  Pyritic,  overlying, unit ( F i g . 3.2)  p a l e g r e e n c h e r t beds  t h i c k e n t o as much as 15 m as c o n c o m i t a n t by b l a c k a r g i l l i t e along  strike.  A fine  thins  t u f f member, up t o 200 m t h i c k a t the t o p o f  package 2, o v e r l i e s V i c t o r i a dome and i s exposed a t t h e base o f the  s l o p e south  argillites  o f F u r r y Creek  ( F i g . 3.2; s e c t i o n B - B ) .  c o n t a i n i n g abundant p y r i t e  1  i n t h e Jane B a s i n  Black ( F i g . 3.2)  a r e u s u a l l y c l o s e t o where massive and bedded s u l p h i d e s were removed from t h e open  Unit  11 i s t h i n l y  pits.  bedded, d i p s 45 degrees southwest a t t h e  western edge o f F i g u r e 3.2, and steepens t o 78 degrees o v e r l y i n g the d a c i t i c into  dome.  Beds w i t h i n p y r i t i c  lenses p a r a l l e l  argillite  to a nearly v e r t i c a l  are transposed  pervasive  foliation.  Page  Unit settling of  unit  11  r e p r e s e n t s a,pause i n e x p l o s i v e a c t i v i t y ,  of f i n e ash and 10 ash  quiescence  flows.  sediments,  between and  and  57  a  after deposition  I t r e p r e s e n t s a b a s i n or p e r i o d of  w i t h i n o r d u r i n g which massive s u l p h i d e s may  have  accumulated.  Quartz-sericite hydrothermally  (chlorite) schist,  altered  felsic  r o c k , i s host t o a l l d e v e l o p e d  crystal  unit  lapilli  t u f f and  sedimentary  The  schist,  o u t c r o p s on Empress Creek  a l o n g the F u r r y Creek v a l l e y a t the base of the n o r t h - f a c i n g  s l o p e on  Unit  the s o u t h s i d e of F u r r y Creek  12 ranges  weathering, to  primarily a  Britannia orebodies.  b e s t exposed i n the B r i t a n n i a open p i t s , and  12,  and  i n t h i c k n e s s from  ( F i g . 3.2).  60  t o 300  v a r i e s on f r e s h s u r f a c e from  a y e l l o w i s h - g r e y where i t i s a l t e r e d .  v a r i e t y of v a r i a b l y a l t e r e d equivalent crystal  to u n i t s  lithic  u n i t obscures common.  Ten  10 and  tuff.  sediments and 11.  The  Alteration  the o r i g i n a l  The  m,  i s rusty  p a l e and dark  u n i t c o n s i s t s of a  tuffaceous rocks  major rock type  i s an  i n the uppermost 100  rock t y p e .  green  Quartz  m of  v e i n s and  L o c a l l y a l t e r a t i o n cuts across l i t h o l o g i c  altered the  gashes a r e  boundaries.  major o r e b o d i e s of v a r i o u s s i z e s were d e s c r i b e d w i t h i n a  p a n e l of h i g h l y a l t e r e d and dips approximately mine t e r m i n o l o g y  fissile  45 degrees  referred  r o c k , up t o 450  southwest  m thick,  that  (Payne e t a_l. , 1 980).  t o the p a n e l of f i s s i l e  r o c k s as  the  Old  Page 58  " B r i t a n n i a Shear Zone". units  10,  11  and  Orebodies extend  12  This panel  i s g e n e r a l l y c o i n c i d e n t with  i n package 2 ( F i g . 3.2:  s e c t i o n A-A').  from an e l e v a t i o n of 1,000  the  lowest  sea  l e v e l . G l o r y h o l e s from the d e p o s i t s are a l i g n e d a l o n g  saddle  working  level  m i n the Jane B a s i n  (5,700 f o o t mining  The  orebodies  compared by  were,crude l e n s e s of semi-massive to massive  ( F i g . 3.2:  S u l p h i d e mineralogy  erratic  galena,  P y r r h b t i t e was  quartz  a'  section A-A ). 1  was  fairly  chalcopyrite, sphalerite,  c o n f i n e d to h i g h grade copper m i n e r a l i z a t i o n . i n s c a t t e r e d narrow v e i n s and Quartz and  number toward o r e b o d i e s . muscovite, c h l o r i t e ,  12 r e p r e s e n t s  Sulphides  " l a t e " high  q u a r t z - p y r i t e veins  Non-metallic  a n h y d r i t e and  hydrothermal a l t e r a t i o n deposits.  be c o n s i s t e n t w i t h  t e n n a n t i t e , t e t r a h e d r i t e and p y r r h o t i t e .  veinlets.  Unit  may  stringer,  i n the B r i t a n n i a o r e b o d i e s  c o n s i s t i n g of p y r i t e ,  occurred  d e s c r i b e d as  bedded by Payne e t a_l.(1 980)  to the southwest  constant,  sediments, which were  Payne e t a_l. (1980) to Kuroko - type m i n e r a l i z a t i o n .  massive, and  Gold  pyritic  g e n e r a l morphology of o r e b o d i e s  facing  a rusty  p i t i n the F u r r y Creek v a l l e y ( F i g .  l a y e r s , and . s t r i n g e r d e p o s i t s and  The  m below  t h a t c u t s from Jane B a s i n , a c r o s s B r i t a n n i a Ridge a t  Empress Creek, to V i c t o r i a 3.2).  l e v e l ) at 400  to  a linear, related  minerals  barite  grade  increase in include:  (Payne e_t a_l. , 1 9 8 0 ) .  semi-conformable zone of to v o l c a n o g e n i c  are b e l i e v e d to be mainly  massive  sulphide  exhalites deposited  Page 59  by  hydrothermal s o l u t i o n s r e l a t e d t o f e l s i c  specific  horizons  revealed  several horizons  within  i n a complex v o l c a n o s e d i m e n t a r y p i l e .  package 2.  from p r o d u c t i v e  of m i n e r a l i z e d  Orebodies represent  hydrothermal centers  highly  3.3.3  chert--at  least  five  a s e r i e s of stacked  12.  lenses  Deformation  a f f e c t e d h y d r o t h e r m a l l y a l t e r e d rock  schistose  Mapping  l o c a l i z e d a l o n g a l i n e a r zone  marked now by the a l t e r e d rock o f u n i t preferentially  volcanism at several  r o c k s between competent v o l c a n i c  producing  blocks.  Summary, Package 2  ' F i v e u n i t s i n package 2 form a p a n e l o f rock 170 t o 850 m t h i c k c o n s i s t i n g o f a c e n t r a l d a c i t e dome complex and a western basinal tuff,  f a c i e s ; both a r e c o v e r e d by a b l a n k e t  t u f f , and minor a r g i l l i t e  from 150 t o 700 m. southwest. units,  Generally,  and c h e r t  that varies  package 2 f a c e s  crystal  i n thickness  and d i p s  45 degrees  W i t h i n t h e l e s s competent a r g i l l a c e o u s and p y r o c l a s t i c  p a r t i c u l a r l y on the f l a n k s o f massive domes, d i p s  s t e e p e n t o 70 degrees southwest. turbidite  beds i n a r g i l l i t e ,  t o p s a r e t o the southwest. consistent  may  in felsic indicate  Vergence i n minor f o l d s a l s o i s A l l o f package 2 appears t o be r i g h t  southwest.  B r i t a n n i a orebodies, contained lenses,  L o a d i n g and g r a d i n g  p y r o c l a s t i c s and b r e c c i a s  with t h i s f a c i n g .  s i d e up and f a c i n g  mining  of f e l s i c  within  seventeen  distinct  a r e h o s t e d by a v a r i e t y o f t u f f a c e o u s o r  Page  sedimentary schist.  altered  to q u a r t z - s e r i c i t e  1980).  " o r e " , and  as bedded z i n c - b a r i t e  Crude r e c o n s t r u c t i o n , from  (1980),  massive and volcanic  "ore"  suite  Altered  composition  ( F i g . 3.2;  the proposed  section  from  Table  southwest f a c i n g  and  K2O  and  1  r o c k s i n the  d e p l e t e d i n CaO  K-Ar  data  related  (Chapter  + 3 Ma  age  of 163  5) from  4).  map  The  rocks  compared t o normal  +_ 54 Ma  t o the Coast  3.3.4  Contact  5:  f o u r samples p r o v i d e  Range, or a l a t e r ,  r e s p o n s i b l e f o r the B r i t a n n i a  isochron with  (Chapter  that represents either  event  The  f o r the  A-A ).  samples i n Package 2 d e f i n e an  to E a r l y Cretaceous  date of 81.4  intrusion  to  rocks.  5.3).  average  (stringer,  a n d e s i t e t o r h y o d a c i t e (Chapter  Rb-Sr v a l u e s from a Jurassic  Payne e t  f e l d s p a r p o r p h y r i t i c v o l c a n i c r o c k s range i n  are e n r i c h e d i n MgO subalkaline  (Payne e t a l . ,  of zoned s u l p h i d e orebody morphology bedded) s u p p o r t s  and  o l d mine s e c t i o n s and  Package 2 i s composed of the most a l t e r e d area.  (chlorite)  . S u l p h i d e s o c c u r as c h a l c o p y r i t e - p y r i t e massive  stringer  al.  rocks v a r i a b l y  60  resetting  c o n t a c t between package 1 and  an  deformational  2  package 2 s t r i k e s and  dips less  than  northwest  a c r o s s the upper t h i r d  of F i g u r e 3.2,  degrees  the s u r f a c e i t i s marked by massive t o  On  by  Shear Zone.  between Packages 1 and  southwest.-  an  45  Page 61  thinly  bedded  c h e r t and c h e r t b r e c c i a i n c l u d i n g s u l p h i d e  disseminations  and fragments.  of mafic  i n the B r i t a n n i a Ridge s t r a t i g r a p h y .  flows  p r o j e c t i o n of the c o n t a c t  s e c t i o n A-A'), and may  prospects  limit  At d e p t h ,  i n t e r s e c t s the bottom of the #8  ( l o c a t e d e a s t o f F i g u r e 3.2) 3.2:  T h i s c o n t a c t marks the upper  orebody  and the West V i c t o r i a o r e b o d i e s ( F i g . c o i n c i d e with  the F u r r y and Robinson  beneath overburden i n the F u r r y Creek v a l l e y .  Basalt i s  shown as the f o o t w a l l t o d e p o s i t s on the o l d mine s e c t i o n s . t h e r e f o r e might be s i g n i f i c a n t surface  i n s e v e r a l outcrops  t h a t s u l p h i d e s are p r e s e n t  along  The c o n t a c t between packages  this  i n the c e n t r a l map  unconformity  on the  contact.  1 and'2 changes  from  conformable i n the northwest, t o a nonconformable contact  It  a r e a / to an e r o s i o n a l  e a s t of the C y r t i n a Creek f a u l t .  apparently  intrusive angular  The change i n  c h a r a c t e r from submarine d e p o s i t i o n i n the northwest to p o s s i b l y s u b a e r i a l e r o s i o n i n the s o u t h e a s t related 3.2)  r e f l e c t s changes  to the f e l s i c dome complexes.  the c o n t a c t s s e p a r a t e s  From west  in facies  to e a s t ( F i g .  u n i t s 8 and 7, 8 and 6, 9 and 7,- 10  and 7, 10 and 6, and 10 and 2.  A complex  the  transition  to a s u b a e r i a l environment  the  l e n g t h of the map  u n i t s and  from a submarine  v o l c a n i c environment and  p r o v i d e s one e x p l a n a t i o n  the o n l a p p i n g  r e l a t i o n s h i p of package  across  f o r the m i s s i n g 2 with package  The d e p o s i t i o n of u n i t s 7 and 8 e a s t of the C y r t i n a Creek f a u l t prevented barrier  by r h y o l i t e domes of p o s i t i v e  to the submarine  flows.  relief  which c r e a t e d a  1. was  Page  A conformable c o n t a c t exists  i n the  Here, the and  n o r t h w e s t e r n c o r n e r of F i g u r e  contact  submarine ash  (unit  r e l a t i o n s h i p between the  separates a l t e r e d pillowed flows  At  880  basalt  and  fragments i s o v e r l a i n by  southwest. argillite that  flow with p i l l o w s  a l o n g an  o v e r l i e s the and  dips  argillite  southwest and  are  c a s t bottoms, and basis  and  the  in  of p a r a l l e l  s i m i l a r and  West of the  Dacite mafic and  bedding, c o n s i s t e n t  gradational contact,  flows  at  include  Cyrtina  section  1,300  character  m e l e v a t i o n on  angular blocks  of  the  chert  contact,  - breccia  (unit  Turbidite  dip  beds  45  degrees rounded  package c o n t a c t .  f a c i n g t o the of the  load On  southwest,  pyroclastic units  here, i s considered  conformable  sequence.  ( F i g . 3.2:  section B-B ), 1  the  2 i s i n t e r p r e t e d as i n t r u s i v e .  southern slope ridge.  feldspar  Dacite  6)  fragments s i m i l a r  ( u n i t 9) o u t c r o p s south of a l t e r e d and  ( u n i t 7) a l o n g the  road,  degrees  felsic  to the  Hole  dipping  30  7)  argillite  rusty  e x c e l l e n t grading,  tops p a r a l l e l  between packages 1 and breccia  by  (unit  with a  t u r b i d i t e interbeds  characterized flat  1  argillite,  southwest.  composed of  a submarine d e p o s i t i o n a l  contact  black  degrees t o the  The  both packages, the  within  Glory  surrounded by  i r r e g u l a r surface  ( u n i t 8) are  t o those i n u n i t 6.  the  the  d o u b l y graded m a f i c t u f f  20  A-A ).  flows  F i v e hundred meters s o u t h e a s t a l o n g the  faces  within  (section  basalt  m e l e v a t i o n on  a silicified  steep f o l i a t i o n ,  packages  ( u n i t 6) of package 1 from b l a c k  8) of package 2.  sulphide  3.2  two  62  bleached  of B r i t a n n i a breccia  p o r p h y r i t i c andesite  Ridge  fragments (units 2  Page  and/or  7),  dacite,  quartz  and  sulphide  fine-grained blocks  of  support  matrix  andesite  the  position  pumice,  tuffs  and  contains  disseminated  and  package  cherty  l a p i l l i ,  intrusive  of  bedded  feldspar  fragments nature  2 and  of  the  from the  crystals;  5)  units  contact  of  and  facing  angular  the  sulphides.  the  southwest  (unit  siliceous  Angular  package  the for  63  1  overlying the  two  packages.  Package  1 is  unconformity and  felsic  unit  strike  fault.  (units  2 and  6)  (unit  of  package  2.  10)  Cyrtina  with  -  west  dome,  excellent  Epiclastic  east  and  dip  strikes  degrees  south  to  interpreted accompanying  as  an  erosional  quartz-sericite  contact  (Fig. 3.2:  of  of  The  -  the  almost  the  10  schist  and  1 underlie contact,  crystal  beds  cut  and  dip  to  the  are  scour  interpreted  at  with  dips  this  point  in  and  as  underlying units  southeast contact  breccia,  north-south  6 that  Unit  surface.  flows  i n d i c a t i n g tops  unit  blankets  angular Rhyolite,  mafic  Below  south.  an  package  grading  northwest  southwest.  and  strike  breccias  pyroclastic flow,  1 and  the  Creek  Cyrtina  breccias  package  along  2 by  5),  west  subaqueous  package  4 and  southwest. 5  the  (units  overlying  25 d e g r e e s  of  from  3,  tuff  5,  east  tuffs  epiclastic lithic  separated  about  unit a  of 35  is  Sulphide mineralization is  sections  present C-C'and  at  several  D-D ). 1  places  Page 64  3.4 PACKAGE 3, "HANGINGWALL"  3.4.1  SEQUENCE  Introduction  Package 3 i s c h a r a c t e r i z e d by f e l s i c  massive and ash f l o w s  o v e r l a i n by t h i c k s e d i m e n t a r y u n i t s and m a f i c  intrusions.  Package  3 i s the l e a s t a l t e r e d and most p o o r l y d e f i n e d o f a l l t h r e e sequences. on the  I t covers  the "hangingwall  t h e bottom t h i r d  slide"  of F i g u r e  i n t h e Jane B a s i n  3.2,  outcropping  ( F i g . A . 1 ) , and on  s t e e p l y - d i p p i n g n o r t h - f a c i n g s l o p e o f Downing Ridge a l o n g t h e  F u r r y Creek v a l l e y , e a s t t o t h e Vancouver Watershed boundary. lower c o n t a c t  i s placed  quartz-sericite  schist  somewhat a r b i t r a r i l y (unit  12), s e p a r a t i n g  package 2 from " f r e s h " u n i t s o f package 3. undefined,  Six  and l i e s  the  felsic  sequence.  vertical  The upper c o n t a c t i s  Units d i p shallowly  20 t o 45 degrees  Mapping was  w i t h i n the lower 200 m o f the package, f o c u s i n g on  flow  u n i t s exposed i n the open p i t s and a t the  Watershed boundary. generally  " a l t e r e d " units of  a combined t h i c k n e s s o f over 800 m, make up  southwest, and f a c e c o n s i s t e n t l y southwest. concentrated  above t h e  beyond t h e map t o t h e s o u t h .  u n i t s , forming  the h a n g i n g w a l l  The  Upper u n i t s a r e p o o r l y d e f i n e d .  is difficult, north  Access  e s p e c i a l l y a t poor exposures on the n e a r l y  f a c e o f Downing Ridge  ( F i g . 3.2).  Page 6 5  . 3.4.2  Unit  Descriptions  Crystal tuffaceous 2.  It  lithic unit  tuff,  largely  i s separated  schist  and  fine  varies  in thickness  hanging w a l l the  to  unit  the  from u n i t  rhyolite Figure unit  ash  3.2  14  up  to  150  by  m and  Fairview  face  flows  altered  of  and  argillites.  holes,  b e l o w and  the  Crystal  tuff  13  f a u l t on  Empress g l o r y  a blocky,  package  Unit  section  F u r r y Creek at  t o be  in  ( F i g . 3.2:  lithic  white  quartz-sericite  Downing, R i d g e , and  D-D').  i s believed  #5  10  o u t c r o p s above a  open p i t  the  south of  (section  and  10  g r e e n and  from u n i t  t h i c k l y b e d d e d t u f f s and  i n the  north  i s a mottled  indistinguishable  s o u t h e a s t e r n edge o f  base of  13,  eastern  the  A-A'), at  the  above edge  of  i s gradational  unwelded  on  f a c i e s of  to  that  unit.  Outcrops of surface. The  unit  the  from  top;  Minor  from  unit  analyses  for  4.7).  K 0, 2  to  13  unit  are 10  from u n i t  Na 0, 2  at  CaO  are  p a l e g r e e n on  d i s t i n c t i v e dark green  unsorted.  interbeds of  unit  similar  and  by  tuff - breccia  although  domain  w e a t h e r w h i t e and  i s . l a r g e l y unbedded and  Samples  10,  13,  T h e y are' c h a r a c t e r i z e d  gradational near  unit  the  Rarely  base to  t u f f and  a  finer l a p i l l i  and  i n outcrop appearance. 13  and  plot MgO  within  the  (Chapter.4:  fiamme.  i t is  argillite  r e l a t i v e l y fresh  fresh  tu  occur.  unaltered In  normal Figs.  -  4.4,  contrast  to  subalkaline 4.5,  4.6  Page 66  Feldspar  porphyritic rhyodacite, unit  dipping resistant  creamy white o u t c r o p s  edges of F i g u r e 3.2, on the h a n g i n g w a l l an area  south  14, forms s h a l l o w -  a t t h e e a s t e r n and -western i n the open p i t s ,  o f F u r r y Creek a t t h e Watershed boundary.  i s c h a r a c t e r i z e d by massive c e n t e r s  interbedded  edge of F i g u r e  3.2.  green and white  Minor b l a c k  argillite,  unit.  f l o w s , up t o 75 m t h i c k , o u t c r o p  a t the e a s t e r n  The flows d i p 20 degrees and f a c e southwest.  These flows a r e flow-banded The  14.  t u f f and c h e r t o c c u r w i t h i n t h i s  Massive f e l s i c  I t ranges i n  Locally a distinctive,  l a y e r e d member forms t h e t o p of u n i t and  U n i t 14  i n t i m a t e l y i n t e r c a l a t e d and  surrounded by p o r p h y r i t i c and pumiceous b r e c c i a s . t h i c k n e s s from 100 t o 500 m.  and i n ,  (10 mm), v e s i c u l a r and s p h e r u l i t i c .  bases of the flows a r e c h a r a c t e r i z e d by f l o w - b r e c c i a and  v e s i c l e s are concentrated  a t t h e tops o f f l o w s .  o u t l i n e s minor f o l i a t i o n and s p h e r u l i t e s .  Chlorite  locally  F i n e - g r a i n e d p a l e green  fragments, 2 t o 10 cm a c r o s s , make up 5 % o f the u n i t . D i s t i n c t i v e green and white l a y e r s on average 5 cm t h i c k , a t t h e top of the u n i t , have a l t e r a t i o n might r e p r e s e n t d e v i t r i f i c a t i o n  Thin  elongated.  fills  (rods and c i r c l e s )  that  o f a welded u n i t o r flow.  s e c t i o n s r e v e a l 10 to 15 % p l a g i o c l a s e p h e n o c r y s t s and  amygdules w i t h  replaced  textures  c h l o r i t e centers  surrounded by q u a r t z  are s l i g h t l y  The p l a g i o c l a s e c r y s t a l s a r e s a u s s e r i t i z e d , and a r e  by f i n e - g r a i n e d c h l o r i t e ,  s e r i c i t e and e p i d o t e .  f r a c t u r e s and forms amygdules.  The p h e n o c r y s t s and  Quartz  Page 67  amygdules form a p r e f e r r e d o r i e n t a t i o n , p r o b a b l y p a r a l l e l t o depositional  flow.  P y r o c l a s t i c b r e c c i a s c o n t a i n i n g pumice b l o c k s , on average and up t o 16 cm l o n g , s u r r o u n d t h e massive g r e e n and white f i n e - g r a i n e d sulphide  Unit in the  lapilli  fiamme and  a t the western  tuff  edge o f F i g u r e 3.2.  u n i t has d i s t i n c t i v e g r e e n and white l a y e r s ; p o r p h y r y by 100 m o f f i n e l y  The l a y e r s a r e p a r a l l e l  s e d i m e n t a r y u n i t , which southwest  Pale  matrix.  a more homogeneous f e l d s p a r p o r p h y r y 200 m t h i c k  the open p i t s ,  argillite.  in  chloritic  flows.  occur w i t h i n a f e l d s p a r p o r p h y r i t i c  14 forms  from the massive  the  lapilli,  felsic  6 cm  i t i s separated  bedded t u f f and  t o bedding  d i p s 23 degrees  The t o p o f  i n the  southwest.  Tops a r e t o  based on e x c e l l e n t examples o f g r a d i n g and l o a d i n g  the f i n e r g r a i n e d t u f f s and a r g i l l i t e s .  Samples from u n i t rhyolite  i n compoaition  enrichment  (Chapter 4 ) .  compared t o normal  demonstrated  Unit  14 p l o t as u n a l t e r e d c a l c - a l k a l i n e d a c i t e t o  by samples  14 i s t h i c k e r ,  13, but i s s i m i l a r  2  subalkaline rhyolite, i s  609 and 185 ( F i g s .  4.5, and 4.7).  l e s s e x t e n s i v e and more massive  i n composition; i t i s gradational  more f r a g m e n t a l members a t the margins more c h l o r i t e  S l i g h t N a 0 and MgO  from d e v i t r i f i c a t i o n  and base.  than  unit  t o i t i n the  Unit  and a l t e r a t i o n a l o n g  14 c o n t a i n s fractures.  P a g e 68  Unit  14 r e p r e s e n t s  subaqueous  felsic  a sequence  ash flows.  The f l o w s a r e r e c r y s t a l l i z e d a n d  g l a s s has a l t e r e d t o c h l o r i t e gradational  t o fragmental  Na-enrichment  1962).  Unit  indicate  h i twater  t h e unwelded  Interbedded a r g i l l i t e  and a r g i l l i t e ,  i sinterbedded  contains  have  minor  fragments.  The f i n e l y  w i t h i n u n i t 14  and t u f f  i s subaqueous.  u n i t 1 5 , weathers r u s t y grey t o black, u n i t s 13 a n d 1 4 .  interbeds of chert, siliceous  and c o a r s e r  (Dickinson,  base and margins o f  within, or overlies,  greywacke,  of explosions  ( F i s h e r and Schmincke,  t h e welded p y r o c l a s t i c flow d e p o s i t  Ash t u f f and  The m a r g i n s ,  may b e d u e t o s o d a - m e t a s o m a t i s m  13 r e p r e s e n t s  massive flows.  and q u a r t z .  members, a r e t h e r e s u l t  where t h e p y r o c l a s t i c f l o w s 1984).  o f massive t o p o s s i b l y welded  tuff,  crystal  beds w i t h a c c r e t i o n a r y l a p i l l i bedded  t o laminated  Unit  tuff,  and c h e r t  u n i t ranges i n t h i c k n e s s  f r o m 2 5 t o 1 0 0 m.  Beds d i p 20 t o 47 d e g r e e s s o u t h w e s t , w i t h  grading  tops t o t h e southwest.  indicating  Black, contains  finely  bedded  occasional  argillite  tuffacequs  i sfoliated,  interbeds.  c l o s e l y - packed c h e r t y and w h i t e l a p i l l i . contains  fine-grained felsic  subrounded  Unit  t o subangular  15 r e p r e s e n t s  a  s i l i c e o u s and  Lapilli  - tuff  Green  chloritic  beds o r o c c a s i o n a l  blocks o f  contains tuff  rhyolite.  pause  and  the  15  final  settling  of  felsic  Page  tuff after  felsic  volcanism.  d e p o s i t i o n between r h y o l i t e  Argillite, that covers  16,  the map  shallow  submarine  f l o w s a t the edges of F i g u r e  i s a monotonous sequence over  the bottom of F i g u r e  l o c a t i o n s over Basin,  unit  It reflects  area:  3.2.  69  I t outcrops  3.2.  400  m thick  in several  (1) on B r i t a n n i a Ridge west of Jane  (2) i n the F u r r y Creek r i v e r bed,  and  (3) a l o n g much of  Downing R i d g e .  The and  a r g i l l i t e weathers r u s t y grey  purple-black.  siltstone, up  and  to l a p i l l i  pyrite  unit  southwest. present. the  slip  i s fine-grained  I t c o n t a i n s minor i n t e r b e d s of a r g i l l a c e o u s  p a l e grey  t u f f beds 1 t o 5 m t h i c k w i t h  s i z e t h a t i n c l u d e o c c a s i o n a l pumice.  is rarely  The  to b l a c k ,  fragments  Disseminated  present.  is finely  bedded and  d i p s g e n e r a l l y 33  degrees  A strong, pervasive, northwest-striking f o l i a t i o n i s This nearly v e r t i c a l  plane  f o l i a t i o n dips northeast  f o r the h a n g i n g w a l l  slide  ( F i g . A.1)  and  d i s a s t e r o u s Jane S l i d e of the e a r l y n i n t e e n hundred's. b l o c k s of i n t r u s i v e d a c i t e s i t p r e c a r i o u s l y on north-dipping  Unit entire and  16  plane  above the open p i t s  this  ( F i g . 3.2:  the d i s a p p e a r a n c e  forms  the Large  steep s e c t i o n A-A').  r e p r e s e n t s q u i e t submarine d e p o s i t i o n a c r o s s  l e n g t h of the map,  and  the  marking a h i a t u s i n v o l c a n i c a c t i v i t y  of an a r e a of p o s i t i v e r e l i e f  i n the  eastern  Page 70  map  area.  Andesite  tuff  - breccia, unit  weathering outcrops F u r r y Creek.  17,  at the western end  of F i g u r e 3.2,  lapilli  - tuff  The  u n i t was  area.  uppermost s t r a t i g r a p h i c package i n F i g u r e 3.2, m of s h a l l o w l y d i p p i n g f e l s i c  t u f f s , b r e c c i a s and a n d e s i t e . - The  lithic  t u f f , and  t u f f and  black a r g i l l i t e .  e x c e l l e n t g r a d i n g and  B a s a l b r e c c i a s and  rhyolite  14 support  flows of u n i t  Disseminated unit  s u l p h i d e s occur  15, and  i n the  by  are  Units in  Gradations  loading in unit  are to the southwest.  13,  intruded  o v e r l a i n by t h i c k  package 3 c o n s i s t e n t l y d i p s h a l l o w l y southwest. and  ash  f l o w s , l o c a l i z e d at the edges of the map,  sedimentary u n i t s of f e l s i c  13,  c o n s i s t s of  flows, welded  sedimentary r o c k s , o v e r l a i n and  g r a d a t i o n a l to c r y s t a l  unit  f o l l o w i n g the  Summary, Package 3  l e a s t 800  unit  epidote  not c l o s e l y examined, but  a c t i v i t y which dominated, most of the map  The at  Minor  C h l o r i t e and  i s b e l i e v e d to r e p r e s e n t a p e r i o d of mafic v o l c a n i s m  3.4.3  and  i n a tuffaceous matrix.  i n t e r b e d s are p r e s e n t .  a l t e r a t i o n commonly o c c u r s .  felsic  west of  T h i s u n i t of unknown t h i c k n e s s , i s massive  c o n t a i n s 5 % f e l d s p a r phenocrysts dacitic  c o n s i s t s of dark green  15,  in  i n d i c a t e tops  v e s i c u l a r tops  i n the  this facing.  within altered  felsic  fragmental margins of  unit  t u f f s of 14.  Page 71  Quartz v e i n s c u t t i n g u n i t s a t the base of package 3 c o n t a i n visible  disseminated  s u l p h i d e s and  yield  h i g h Au v a l u e s .  west s e c t i o n of B r i t a n n i a R i d g e , the D a i s y  showing o c c u r s  rocks considered  p a r t of package 3 w i t h i n t h i s  classification.  Although  and 2,  tuffaceous rocks similar  potential  l i t h o l o g i e s and  the B r i t a n n i a o r e b o d i e s  a l t e r a t i o n may  the  within  stratigraphic  package 3 l a c k s the e x t e n s i v e  that host  On  altered i n package  indicate'favourable  f o r s i m i l a r massive s u l p h i d e deposits..  U n i t s i n package 3 a r e r e l a t i v e l y of packages 1 and  2.  Values  u n a l t e r e d - - u n l i k e most u n i t s  from samples i n package 3 f a l l  within  the u n a l t e r e d normal s u b a l k a l i n e domain f o r c a l c - a l k a l i n e d a c i t e to r h y o l i t e  (Chapter  higher  values  than  Package 3, 2,  Na 0 values  from the  2  (Chapter  3.4.4  Contact  The  i n t e r p r e t e d to o v e r l i e  5: T a b l e  5.2)  between Packages 2 and  and  (unit  are  the upper u n i t s of package area.  The  one  Rb-Sr  data age.  3  package 3 s t r i k e s  d i p s 45 degrees southwest, p a r a l l e l  i s l o c a t e d above a d i s c o n t i n u o u s  schist  flows  f o r package 3 does not d e f i n e an  c o n t a c t between package 2 and  to southeast  felsic  f o r normal s u b a l k a l i n e r o c k s .  i s the youngest sequence i n the map  point  It  4).  h o r i z o n of  12), marking the upper l i m i t  northwest  to b e d d i n g .  quartz-sericite  of major a l t e r a t i o n  that  accompanies s u l p h i d e m i n e r a l i z a t i o n of the B r i t a n n i a o r e b o d i e s .  Page 72  The  contact  relatively The  separates  " f r e s h " , but l i t h o l o g i c a l l y  contact  with,  " a l t e r e d " r o c k s o f package 2 from t h e  i s poorly defined across  and may c o i n c i d e  Z i n c and Empress o r e b o d i e s ,  workings and t h e Watershed showing  The  ( F i g . 3.2).  v i s i b l e on t h e w a l l s o f open p i t s  Jane B a s i n , and c u t s a c r o s s  B r i t a n n i a Ridge j u s t  o f exposed p i t s down Empress Creek  Britannia  Fairview  south  ( F i g . 3.2).  i n the  o f the r u s t y On the  s e c t i o n ( F i g u r e 3.2: s e c t i o n A-A') massive w h i t e  feldspar porphyritic rhyolite  (unit  14) i s s e p a r a t e d  from the  Z i n c bedded massive s u l p h i d e s and b l a c k a r g i l l i t e  zone marked by m y l o n i t i z e d c r y s t a l  quartz-sericite parallel  lithic  by a  tuff,  s c h i s t , and b a s a l t dykes t h a t were i n t r u d e d  t o the f o l i a t i o n .  A prominent f a u l t generally locally  the Fairwest  c o n t a c t between " a l t e r e d " and " f r e s h " r o c k s o f the two  packages i s d i s t i n c t l y  saddle  At the  the c o n t a c t between packages 2 and 3 i n t e r s e c t s t h e t o p  of t h e d e v e l o p e d F a i r v i e w  i n the Jane B a s i n  c o i n c i d e n t with  the contact  c u t s u n i t s 13 and 14.  porphyritic, in  t h e map area  o r be o f f s e t by, f a u l t s o f unknown movement.  surface,  fault  s i m i l a r u n i t s o f package 3.  spherulitic  between packages 2 and 3,  M a s s i v e white o u t c r o p s  rhyolite  sharp c o n t a c t above sheared  ( F i g . 3.2), which i s  (unit  of f e l d s p a r  14) o f package 3 o u t c r o p  r u s t y r o c k s o f package 2 on: (1)  the n o r t h w e s t e r n w a l l o f the Jane open p i t , (2) t h e s o u t h w e s t e r n w a l l of the F a i r v i e w  Z i n c p i t , and (3) the s o u t h e r n  w a l l o f the  Page 7 3  Fairview of t h i s and  p i t above t h e Gordon G a l l u p h o l e . fault,  Below the p r o j e c t i o n  u n i t 14 c o n f o r m a b l y o v e r l i e s i n t e r b e d d e d  c h e r t , which host massive and d i s s e m i n a t e d  argillite  sulphides  dipping  45 d e g r e e s southwest on t h e s o u t h w e s t e r n w a l l o f t h e B l u f f  glory  hole.  The  contact  southern  southeast  t h e Jane B a s i n  i s p r o j e c t e d across the  w a l l o f t h e E a s t F a i r v i e w open p i t and down t h e  south-facing  s l o p e of B r i t a n n i a Ridge southwest o f t h e #5 and  Empress g l o r y h o l e s . rusty c r y s t a l overlying,  lithic  I t separates t u f f with  lithologically  q u a r t z - s e r i c i t e s c h i s t and  green mottles  (unit  s i m i l a r , b u t w h i t e w e a t h e r i n g u n i t 13.  Complex s t r a t i g r a p h i c r e l a t i o n s h i p s i n the map are w e l l exposed i n t h e open p i t s .  Complications  severe  a l t e r a t i o n of u n i t s to q u a f t z - s e r i c i t e  across  unit contacts,  f i n e - g r a i n e d rocks  (2) t r a n s f o r m a t i o n  the contact  area result  schist,  from: (1  sometimes  o f bedding i n  by s t e e p l y d i p p i n g p e r v a s i v e  numerous f a u l t s o f unknown movement offset  10) from t h e  foliation,  (3)  t h a t may c o i n c i d e w i t h o r  between packages 2 and 3, and (4) i n t r u s i o n o f  l a t e r d a c i t e and a n d e s i t e  dykes i n t o t h e a l t e r e d deformed  fault  zone.  Along the F u r r y Creek v a l l e y , of Downing Ridge placed  on the p o o r l y  ( F i g . 3.2), t h e c o n t a c t  somewhat a r b i t r a r i l y  exposed  north-fac  between t h e packages i s  above o u t c r o p s  of q u a r t z - s e r i c i t e  Page  schist. along  The  c o n t a c t runs p a r a l l e l  the v a l l e y .  The  i n a c c e s s i b l e steep  t o , and  s t r a t i g r a p h y on  (1) at the w e s t e r n end the R i d g e , and  exposed,  has  The  been o f f s e t  contact  (2) 1.1  km  (Fig.  the c o n t a c t  F u r r y Creek.  i s d i s p l a c e d by  outcrops  a g a i n on  E a s t of  faults  east  Watershed boundary a t the e a s t e r n margin of the  of  Furry  Vancouver  map.  At the Watershed boundary, the c o n t a c t between packages 2 3 separates  felsic  shallow-dipping  crystal  sericitized, v e i n s and  The  tuff  perhaps welded u n i t  facing (unit  sheared  as minor  14).  outcrops  with  The  c o n t a c t between packages 2 and  southwest.  t h a t has  contact  a  similar  similar  i s marked  Lithological  3 i s an a l t e r e d pyroclastic  by  of u n i t s from l a r g e l y  f a c i n g of u n i t s a c r o s s U n i t s 10 and  horizon  rocks  s i m i l a r i t i e s between the  package 2 t o s e d i m e n t a r y i n package 3, and  interpretation.  that i s  disseminations.  the g r a d a t i o n a l n a t u r e  d i p and  10)  and  sulphides occurring i n quartz  w i t h i n a c o n f o r m a b l e sequence of f e l s i c t o the  (unit  t o the southwest, from a l i t h o l o g i c a l l y  but more m a s s i v e , and o r i e n t a t i o n and  lithic  the  Fairwest  i n t o the  the road a t the  by  outcrops:  (3) above the F a i r w e s t workings south  of C y r t i n a Creek and  Creek v a l l e y and  faults.  of the Downing R i d g e ,  confluence 3.2)  o f , F u r r y Creek  the p o o r l y  s l o p e i s l a r g e l y unknown and  numerous n o r t h t o n o r t h e a s t - t r e n d i n g  along  south  74  this 13 a r e  pyroclastic  the c o n s i s t e n t  contact, support virtually  this  younging packages, in stike,  Page 7 5  i n d i s t i n g u i s h a b l e — separated quartz-sericite  o n l y by d i s c o n t i n u o u s  horizons of  schist.  " A l t e r e d " and " f r e s h " r o c k s may not be a v a l i d major  division  because, s e v e r a l a l t e r e d h o r i z o n s e x i s t w i t h i n t h e B r i t a n n i a Ridge stratigraphy. difficult  Poor exposure and s t u c t u r a T c o m p l e x i t i e s make i t  to confidently project this d i v i s i o n  stratigraphic  l e v e l a c r o s s t h e e n t i r e map.  a t t h e same  The c o n t a c t does mark  an upper l i m i t o f major a l t e r a t i o n a s s o c i a t e d t h e B r i t a n n i a orebodies.  Smaller  accompanying do o c c u r  l o c a l i z e d exposures o f s i m i l a r a l t e r a t i o n  s u l p h i d e m i n e r a l i z a t i o n o f unknown economic  stratigraphically  higher  less extensive p y r o c l a s t i c  units.  3.5  potential  i n package 3 w i t h i n s i m i l a r but  INTRUSIVE ROCKS  3.5.1  Introduction  Numerous r e l a t i v e l y stratified  f r e s h dykes and i n t r u s i o n s c u t a l t e r e d  r o c k s o f t h e t h r e e packages i n F i g u r e 3.2.  dykes and i n t r u s i v e b o d i e s o f d a c i t i c (unit  19) c o m p o s i t i o n  (unit  18) and a n d e s i t i c  i n s i z e , b u t common a c r o s s  i n c l u d e d on F i g u r e A.1.  sills  (unit  The l a r g e s t  have been i n c l u d e d on F i g u r e 3.2.  dykes, l e s s s i g n i f i c a n t are  with  Numerous  the map a r e a ,  L a r g e u n a l t e r e d d a c i t i c dykes and  18) a r e most e v i d e n t  i n t h e Jane B a s i n open p i t s ( F i g .  Page  3.2).  Relatively  f r e s h a n d e s i t i c dykes and  commonly t r a c e a b l e f o r more than 800  m i n l e n g t h , of d i o r i t i c ,  (unit Figure  18) 3.2  compositions  100  m.  andesitic  that outcrop  sills  (unit  19)  76  are  I n t r u s i v e b o d i e s , 200 (unit  19)  and  dacitic  i n the s o u t h w e s t e r n  w i t h i n package 3 were not examined c l o s e l y .  to  c o r n e r of More  d e t a i l e d mapping i s r e q u i r e d t o r e s o l v e c o m p l i c a t e d i n t r u s i v e - a n d extrusive relationships that e x i s t . these  The  genetic relationship  i n t r u s i o n s w i t h the v o l c a n i c s u i t e and  of  the p l u t o n s i s  unknown.  Coarse-grained completely The  surround  p l u t o n s of the Coast the s t r a t i f i e d  Mountain P l u t o n i c Complex  r o c k s of the t h r e e packages.  Mountain Lake p l u t o n o c c u p i e s most of the n o r t h e a s t e r n c o r n e r  of F i g u r e 3.2. the south and  Furry pluton intrudes Britannia  i s p r e s e n t a l o n g the s o u t h e a s t e r n edge of the  I n t r u s i v e c o n t a c t s i n the s o u t h e r n been taken Labs,  pendant r o c k s t o  p a r t of F i g u r e 3.2  have  from maps i n o l d company r e p o r t s ( B r i t a n n i a  Progress Reports,  1 96'4 t o 1.971; J e n n i n g s  and  Lamprophyre dykes up t o 1 m wide a r e p r o b a b l y Pleistocene Garibaldi volcanics. n o r t h w e s t e r l y t r e n d and  The  intrude late f a u l t s .  incorporate coarse-grained plutonic have not been i n c l u d e d on F i g u r e  fragments.  3.2.  Dykes  largely  Research  Payne, 1 974).  related  dykes have an  map.  to  irregular locally  These s m a l l dykes  3.5.2  Dykes and  Rhyolite wide cut  package•1.  p i n k to b u f f  Euhedral quartz phenocrysts broken, s l i g h t l y a l t e r e d in a microgranulitic structures. unaltered trends  a c r o s s much of  (<  10  the  dacite,  18  r a d i a l dyke swarms.  zone.  with a n d e s i t i c  to d i s t i n g u i s h  top  of  (up  centers  to 25  %)  and  occur  dykes p l o t as  normal  Fe-enrichrnent  unit  1 8,  occurs i n large  a r e a , at the  extrusive  of  package  dykes i n t r u d e d dykes might  ( u n i t 19)  and  may  3.  into a represent  Along Downing Ridge the  intrusives 9;  top  bodies  dacite  is  represent  here, more d e t a i l e d mapping i s phases from f r a g m e n t a l  margins  bodies.  Green and  fresh  m  spherulitic  These c r o s s c u t t i n g  dome complexes s i m i l a r to u n i t  distinctly  phenocrysts  forms c r o s s c u t t i n g  synvolcanic,  g r a i n e d and  %) w i t h d e v i t i f i e d  southwestern map  fault  intrusive  to 50  4).  pre-existing  of  25  a t the  r o c k s w i t h both Fe-poor and  open p i t s u n i t  required  units  groundmass w i t h r e l i c t  subalkaline  associated  felsic  Samples from t h e s e - r h y o l i t e  (Chapter  porphyritic,  dykes weather p a l e p i n k to w h i t e .  feldspar  Feldspar porphyritic  In the  feldspar  r h y o l i t e l a v a dome and The  77  Intrusions  dykes, q u a r t z and  the  Page  white weathering d a c i t e  c o n t a i n s up unaltered  c h a r a c t e r of  to  30  i s massive, f i n e to medium  % feldspar  compared to d a c i t e s the  phenocrysts. of  mine dykes i n d i c a t e s  unit  9.  intrusion  The The  unit  is  relatively  took  place.  Page  a f t e r a l t e r a t i o n a s s o c i a t e d w i t h m i n e r a l i z a t i o n and  Unit 3.2) and  18 samples from  deformation.  the "mine dykes" i n the Jane B a s i n ( F i g .  p l o t w i t h i n the u n a l t e r e d domain f o r c a l c - a l k a l i n e o u t l i n e an o r i g i n a l  content  (Chapter  4).  dykes are C a O - r i c h and are r i c h  i n SiC>2 and  A n d e s i t e and packages 1 and  K0  Compared t o t y p i c a l Cascade r h y o l i t e s  the  K 0-poor.  i n A l 0 and  w i t h widths  from  2  19,  K0 2  (Chapter  fine-  forms c r o s s c u t t i n g dykes w i t h i n  t o medium-grained a n d e s i t e dykes weather  Dykes have sharp c o n t a c t s and l e n g t h s from  o c c u r a l o n g the l e n g t h of F i g u r e 3.2,  v o l c a n i c s and  dykes.  form  P l a g i o c l a s e phenocrysts  200  20  are s i m i l a r content.  minor  tholeiitic  domain  Relatively  They  (Chapter  t r e n d of  are  Chlorite  and  unaltered andesite plot within  4).  to normal s u b a l k a l i n e rock c o m p o s i t i o n s  Samples o u t l i n e an F e - r i c h  m.  rhyolite  % of the r o c k ,  i n t r u s i v e s d e f i n e a c a l c i c magmatic t r e n d , and 1  t o 500  are commonly s a u s s e r i t i z e d .  e p i d o t e are p r e s e n t up to 5 % each.  are exposed  most commonly a s s o c i a t e d  w i t h m i n e r a l i z e d massive f e l s i c  Miyashiro s'(1974)  cutting  ( F i g . 3.2).  10 t o 50 m and  randomly o r i e n t e d , and  4).  l a r g e coarser grained i n t r u s i v e bodies  package 3 on Downing Ridge  dark g r e e n i s h brown.  2  Compared to t y p i c a l d a c i t e s they  2  Diorite, unit  Green, massive,  rhyolite  c a l c i c magmatic t r e n d w i t h a medium  low  2, and  78  iron  Chemically with  low  they K0  enrichment.  2  Page  D i o r i t e b o d i e s , f i n e - t o medium-grained on Downing Ridge large c l i f f s  t h a t a r e s p e c k l e d green  weather b u f f t o p a l e g r e e n . (up t o 20  %) and  biotite  q u a r t z , c h l o r i t e and  Large  and  white  epidote.  v a r i a b l e amounts of q u a r t z and  phenocrysts  i n a groundmass w i t h  These d i o r i t i c  bodies contain  p l o t w i t h i n the u n a l t e r e d domain  f o r c a l c - a l k a l i n e a n d e s i t e t o d a c i t e (Chapter have a normal s u b a l k a l i n e c o m p o s i t i o n  4).  Chemically  w i t h medium K 0 2  They f o l l o w an Fe-poor Cascade t r e n d of i r o n  Unit  form  i n c o l o u r , and  broken p l a g i o c l a s e  (up t o 15 %) o c c u r  79  they  content.  enrichment.  19 c o n s i s t s of r e l a t i v e l y u n a l t e r e d dykes, compared  to  the a l t e r e d v o l c a n i c s they c u t . The  c o a r s e r g r a i n e d member of U n i t  19  related  i n package 3 i s a p l u g , p o s s i b l y  granodiorite pluton. i n t r u s i v e event, Britannia  3.5.3  Ridge  This unit  represents a l a t e r mafic  which s i g n a l l e d  t h a t e n c l o s e v o l c a n i c and south  P l u t o n i c Complex  unit  to g r a n o d i o r i t e , and  20,  forms l a r g e p l u t o n i c  sedimentary  ( F i g . 3.2).  The  complex c o n s i s t s of commonly f o l i a t e d  q u a r t z monzonite  the  suite.  G r a n o d i o r i t e , quartz d i o r i t e ,  to the n o r t h and  Fe-rich  a change i n the c h a r a c t e r of  I n t r u s i v e Rocks of the Coast  bodies  t o the F u r r y  massive b o d i e s  r o c k s of the map  area  Coast Range p l u t o n i c  b o d i e s r a n g i n g from  diorite  r a n g i n g from q u a r t z d i o r i t e  (Payne e t a_l. , 1 980).  The  to  Mountain Lake p l u t o n ,  r e l a t e d t o the Squamish i n t r u s i o n s , c o v e r s the n o r t h e a s t c o r n e r of  Page  F i g u r e 3.2, ridge tops. south  outcropping  Furry pluton, a f o l i a t e d  of the map  biotite  above t r e e l i n e as massive  are up  area.  Contact  body o c c u p i e s  to s e v e r a l hundred meters wide; t h e y  pendant  (McCullough,  h o r n b l e n d e and parallels  Downing R i d g e ,  are  s e d i m e n t a r y r o c k s of  the  1968).  Mountain Lake p l u t o n weathers g r e y - g r e e n massive, coarse  pale-coloured  metamorphic a u r e o l e s , c o n t a i n i n g  superimposed on the v o l c a n i c and Britannia  80  t o medium-grained, and p l a g i o c l a s e phenocrysts.  the o u t l i n e of the pendant.  a margin, up  to 50 m t h i c k , a l o n g  granodiorite  i s c u t by numerous c o a r s e  to pale grey,  contains A minor  is  biotite, foliation  Finer grained d i o r i t e  forms  the c o n t a c t w i t h package 1. grained g r a n i t i c  dykes.  The  Page 81  4. WHOLE ROCK GEOCHEMISTRY  4.1 INTRODUCTION  Whole rock a n a l y s e s from F i g u r e 3.2 were used  t h e f r e s h e s t , most massive u n i t s i n  t o c l a s s i f y major rock t y p e s and t h e magmatic  s u i t e on the e a s t s e c t i o n o f B r i t a n n i a Ridge.  Hand specimans and  thin  samples from a  s e c t i o n s were used  to select  the f r e s h e s t  s u i t e of 410 r o c k c h i p samples t a k e n Analyses  from  from  ( F i g . A.1).  38 samples, r e c a l c u l a t e d v o l a t i l e - f r e e , a r e  tabulated  i n Table  all  i n t h e map a r e a a r e r e p r e s e n t e d  units  t h e map a r e a  4.1 and a r e used  i n plots  i n t h i s chapter.  in this  Not  chemical  classification.  Chemical  a n a l y s e s o f t h e e n t i r e s u i t e o f rock c h i p samples  were by Chemex Labs L t d . , North Vancouver.  Locations,  d e s c r i p t i o n s and a n a l y t i c a l v a l u e s o f a l l samples a r e l i s t e d i n Appendix A ( T a b l e s A.4 and A . 5 ) . a n a l y t i c a l methods used  Chemical,  by Chemex Labs L t d . a r e i n Appendix C.  p e t r o g e n e t i c and t e c t o n i c c l a s s i f i c a t i o n o f rock  types and the v o l c a n i c s u i t e metamorphism and h y d r o t h e r m a l the B r i t a n n i a o r e b o d i e s . rock types  D e t a i l s o f p r e p a r a t i o n and  i s limited alteration  by r e g i o n a l and c o n t a c t related  The p r i m a r y m i n e r a l o g y  i n most cases has been d e s t r o y e d .  to d e p o s i t i o n of of the o r i g i n a l  A l l the v o l c a n i c  r o c k s of the e a s t s e c t i o n o f B r i t a n n i a Ridge l i e w i t h i n 3 km o f  Page  TABLE  4.1.  Maior elements i n s e l e c t e d rock c h i p samples from t h e S r i t a n n i a Ridae a r e a ( F i q . 3.2), s o u t h w e s t e r n B r i t i s h Columbia. S a m p l e s a r e l o c a t e d o n F i g u r e 3.2 a n d m A p p e n d i x A i F i a u r e A . I , a n d T a b l e s A.4 a n d A.51. D a t a a r e p l o t t e d i n F i g u r e s 4.1 t o 4 . 1 0 . V a l u e s a r e r e c a l c u l a t e d v o l a t i l e - f r e e from Appendix A ( T a b l e s A.4 a n d A . 5 1 w i t h F e O • 0.8999 FejO-j. T  PACKAGE  UN I T  ROCK  TYPE  SAMPLE  NUMBER  FIELD  "FOOTWALL"  SEQUENCE Andes i t e basalt Basalt  "MINE"  626 009  MC8 3 MC82 MC82 MC83 HC83 MC82 MC82 MC8 3 MC8 3 MC83 • MC83  630 • 015 • 015 632 • 631 -019 019 633 -615 631 60S  ELEMENT Si0  Iweight A t  2  2°3  56 53  1 2 69  1 5 98 1 7 53  54 85 1 6 04 94 04 1 8 40 81 0! 95  1 1 1 1  6382 6169  50 50 50 52 49 53 52 51 48 52 52  6380 6230  UA a  6381 62 36 a 2236 6183 6384 62 34 a 2234 n 6 3 88 6387  •  8 7 7 7  1 9 18 1 7 1 7 1 9 1 7 1 7  F  e  0  T  7 55 9 06  24 9 98 10 69 1 0 63 9 1 4 1 0 25 9 85 9 59 8 -i 53 19 8 7 26  T  i  * 0  2  7 1 49 71 54 70 60  1 457 1 4 50 1 5 36  2 2 1  36 1) 45  Dacite (Pit dome!  MC82 2 3 8 MC82 238 MC81 6 4 5 MC8 3 6 4 5 MC8 3 -614 MC82 -211 M C 8 2 -211 MC83 6 1 9  6257 2257 * 6199 6259 • 6 385 UA 6250 2 2 50 * 6191 *  66 65 65 64 60 63 6) 62  85 65 55 4B 56 91 04 17  1 7 1 6 16 1 7 1 6 1 8 18 1 8  11 96 61 26 19 24 26 17  5 5 6 5 7 6 6 6  10 28 1 2 99 58 29 21 87  MC8 3 MC8 3 MC8! NC81 MC81 HC8 3 MC81 MC83  620 601 601 618 601 617 619 201  6 1 7 9 UA 6365 6166 • 6177 6 368 6176 6178 6154  70 66 16 66 71 70 67  06 48 51 14 78 55 91 . 68 20  1 4 1 4 1 5 1 6 1 1 1 4 1 5 1 5  59 51 1 7 52 90 79 52 61  1 4 4 4 ) 1 4 4  77 40 70 11 60 08 02 25  MC81 MC8 3  641 641  6191 6394  *  MC8 3 MC8 3  647 647  6400 6401  *  *°  .98 1 .02 1 .01 .97  9 8 9 7  . 48 . 4 7 . 68  6088 2008 6144  !i<  7 7  1.13 1.11 1 .08 . 98 1 .01 .98 .93  MC82 0 4 0 MC9 2 -040 MC82 0 0 7  dry)  .84 .94  41 09 22 45 00 46 47 99 96 43 99  Rhyolite (Cyrtina dome)  C  1 7 40  58 86 91 95 8 15 6 68 ' 7 41 7 24 9 58 7 7] 7 69  a  0  N  1 0 01 9 42 6 6 6 6 5 6 6 9 6 7 6  41 1 7 16 06 54 46 31 01 40 82 89  a  Z °  K  2°  1 2 07  2 00 1 68 ' 3 27 1 91 1 67 2 12 4 69 4 41 4 59 4 28 3 20 5 52 4 56  p  2°5  .19 .20  1 16 2 92 2 99 1 72 75 17 17 27 1 23 10 1 46  .20 . '9 .13 .15 .25 .23 .24 .19 .26 . 19 .26  2 2 1  60 66 49  .07  . 1 7 . 1 8 . 20 . 1 9 .29 . 1 4 . 1 7 . 1 9  2 2 2  54 46 56  2 47 2 43 1 25 '  2 2 1 1 1 1 1 4  21 44 91 1 5 48 1 6 19 1 6  1 1 2 1 6 2 2 2  1 7 09 1 7 71 60 56 51 1 8  4 5 3 4  1  05 04 56 41 35 84 85 51  .63 . 58 . 58 .67 .51 . 59 .61 . 66  1 58 2 2 66 1 65 2 51 1 67 2 0B 1 87  1 4 1 2 1 1 2 2  1 4 1 1 0 3 77 62 54 13 58  3 68 4 25 4 45 5 05 2 62 4 »8 4 28 4 51  2 2 2 2 1 2 1 2  19 81 70 29 12 65 06 1 6  . . . . .  78 84  1 1  5 5  11 12  .22 .23  1 40 1 25 5 77  .08 . 1 3  SEQUENCE  (Victoria dome I  Crystal lithic tuff "HANGINGWALL" 1 3  1 4  DYKES  MC8 3 MC82  '  LAB  AND  .70 .69 .71 .74 1 .09 .75 .71 .80  18 14  1 6 17 1 6 0]  7 47 7 60  . 88 . 86  5 5  16 4 1  66 8 3 • 66 5 )  15.74 '5.85  4 4  54 48  . 68 . 72  2 2  49 45  14.36 14.14 1 5 . 72 1 5 . 49 15.31 14.13 1 4 . 36 i t 7.06  2 2 4 4 4  58 44 49 47 33 ! 34 3 31 5 35  . 32 . 30 . 65 .67 . 67 .51 .50 . 76  2 2  43 30  .32 . 33  . 70 . 50  . 78 . 96 i .02 1 . 30 1.14 i. i a  1.84 1.94 * .05 ! . 56 3.91 2 . 73  62 62  19 65 1 4 1 0 66 4 1 2 4 80 3 88  21 16  1 3  16 1 7 1 6 '. 7 1 1  . 1 6 . 1 7 . 1 1  SEQUENCE Crystal lithic  tuff  Rhyodacite  MC83 6 0 9 MC8 3 6 0 9 MC8 3 6 1 0 MC8 3 61 3 MC8 3 61 3 MC8 2 1 85 MC8 2 185 MC8 2 -186  6370 637 1 6372 6 3 74 6375 61 38 21 36 61 39  UA  MCS3-638 MC83-654  6390 6404  UA UA  MC82-315 MC82-317 MC82-192 MC82-17 3 MC82->00 MC82-189  6 3 3 5 UA 6 3 36 UA 6 1 4 5 UA 6 1 2 2 UA 6020 6142  •  UA  •  UA §  72 27 72 37 6 6 67 67 57 67 92 73 43 73 0 4 65 54  98 90 28 94 85 9 3 d9 2 1 1  2 l l  3.05 2 . 97  4 74 30 5  1 74 50  . 18 . 20  2.05 2 . 25 3.71 2 . 35 2 . 50 1 .32 1 . 79 3. 29  4 5 3 4 4 5 5 J  87 08 91 47 69 45 69 68  2 48 2 45 2 39 2 85 2 34 31 31 2 07  .09 .08 . 1 9 . 1 3 . 1 8 .07 . 10 . 1 J  '•  INTRUSIONS 18  1 9  Dacite  O lorite • Andesite  73 74  68 34  1 4 06 1 3 28  67 6 ) 54 57 66 t>0  37 30 J 1 08 04 44  1 55 9 1 6 41 15 0 9 t 7 62 1 4'-S 1 7o7  4 3 6 10 i 5 28 9 31 7 1 5 9 40 T  2 2  7 1 87  ) 49 5 78 7 75 4 1 2 1 5 J 00  4.12 4 . 06  2  ! 89 22  . 10 . i 1  4 . 30 4.14 1.77 3 . 78 3 . -M 4 . ! 5  1 l 8 1 06 0 1 10 50 1 i 3.  . 2 l . 31 .28 . 34 . JO .24  i 2 1 4 7 7 01 1 57 1 4 6 2 7 7 UA 1 295 . 1 9 .02 . MC82-258 .21 4 . 76 Rhyo1i t e 79 hQ 1 2 36 1 29 . 1 7 85 2 . 54 2 55 .02 6 3 3 9 UA . 5 3 MCB2-154 3 ai a a * a a a a a a a a a a a a a a a a a a a = s S3* a a m * = a a a a 3 3 a sa a a a a a a a a a a a a =a a a a • • • • • • • • m ii i i s i m s i i i same '1, -ind reoeat s a m p l e f rom t h e same s a m p l e i s i n d i c a t e d by , o f t r i e a aide p u l p b y D u p l i c a t e a n a l y s i s o f the o u t c r o p b y •>, " U n a l t e r e d " s a m p l e s , i n d i c a t e d b y "UA", a r e d e f i n e d , b a s e d o n a p p a r e n t i m m o O i l i t y o f MqO a n d C a O , i n _  Page 83  known massive s u l p h i d e d e p o s i t s ; a d i s t a n c e commonly w i t h i n the zone of i n f l u e n c e o f a l t e r a t i o n  related  to hydrothermal  systems  d e p o s i t i n g massive s u l p h i d e s  (Ohmoto and S k i n n e r , 1983).  of S i 0 ,  and FeO  K 0,  2  2  N a 0 , MgO, 2  CaO  i n v a l i d a t e s most c l a s s i f i c a t i o n  (Payne e t a l . ,  1980)  schemes f o r igneous r o c k s .  the l i m i t a t i o n s posed by the a l t e r e d d a t a have been used t o i d e n t i f y  Mobility  Within  s u i t e , whole r o c k g e o c h e m i c a l  relatively  "unaltered"  samples.  These have been used t o a s s e s s t h e g e n e r a l c h e m i c a l c h a r a c t e r i s i t c s o f t h e r o c k u n i t s , t o c h a r a c t e r i z e the magmatic suite  f o r comparison w i t h s i m i l a r v o l c a n i c  a t e c t o n i c environment  s u i t e s , and t o propose  f o r the f o r m a t i o n of the B r i t a n n i a  volcanic  suite.  " U n a l t e r e d " , o r the l e a s t a l t e r e d freshest  samples were i d e n t i f i e d  Rosen-Spence sequence.  samples,  from the 38  by a p r o c e d u r e d e v e l o p e d by  (1976) i n a study o f the Archean Noranda  Unaltered versus a l t e r a t e d  c h e m i c a l v a r i a t i o n diagram of % MgO  samples  The  (de Rosen-Spence,  B r i t a n n i a Ridge s u i t e  an o r i g i n a l  v e r s u s % CaO  where the  an Fe-poor Cascade particularly,  is relatively  t r e n d of i r o n e n r i c h m e n t .  package  1 r o c k s and  of an i s l a n d a r c t h o l e i i t i c  from  unaltered  1976).  i s a calc-alkaline  medium K c o n t e n t and  volcanic  a r e d e f i n e d on a  u n a l t e r e d domain f o r s u b a l k a l i n e r o c k s i s d e f i n e d Cenozoic s u i t e s  de  s u i t e which  sodic. The  l a t e r dykes have  series.  has  It follows  s u i t e and, more characteristics  A l t e r a t i o n , believed to  Page  reflect  hydrothermal  the mine sequence. depleted  i n CaO  mineralization, The  suite  i s most i n t e n s e i n package  i s g e n e r a l l y e n r i c h e d i n MgO  compared t o normal s u b a l k a l i n e r o c k s .  c a l c - a l k a l i n e v o l c a n i c r o c k s formed i n an i s l a n d a r c setting. bimodal  -4.2  2,  and  The tectonic  An e x t e n s i o n a l t e c t o n i c environment i s i n d i c a t e d by  the  suite.  GROSS CHEMICAL CHARACTERISTICS  4.2.1  Rock Types  Thirty-eight selected on  84  of the most massive,  to c h e m i c a l l y c l a s s i f y  least altered  rock t y p e s and  the e a s t s e c t i o n of B r i t a n n i a Ridge.  c o v e r more than a t h i r d The  c l a s s i f i c a t i o n was  the v o l c a n i c s u i t e  P y r o c l a s t i c units that  of the a r e a of F i g u r e 3.2 based  samples were  were not  on 54 whole r o c k a n a l y s e s  (16 of  which are r e p e a t samples of o u t c r o p s or r e p e a t a n a l y s e s of c o v e r i n g the c o m p o s i t i o n 4.1 ).  The  from  9 and units  sequence.  basalt  to r h y o l i t e  sample s e t i n c l u d e s : 16 a n a l y s e s from  i n package 1--the p r e - o r e units  range from  10  units  13 and  14  i n package 3--the p o s t - o r e ,  A l s o i n c l u d e d a r e 10 a n a l y s e s from  10  pulps)  (Table 2,  f o o t w a l l sequence, 18 a n a l y s e s  i n package 2--the mine sequence, and  used.  3 and from  analyses  hangingwall  relatively  fresh  dykes, which are p o s s i b l y c o g e n e t i c w i t h the a l t e r e d v o l c a n i c s u i t e they  i n t r u d e and c r o s s c u t .  7  Page 85  D e f i n i t i o n o f r o c k types here i s based on % S i 0 ,  despite the  2  suspected m o b i l i t y sulphides.  Analyses, recalculated  i n T a b l e 4.1, a r e p l o t t e d  FeG\p/MgO v e r s u s % S i 0 . 2  (1981).  1974) r a n g i n g  by t h o l e i i t i c  Samples from C y r t i n a Samples from u n i t  on F i g u r e  dome  define  have samples  4.1, a p l o t o f %  a calc-alkaline  and r h y o l i t i c  dykes.  and samples from u n i t ( u n i t 3) p l o t  r h y o l i t e domains, g e n e r a l l y  the  P i t dome and t h e more f e l s i c  to rhyolite,  Samples from  ( t r i a n g l e s ) p l o t as d a c i t e  f o r m i n g two c l u s t e r s  field.  volcanic  dacite  representing  Units  to r h y o l i t e i n composition.  cut the a l t e r e d  unit  7 p l o t as b a s a l t .  i n the r h y o l i t e  V i c t o r i a dome.  Gill  suite  9 (squares) s c a t t e r across the a n d e s i t e ,  and  ("D's") t h a t  v o l a t i l e - f r e e from  i n c o m p o s i t i o n from b a s a l t  andesitic  2 p l o t as a n d e s i t e - b a s a l t ,  rhyolitic  o f massive  B o u n d a r i e s f o r r o c k t y p e s a r e from  The a n a l y s e s g e n e r a l l y  (Miyashiro, cut  to deposition  F o r s i m p l i c i t y , f i e l d names f o r t h e r o c k u n i t s  been r e t a i n e d . listed  of s i l i c a r e l a t e d  13 and 14 Dykes  r o c k s a r e a n d e s i t i c and  i n c o m p o s i t i o n , but c o a r s e r - g r a i n e d  intrusive  bodies  p l o t as d a c i t e .  4.2.2 Packages  A general F i g u r e 4.1. rhyolite, by  l i t h o l o g i c g r o u p i n g by packages i s d e m o n s t r a t e d on Package 1 ( c i r c l e s ) i s c h a r a c t e r i z e d  package 2 ( s q u a r e s ) by d a c i t e ,  rhyodacite.  by b a s a l t and  and package 3  (triangles)  The r e l a t i o n s h i p between the b a s a l t i c and f e l s i c  •  o  Package I ("unaltered",  altered)  •  •  Package 2 ("unaltered",  altered)  Package 3 ("unaltered",  altered)  * •  a 0  Dykes Sky  Pilot Tholeiitic  Calcalkaline ,192 . 185 M 638  o  en 2 3 o *  186 - " ^ ~23B  8  613 -,i>620  2\ a 632  633  635  Q  0  HV°  </A|5° 608 ••°630 • o  »  6  2  a ,603  641  S  9  Pit  6  V,c t o r i a dome  \  645  ^019  6 3 0  639 647>5n60l  dome  040 C y r t i n o dome  IC./007 Basalt  Andesite  Rhyolite  Dacite  53  63 %  70  IS"  SiO„  13 FIGURE 4. 1  P l o t o f % F e O „ / M g O v e r s u s % S i 0 d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , • southwestern B r i t i s h Columbia. FeOm/MgO = 1.56 x S i O , d e f i n e s b o u n d a r y f o r t h o l e i i t i c v e r s u s c a l c - a l k a 1 i n e domains ( M i y a s h i r o , 1 9 7 4 ) . B o u n d a r i e s f o r rock t y p e s a r e based on % S i O , (Gill, 1981). D u p l i c a t e a n a l y s e s a r e j o i n e d by l i n e s . A l t e r e d versus " u n a l t e r e d " are d e f i n e d i n Figure 4.2. 2  (D CO  Page 87  l a v a s i s u n c l e a r , but a m a f i c t o f e l s i c with the d i f f e r e n t i a t i o n element v a l u e s c a l c u l a t e d for  c y c l e would be c o n s i s t e n t  of a v o l c a n i c p i l e .  Average major  from whole r o c k a n a l y s e s  i n T a b l e 4.1  the main r o c k t y p e s o f t h e t h r e e packages a r e i n T a b l e 4.2.  Representation  from  each o f t h e t h r e e packages  varies  significantly.  The p r o p o r t i o n o f magmatic r o c k s t o p y r o c l a s t i c  and  r o c k s drops  sedimentary  from  65 % i n package 1 , t o 30 % i n  package 2 t o o n l y 5 % i n package 3.  1. Package 1 A l t e r e d b a s a l t and r h y o l i t e bimodal  arc t h o l e i i t i c  series.  f l o w s o f package 1 r e p r e s e n t a Mafic flows cover  10 % o f t h e map  a r e a and make up 80 % o f t h e magmatic r o c k s o f package 1. Analyses, from  unit  7 p l o t as b a s a l t and s t r a d d l e M i y a s h i r o ' s  (1974) boundary between t h o l e i i t i c analyses plot Mountain  and c a l c - a l k a l i n e .  in. a c l o s e c l u s t e r w i t h m a f i c  samples from  unit  2 a r e h i g h e r than  those  from  unit  s t a n d a r d d e v i a t i o n i n % SiC>2 ( T a b l e 4.2) r e f l e c t s composition. this  Sampling  silica  mobility.  7.  The l a r g e  t h i s range i n  i s n o t adequate t o determine  composition  or i f i t r e f l e c t s  Compared t o average  Cascade h i g h -  1971) b a s a l t s o f package 1  have lower AI2O3 and CaO v a l u e s , and a r e e n r i c h e d  On F i g u r e 4.1, package 1 r o c k s show no i n c r e a s e i n  FeO /MgO w i t h T  study  b a s a l t s ( I r v i n e and B a r a g e r ,  are a l k a l i - r i c h , i n MgO.  i n this  i s a r e f l e c t i o n of primary  more l o c a l alumina  Sky P i l o t  (Heah, 1-982) i n d i c a t e d by d o t s on F i g u r e 4.1. S i G ^  a n a l y s e s from  if  These  increasing  S i 0 2 , which i s a c h a r a c t e r i s t i c o f an  TABLE 4.2.  PACKAGE ROCK TYPE UNIT n ELEMENT T  2 A1 0 Fe 0 Ti0 MgO CaO Na 0 s i 0  2  3  2  3  2  2  2° 2°5 Loss on Ignition K  P  1. 2.  Average major element v a l u e s , from T a b l e 4.1, f o r b a s a l t s , d a c i t e s and r h y o d a c i t e s from t h e e a s t s e c t i o n of B r i t a n n i a Ridge ( F i g . 3.2), s o u t h w e s t e r n B r i t i s h Columbia. 1 BASALT 2, 7 13 . mean S.D 2 50.60 16.51 9. 74 0.91 6.81 6.48 3.35 1 .05 0.20 3 .72  . 5.58 1 .08 2. 52 0.09 2.07 1 .66 1 .28 1 .08 0.05 1 . 49  2 DACITE 9 16 mean S.D. 68.61 1 3.69 4.74 0.56 2.43 2.10 2.86 2.59 0.15 2.29  9.79 4.08 2.11 0.25 1 . 42 1 .51 1 .64 1 .26 0.07 0.72  3 RHYOLITE 13, 14 10 mean S.D. 67.47 14.97 4.26 0 . 56 1 .81 2.65 4.65 2.24 0.16 1 . 72  "n" i s the number of a n a l y s e s from each rock type i n c l u d e d the average. D u p l i c a t e a n a l y s e s were averaged b e f o r e calculations. "S.D." i s the s t a n d a r d d e v i a t i o n .  3.02 0. 59 1 .03 0.17 0. 64 0. 55 0.44 0. 48 0.05 0. 34 in  Page 89  island  arc t h o l e i i t i c  volcanism, p i l l o w package  (Miyashiro,  1974).  Submarine  l a v a s , c h e r t s , t u r b i d i t e s and s p i l i t e s i n  1 a r e a l s o c h a r c t e r i s t i c o f an a r c t h o l e i i t i c  (Jakes and G i l l , high.  rock s e r i e s  1970).  series  v a l u e s range from v e r y low t o v e r y  The mean v a l u e o f 3.72 % f o r "Loss on I g n i t i o n "  b a s a l t s of package  Rhyolite  1 indicates strong  f l o w s o f package  from  alteration.  1 c o v e r about 3 % o f t h e map a r e a  and make up t h e o t h e r 20 % o f t h e magmatic r o c k s i n package A n a l y s e s from C y r t i n a dome ( u n i t on F i g u r e and  3.  3) p l o t as c a l c - a l k a l i n e  4.1, c h e m i c a l l y d i s t i n c t  Package  from f e l s i c  1 r h y o l i t e s a r e MgO-rich  units  1.  rhyolite  i n packages 2  and N a 2 0 - r i c h compared t o  the P i t and V i c t o r i a domes .(package 2 ) , and a s h f l o w s o f u n i t s 9 (package 2 ) , 13 and 14 (package 3 ) .  2. Package 2 The d a c i t e dome complex  (unit  9) c o v e r s 10 % o f t h e map a r e a  and makes up about 30 % o f t h e r o c k s i n package unit  A n a l y s e s from  9, p l o t t e d as squares on F i g u r e 4.1, range from a n d e s i t e t o  rhyolite  i n cpmpositon w i t h i n t h e c a l c - a l k a l i n e domain d e f i n e d by  Miyashiro reflecting  (1974).  Samples p l o t g e n e r a l l y  the s p a t i a l l y  dacites  i n two c l u s t e r s  and c h e m i c a l l y d i s t i n c t  V i c t o r i a dome members o f u n i t  9.  ( I r v i n e and B a r a g e r , 1971), u n i t 2  % (Table 4.2) r e f l e c t s  P i t dome and  Compared t o average  significant  Cascade  9 i s a l k a l i - p o o r , has low  AI2O3 and N a 0 v a l u e s , and h i g h MgO v a l u e s . 2.29  2.  An average L.O.I of  alteration  i n these  Page  90  samples.  3. Package 3 Units represent  13 and 20  14 t o g e t h e r c o v e r 5 % of the map  % of the r o c k s of package 3.  t r i a n g l e s on F i g u r e 4.1, composition. 4.2),  On  3  L.O.I  ( T a b l e 4.2)  the map  4.3  area  1971)  r o c k s from  v a l u e s l e s s than  indicate  unaltered—package  rhyolite  Compared t o average  Barager,  MgO-rich.  Samples, p l o t t e d  the b a s i s of mean major element v a l u e s  t o as r h y o d a c i t e .  and  and as  are c a l c - a l k a l i n e d a c i t e to r h y o l i t e i n  between those of d a c i t e and  ( I r v i n e and  area  the u n i t s a r e  v a l u e s from  the  package 3 are 2 % from  t h a t the r o c k s are  (Table referred  Cascades  alkali-poor  analyses  i n package  relatively  3 i s the l e a s t a l t e r e d of the t h r e e packages i n  ( F i g . 3.2).  ALTERATION  All  of the v o l c a n i c r o c k s i n the B r i t a n n i a Ridge a r e a  are  altered.  M i n e r a l assemblages i n c l u d e c l a y m i n e r a l s , q u a r t z ,  sericite,  chlorite,  calcite  g r e e n s c h i s t metamorphism and  and  epidote.  hydrothermal  These r e f l e c t r e g i o n a l alteration  the d e p o s i t i o n of v o l c a n o g e n i c massive s u l p h i d e s . processes  of a l t e r a t i o n a r e superimposed and  indistinguishable. original  Primary  mineralogy  related  The  two  often  of the r o c k s and  major element c h e m i s t r y have been d e s t r o y e d .  the  to  Page 91  C h l o r i t i z a t i o n and s e r i c i t i z a t i o n from most u n i t s .  Average L.O.I v a l u e s  i n the t h r e e packages a r e h i g h :  f o r package 2, and 1.79  4.3.1  "Unaltered"  Within  versus  samples were i d e n t i f i e d  Fourteen  Altered  3.72  % f o r package 1, 2.29  %  4.2).  Samples  suite'; " u n a l t e r e d " o r l e a s t a l t e r e d  on F i g u r e  identified  discriminating  specimans  f o r the most massive  % f o r package 3 ( T a b l e  the m e t a v o l c a n i c  CaO--criteria  i n hand  In t h i n s e c t i o n , f e l d s p a r s i n a l l u n i t s a r e  commonly s a u s s e r i t i z e d . units  is visible  4.2  with  respect  by de Rosen-Spence  for identifying alteration  t o % MgO  and %  (1976) as the most  in volcanic  rocks.  samples p l o t w i t h i n the " u n a l t e r e d domain" d e f i n e d f o r  normal s u b a l k a l i n e r o c k s are  i n d i c a t e d by s o l i d  the  suffix  "UA"  by de Rosen-Spence  symbols on F i g u r e s  on T a b l e  4.1.  (1976).  4.1  The u n a l t e r e d  These  t h r o u g h 4.10, subset  samples and by  i n c l u d e s : one  sample from package 1, two samples from package 2, t h r e e  samples  from package 3, and e i g h t samples from dykes and i n t r u s i o n s t h a t c u t the a l t e r e d v o l c a n i c s .  Samples  " u n a l t e r e d domain" on F i g u r e the o r i g i n a l  chemistry  4.2  t h a t p l o t w i t h i n the  are considered  to best  o f the s u i t e ( i n the absence o f  f o r elements s p e c i f i c a l l y  represent analyses  noted f o r i m m o b i l i t y ) .  Most samples from the B r i t a n n i a Ridge s u i t e p l o t o u t s i d e the " u n a l t e r e d domain" on F i g u r e  4.2.  enriched  i n CaO  in. MgO  and d e p l e t e d  Thus the s u i t e i s r e l a t i v e l y compared  t o normal  unaltered  FIGURE 4.2  P l o t of % MgO v e r s u s % CaO d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , s o u t h w e s t e r n B r i t i s h Columbia. Data a r e i n d i c a t e d from package 1 by c i r c l e s , from p a c k a g e 2 by s q u a r e s , f r o m p a c k a g e 3 by t r i a n g l e s , and from c r o s s c u t t i n g d y k e s by "D's". Samples t h a t p l o t w i t h i n the " u n a l t e r e d d o m a i n " f o r normal s u b a l k a l i n e r o c k s (de R o s e n - S p e n c e , 1976) a r e i n d i c a t e d by s o l i d symbols. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g .  j~ ^  (D  Page  subalkaline  rocks.  .Most a n a l y s e s from the  sequences, packages 1 and squares r e s p e c t i v e l y ) ,  2 (plotted  are  altered,  "pre-ore" s t r a t i g r a p h i c  orebodies.  A n a l y s e s from package 3,  (triangles)  and  within  s u i t e , and  the  fresh  tool  2  the  the  q u i c k method of  and  S i 0 ) on 2  the  altered  sequence  these  criteria  the  alteration  plot  clearly  rocks providing  (Na20,  following  plots  altered  (Figs.  to  4.8)  three' packages  characterization  of  the  later crosscutting  volcanic  suite  samples on  shows them t o be  Figure  generally  4.3,  within  subalkaline  are  the dykes  i s unknown.  total alkalies  of  rocks.  Alteration  p l o t of  a for  four  compared t o normal s u b a l k a l i n e  t o the  relationship  4.3  from the  for  separates  chemical c r i t e r i a  whose d e t a i l e d  silica,  Britannia  Using f u r t h e r  i s based on  The  to the  unaltered,  volcanic  magmatic s u i t e a t B r i t a n n i a  Alkali  their  allow  E x c l u d i n g t h e s e samples means t h a t  4.3.2  and  where o u t c r o p exposure does not  s i x " u n a l t e r e d " samples s e l e c t e d  demonstrated t o be  circles  are  assessing  This i n i t i a l  l a t e r dykes from the  interpretations.  mine  i d e n t i f i e s a more r e l i a b l e s u b s e t  suite.  f o r grouping u n i t s  clear K 0,  of  as  hangingwall  " u n a l t e r e d " samples by  and  classification  the  and  age.  provides a useful a volcanic  4.2  relationship  ("D's") g e n e r a l l y  supporting t h e i r "post-ore"  I d e n t i f i c a t i o n of  Figure  which s u p p o r t s  interpreted  l a t e r dykes  on  footwall  93  versus domains  % Alk  —i  \  45  FIGURE 4.3  i  i  50  55  .  i  J  i  60  65  70  1—  75%Si0  2  P l o t o f % N a 0 • * KjO v e r s u s % S i O , d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , s o u t h w e s t e r n B r i t i s h C o l u m b i a . A l k a l i n e v e r s u s s u b a l k a l i n e b o u n d a r y i s f r o m I r v i n e and B a r a y e r (1971). O t h e r b o u n d a r i e s a r e from de R o s e n - S p e n c e (1976) a f t e r Kuno ( 1 9 6 6 ) . An o r i g i n a l c a l c i c magmatic t r e n d i s o u t l i n e d by t h e " u n a l t e r e d " s u b s e t ( s o l i d s y m b o l s ) d e f i n e d i n F i g u r e 4.2. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g . R e f e r t o F i g u r e 4.1 f o r s y m b o l s . 2  Page 9 5  ( I r v i n e and B a r a g e r , 1971; de Rosen-Spence, 1976) w i t h t h e e x c e p t i o n o f package 1 b a s a l t s , which a r e a l k a l i n e . subset  (solid  symbols) d e f i n e s  Altered  1986) w i t h i n  samples a r e g e n e r a l l y  A large  Figure  P i t dome member o f u n i t  2  4.4, a  of u n i t  7 and samples  from  2  of K during  alteration.  Very low K v a l u e s i n  they a r e n o t t r u l y a l k a l i n e  rocks,  t h e a l k a l i n e domain as a r e s u l t o f e n r i c h m e n t o f  High K 0 v a l u e s r e f l e c t 2  ubiquitous within  the strong  r o c k s o f package 2.  %) i s from a c r y s t a l l i t h i c altered  metasomatism.  9 d i s p l a y a wide range o f K 0 v a l u e s  samples i n d i c a t e t h a t  plot within  Na 0.  Basalts  2  suggesting m o b i l i t y  but  by a l k a l i  that  2  2  basalt  suggests  this,  range i n K 0 v a l u e s i s d e m o n s t r a t e d on F i g u r e  p l o t of % K 0 versus % S i 0 . the  values,  3.2 have been a f f e c t e d  trend  the s u b a l k a l i n e  more a l k a l i n e than  which, a l o n g w i t h wide ranges i n a l k a l i rocks within  unaltered  an o r i g i n a l c a l c i c magmatic  (de Rosen-Spence and S i n c l a i r , domain.  The  sericitization,  The h i g h e s t  t u f f of unit  to q u a r t z - s e r i c i t e s c h i s t that  K 0 v a l u e (5.29 2  10--a u n i t  h o s t s many  variably  Britannia  orebodies.  Samples from u n i t s  7 and 3 o f package 1 and from u n i t  1 4 of  package 3 p l o t i n t h e "Na added" domain compared t o normal subalkaline  r o c k s on F i g u r e  4.5, % N a 0 v e r s u s % S i 0 . 2  enrichment i n the b a s a l t  i s due t o s p i l i t i z a t i o n  w i t h sea water.  plagioclase  vesicles  filled  Altered  with c a l c i t e ,  2  Na  through  reaction  p h e n o c r y s t s and abundant  c h l o r i t e and q u a r t z s u p p o r t  this  K 0 2  Very  High  K  5 . High K  V i c t o r i a dome  Medium  K  ig'" ' 0  CD FIGURE  4.4  P l o t of % K 0 v e r s u s % S i O , d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , southwestern B r i t i s h Columbia. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g . KjO d i v i s i o n s a r e from G i l l (1981) m o d i f i e d t o i n c l u d e b a s a l t s , r h y o l i t e s and a l k a l i n e p o t a s s i c s u i t e s ( S p e n c e , 1985). O r i g i n a l medium K 0 c o n t e n t i s o u t l i n e d by " u n a l t e r e d " s a m p l e s ( s o l i d s y m b o l s ) d e f i n e d i n F i g u r e 4.2. R e f e r t o F i g u r e 4.1 f o r s y m b o l s . 2  2  ID  % No 0 2  10  FIGURE 4.5  P l o t of « N a 0 v e r s u s % S i 0 d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , southwestern B r i t i s h Columbia. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g . Normal s u b a l k a l i n e domain i s from de R o s e n - S p e n c e ( 1 9 7 6 ) . R e f e r t o F i g u r e 4.1 f o r s y m b o l s . 2  2  jjj* (D  Page 98  interpretation. the  A s i m i l a r s e a water r e a c t i o n  h i g h Na v a l u e from t h e C y r t i n a  rhyolite  flows  (unit  14).  dome ( u n i t  may be i n d i c a t e d 3) and from the  Two samples i n the "Na added" domain  p l o t as low K on F i g u r e 4.4., and two samples i n t h e "Na domain p l o t as h i g h t o v e r y h i g h K ( F i g . 4.4). relationships  Involving  normal s u b a l k a l i n e  domain on F i g u r e  Exceptions are unit  9, and c r y s t a l l i t h i c i n CaO.  (Fig.  These  CaO, MgO and Si02  Most samples from t h e B r i t a n n i a  low  lost"  suggest Na-K exchange d u r i n g s e r i c i t z a t i o n .  4.3.3 A l t e r a t i o n  Si02-  tuff  The l a t t e r  3.2: s e c t i o n  Ridge s u i t e p l o t w i t h i n t h e 4.6, a p l o t o f % CaO v e r s u s %  7 basalts, (unit  underlie  t h e P i t dome member o f u n i t  10), both o f which a r e r e l a t i v e l y known massive s u l p h i d e  deposits  A-A').  Almost a l l samples l i s t e d added", domain on F i g u r e  i n T a b l e 4.1 p l o t w i t h i n  t h e "Mg  4.7, a p l o t o f % MgO v e r s u s % Si02-  Enrichment o f MgO and/or S i 0 2 would r e s u l t i n the d i s p l a y e d shift  from a normal s u b a l k a l i n e  Enrichment  i n Si02 and o r MgO  would produce d a t a t h a t  plot  domain i n the b a s a l t  domain.  right  data.  i n samples from the f e l s i c i n the "Mg added" domain.  from u n a l t e r e d dykes and l a t e r i n t r u s i o n s subalkaline  by  domes Analyses  ("D's") p l o t w i t h i n the  FIGURE 4.6  P l o t o f % CaO v e r s u s % S i O , d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , southwestern B r i t i s h Columbia. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g . Normal s u b a l k a l i n e domain i s from de R o s e n - S p e n c e ( 1 9 7 6 ) . R e f e r t o F i g u r e 4.1 f o r s y m b o l s .  4.7  P l o t of % MgO v e r s u s % S i O , d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , southwestern B r i t i s h Columbia. D u p l i c a t e a n a l y s e s were a v e r a g e d b e f o r e p l o t t i n g . Normal s u b a l k a l i n e domain i s from de R o s e n - S p e n c e ( 1 9 7 6 ) . R e f e r t o F i g u r e 4.1 f o r s y m b o l s .  Page  4.3.4  Hydrothermal A l t e r a t i o n R e l a t e d  to Massive  101  Sulphides  t  Alteration significant  related  t o the d e p o s i t i o n of massive s u l p h i d e s i s  i n the r o c k s of B r i t a n n i a R i d g e .  are a l t e r e d a c c o r d i n g  t o Izawa's (1980) a l t e r a t i o n  [ A . I . = 100(MgO + K 0)  /(MgO  2  deposits.  depleted  2  2  + CaO  + Na 0 + K 0)] 2  and  unaltered  i n CaO,  and  subset.  With the e x c e p t i o n  haloes  values.  depleted  This a l t e r a t i o n (1980) who  i n MgO  massive s u l p h i d e  Crystal  lithic  displays this  high K 0, 2  2  and  p a t t e r n concurs  with  noted  and  K 0  that rocks  (package 2) were a f f e c t e d by Mg H 0,  and  depleted  low  2  CaO  Kuroko and  Canadian v o l c a n o g e n i c  and  high  i n CaO  and  deposits Na 0. 2  t h a t d e s c r i b e d by Payne e t  metasomatism, e n r i c h e d and  the proposed s t r a t i g r a p h i c haloes  host  typical  N a 0 , low  depleted  the  from the B r i t a n n i a Mine a r e a  i n CaO  Alteration  the  deposits  tuff,  total  in  K 0, 2  Fe.  A l t e r a t i o n w i t h i n the t h r e e packages in. F i g u r e 3.2 agrees w i t h  to  within  Samples from the P i t dome u n d e r l y i n g the o r e  are a l s o e n r i c h e d  2  of s p i l i t i z a t i o n  aroung v o l c a n o g e n i c  hydrothermal a l t e r a t i o n with  and  enriched  i s s i m i l a r to hydrothermal  rock of many B r i t a n n i a o r e b o d i e s ,  2  f o r Kuroko-type  2  v a r i a b l y e n r i c h e d or  d e s c r i b e d by Ohmoto e t a l . (1983).  Si0  "A.I"  2  alteration  al.  index  N a 0 r e l a t i v e t o normal s u b a l k a l i n e r o c k s and  package 1 r o c k s , t h i s a l t e r a t i o n  MgO  samples  A l t e r e d r o c k s were d e m o n s t r a t e d , above, t o be  i n S i 0 , MgO, in K 0  A l l of the  f a c i n g of the  a r e common i n f o o t w a l l r o c k s  generally  sequence.  below  massive s u l p h i d e d e p o s i t s , where  Page  mineral  assemblages c o n s i s t o f : z e o l i t e , m o n t m o r i l l o n i t e ,  and c h l o r i t e p r o c e e d i n g 1983). MgO  toward the o r e zone  (Ohmoto and  sericite Skinner,'  Zoned d e p l e t i o n o f Na->0 and C a 0 and i n c r e a s e o f K 0 2  i s a r e c o r d o f i n t e r a c t i o n between  2  s e v e r a l c y c l e s of hydrothermal a c t i v i t y  a l . , 1983 ).  Most  alteration  (Ohmoto e t  samples o f package 3 and the l a t e r dykes and  i n t r u s i o n s a r e u n a l t e r e d , and t h e r e f o r e r e p r e s e n t rocks.  and  seawater and hot v o l c a n i c  rocks during  post-ore  102  Samples  patterns  sulphide deposits. e n r i c h m e n t and may  h a n g i n g w a l l and  from t h e mine sequence d i s p l a y  expected i n f o o t w a l l rocks U n i t s o f package be e n r i c h e d  typical  below massive  1 d i s p l a y MgO  i n CaO and d e p l e t e d  and  Na 0 2  or enriched i n  K 0. 2  4.4.  MAGMATIC CHARACTERISTICS  4.4.1  Introduction  Chemical c l a s s i f i c a t i o n primarily  of the B r i t a n n i a Ridge s u i t e ,  on the 14 u n a l t e r e d  based  samples d e f i n e d above,, and more  specifically  on the , c r o s s c u t t i n g dykes and i n t r u s i o n s , i s not  definitive.  The dykes d e f i n e an a r c t h o l e i i t i c  an Fe-poor t r e n d of i r o n e n r i c h e m e n t . i n d i c a t e d on F i g u r e  4.1  anhydrous  (Gill,  1981).  follows  A bimodal c h a r a c t e r i s  f o r b o t h package  the e n t i r e s u i t e by the " a n d e s i t e  s u i t e that  1 ( b a s a l t , r h y o l i t e ) and  gap", between  However, the m i s s i n g  53 % and 63 % S i 0  andesite  fraction  2  Page 103  might be r e p r e s e n t e d in  by voluminous p y r o c l a s t i c r o c k s  t h i s c l a s s i f i c a t i o n , o r by deeper l e v e l  dome) p o o r l y  not i n c l u d e d  i n t r u s i o n s (e_.g_.  Pit  exposed and t h e r e f o r e not r e p r e s e n t a t i v e l y sampled.  D e t a i l e d r e l a t i o n s h i p s between t h e b a s a l t i c and f e l s i c remain u n c l e a r .  Package 1 may r e p r e s e n t  a chemically  magma s e r i e s and environment, o r r e p r e s e n t  lavas distinct  t h e e a r l y melt from  which the c a l c - a l k a l i n e s u i t e d i f f e r e n t i a t e d .  4.4.2.  Alkalinity  A normal s u b a l k a l i n e magma s e r i e s i s d e f i n e d subset  (solid  symbols) on F i g u r e  versus  silica.  4.3, a p l o t o f t o t a l  A n a l y s e s from u n a l t e r e d  s u b a l k a l i n e domain d e f i n e d  values in  thin  and  greater  alkalis  samples p l o t w i t h i n the  by I r v i n e and Barager  norm c a l c u l a t i o n s i n Appendix A ( T a b l e s samples support  by the u n a l t e r e d  (1971).  A.4 and A.5) o f rock  a subalkaline c l a s s i f i c a t i o n ,  s e c t i o n i n d i c a t e severe a l t e r a t i o n . subset  medium K 0 content 2  (Gill,  observed  A n a l y s e s f o r Na20, CaO  f a l l within  s u b a l k a l i n e domains i n d i c a t e d on F i g u r e s  chip  a l t h o u g h L.O.I  than 2 % f o r most samples and a l t e r a t i o n  MgO from the u n a l t e r e d  C.I.P.W.  the normal  4.5 t o 4.7.  An o r i g i n a l  1981) f o r the s u i t e i s d e f i n e d  on F i g u r e  4.4.  Criteria  to c l a s s i f y  or a r c t h o l e i i t i c subset  rock  defines a c a l c i c  the s u b a l k a l i n e s u i t e as a c a l c - a l k a l i n e  series i s inconclusive.  The u n a l t e r e d  (arc t h o l e i i t i c ) magmatic t r e n d on F i g u r e  Page  4.3.  This c l a s s i f i c a t i o n  i s s u p p o r t e d by a Peacock  (Peacock, 1931: weight % S i 0 for  2  the B r i t a n n i a Ridge s u i t e  where CaO  Compared t o a r c t h o l e i i t i c  British  Columbia  or c a l c i c  calculated  2  (de Rosen-Spence and  1987).  Index of 64  = Na 0 + K 0) 2  104  Sinclair,  suites  identified in  (Mt E u r y d i c e , D o c t o r ' s P o i n t , S o u t h f o r k , Spences  B r i d g e ) de Rosen-Spence and S i n c l a i r  (1987) found r o c k s from the  e a s t e r n s e c t i o n of B r i t a n n i a Ridge t o be c o n s i d e r a b l y more s o d i c , l e s s p o t a s s i c and  less c a l c i c .  The B r i t a n n i a Ridge s u i t e  between domains f o r i s l a n d a r c t h o l e i i t i c s e r i e s on a p l o t of % K 0 2  Gill,  1970).  and G i l l , trend.  T  and  On a p l o t o f % MgO  1970)  2  (not shown; Jakes and  versus % FeO  the d a t a g e n e r a l l y  calc-alkaline  T  (not shown; Jakes  follow a c a l c - a l k a l i n e  Compared t o t y p i c a l a n a l y s e s from the Cascades  B a r a g e r , 1971) FeO  versus % S i 0  s e r i e s and  2  tholeiitic  or c a l c i c  which would  Cascade  (Irvine  the B r i t a n n i a Ridge s u i t e has h i g h e r T i 0 ,  lower Al-jO-^ and CaO,  falls  and  MgO,  s u p p o r t an a r c  classification.  4.4.3. Fe - Enrichment Trend  The e a s t B r i t a n n i a Ridge v o l c a n i c iron  - depletion  classified the  typical  suite  of the Cascades  f o l l o w s a t r e n d of  ( F i g . 4.8).  The  as c a l c - a l k a l i n e on the b a s i s of the Fe-poor t r e n d  abundance of l a r g e p l a g i o c l a s e p h e n o c r y s t s (Jakes and  1970).  A kink representing  tholeiitic dykes.  suite i s  suite,  On F i g u r e  rapid  samples  Gill,  i r o n enrichment, expected i n a  i s p r e s e n t o n l y i n samples 4.8  and  of l a t e r  from the packages  andesite  d e f i n e a t r e n d of  > 192  .%  Al 0 2  3  22 -  20 -  18 173  ,626  16  .634  x  610  315  I* 185  620.  14  • 638  609 .654  ,258 154  12  _j  45  FIGURE 4.9  i  1  50  55  I  60  i—^.  65  I  70  1  75%Si0  2  P l o t of % A l 0 j v e r s u s % S i O j d a t a ( T a b l e 4.1) from t h e e a s t s e c t i o n o f B r i t a n n i a R i d g e , southwestern B r i t i s h Columbia. O n l y " u n a l t e r e d " d a t a , d e f i n e d i n F i g u r e 4.2, a r e p l o t t e d . C i r c l e d p o i n t s were i n d i c a t e d t o be a l t e r e d on F i g u r e s 4.5, 4.6 and 4.7. The C a s c a d e t r e n d f r o m de Rosen-Spence (1976) r e p r e s e n t s a t y p i c a l c a l c - a l k a l i n e F e - p o o r t r e n d o f i r o n e n r i c h m e n t . Refer to F i g u r e 4.1 f o r s y m b o l s . 2  Page  intermediate  i r o n enrichment.  A t y p i c a l c a l c - a l k a l i n e or  on  Figure  4.9.  from the  t h r e e packages and  felsic  dykes p l o t  field  Figure  Fe-poor t r e n d  Si0  on  shown) the unlike  defined  suites  o l i v i n e and  abundance of the  On  by  that  4.1  4.5.  volcanic  are  o l i v i n e and  s u i t e are  The  to  (Gill,  1981).  Britannia  %  (not  T  suite i s  commonly p o r p h y r i t i c ,  p h e n o c r y s t s i n the  and  The Ridge  rocks  pyroxene p h e n o c r y s t s s u p p o r t s a Later  m a f i c dykes  tholeiitic  by  the  ( u n i t 19)  that  same c r i t e r i a  (Figure  ) .  VOLCANIC ENVIRONMENT  Whole r o c k g e o c h e m i s t r y of  t h i s study  specific  tectonic  e n v i r o n m e n t ; however,  volcanic  b e l t s or  "pendants" i n the  s u g g e s t i v e of  an  and  volcanic  extrusive  support and  with respect  T  not  rocks  calc-alkaline  % FeO /MgO v e r s u s % F e O  pyroxene p h e n o c r y s t s  plagioclase  absence of  the  i n the  (1974)  Miyashiro  a p l o t of  calc-alkaline classification. cut  Almost a l l v o l c a n i c  s u i t e show a t y p i c a l c a l c - a l k a l i n e t r e n d .  tholeiitic  contain  and  4.1  FeOrp/MgO.  and  2  i s defined  107  FeO  4.10).  i s l a n d arc  this interpretation. T  classify  basalts  circum-pacific  i s l a n d arc  the  from B r i t a n n i a  basalts  of  a  northwest-trending are  Abundant p y r o c l a s t i c t u f f s  Relatively  Major element c h e m i s t r y of  diagnostic  Coast Range Complex  setting.  rocks within  i s not  Britannia  also  immobile elements Ridge as  these b a s a l t s listed  pendant  by  Ewart  Ti0  i s l a n d arc is similar (1976).  2  (Fig. to  Page  The  B r i t a n n i a Ridge s u i t e may  represnt  s u i t e s i m i l a r to the N o r t h e a s t Japan a r c i n c l u d e s both a t h o l e i i t i c calc-alkaline in this  character,  sufficient  3).  Similarities and  the  t h a t h o s t s the  Ohmoto (1983) i n t e r p r e t e d a bimodal b a s a l t s u i t e to have formed i n an  extensional  associated with t e n s i o n a l t e c t o n i c s . suggested s u b d u c t i o n a s s o c i a t e d  spreading  region  an  and  i t s ore where  - dacite, rhyolite  back-arc spreading  region  co-workers plates  t e c t o n i c s i n the  back-arc  (Ohmoto, 1983).  m e a n i n g f u l statement can  the degree of d i f f e r e n t i a t i o n closely  bimodal  island arc.  with s t e e p l y d i p p i n g  the Green T u f f v o l c a n i s m and  The  data  Kuroko d e p o s i t s  Uyeda and  initiated  No  the  e x i s t between the B r i t a n n i a a r e a Japan B a s i n  a  i n d i c a t i v e of  environment or s p l i t t i n g w i t h i n  that  Sampling and  to determine t h i s . be  volcanic  1974),  rock, s e r i e s (package 1 ) and  e s p e c i a l l y of package 1, may  extensional  deposits,  not  i s l a n d arc  (Miyashiro,  rock s e r i e s (packages 2 and  study are  an  109  be made from t h e s e d a t a a l o n e about  i n the  suite.  l i n k e d problems of p e t r o g e n e s i s ,  t e c t o n i c environment r e q u i r e s  and  Resolution the  a more s p e c i f i c  whose ages or s t r a t i g r a p h i c l o c a t i o n i s b e t t e r  of  character  study of  the of  samples  constrained.  the  Page  5.  5.1  GEOCHRONOMETRY  INTRODUCTION  Age methods  determinations on  14  Britannia. Coast  samples  Young  Plutonic  deformational Jurassic age  110  for  or  (Roddick  et  This  intrusions events.  the a l . ,  suggests  relationships  the  are  and  1979) new  within  This is  group,  with  K - A r and  volcanic  the  dates  have or  are  somewhat  older  is  of  been  Early  reset  by  Cretaceous  than  currently  Cretaceous  interpretations  at  provisionally  -  which  Rb-Sr  later  Jurassic  Early  southwestern  suite  to  possibly related  strata  Britannia  the  interpreted  However, Rb-Sr  pendant  that  by  altered  Cretaceous.  Britannia for  from  attempted  K-Ar dates  Early  expected  were  was  correlated  Gambier  Group.  stratigraphic  coastal  British  Columbia  may  be  warranted.  All  analyses  University Harakal.  of  were  British  Potassium  done  at  Columbia.  constants given  in  used, Tables  described and 5.1,  the 5.2  R.  by  apparent 5.3.  ages  C.  J .  time  were  by K .  Analytical  Analytical  with  The  strontium  L . Armstrong.  i n Appendix  and  and  were  isotopic determinations  d i r e c t i o n of  are  analyses  strontium  Scott  procedures  Argon  rubidium  and  the  Geochronology Laboratory at  analyses,  concentrations, under  the  results,  the  designations  are  TABLE 5.1  SAMPLE Field Lab  MC83-633 -6384  Potassium-argon data f o r v o l c a n i c rocks from B r i t a n n i a Ridge, southwestern B r i t i s h Sample s i t e s a r e l o c a t e d on F i g u r e s 3.2 and A . I .  LOCATION Northing E a s t i n g lat(°N) long(°W)  5495850 490460 49°36'25" 123°07'20"  ROCK TYPE [Package-Unit] (Comment)  4 0  %K (+ )  B a s a l t (1-7] (altered;?, low K 0 , low CaO ) 6  2  Ar*  Ar* - —  Columbia.  4 0  —  1  ^total  1  0  ^  APPARENT AGE (Ma)  z  STP/g  J  TIME  0.255 (0.001)  0.652  0.920  90.5 + 3.2  Late Cretaceous  7  MC83-619 -6378  5494640 491180 D a c i t e (2-9) 49 36'01" 123°06'52" ( s l i g h t l y a l t e r e d 5 )  2.27 (0.03)  0.879  7.166  79.5 +2.9  Late Cretaceous  MC83-640 -6392  5495170 490090 C r y s t a l l i t h i c t u f f 12-10] 49°36'08" 123°07'16" ( q u a r t z - r i c h )  1.72 (0.02)  0.723  5.557  81.3 • 2.9  Late Cretaceous  MC83-657  5494980 489740 Q u a r t z - s e r i c i t e s c h i s t [2-11] 3.26 49°36'08" 123°07'48" (contact o f packages (0.03) 2 and 3)  0.961  10.768  83.1 + 3.0  Late Cretaceous  MC83-625  5494630 490480 Crystal l i t h i c tuff 49°36'02" 123°07'24" ( s e r i c i t i z e d )  0.691  3.634  81.6 + 3.0  Late Cretaceous  1. 2. 3. 4. 5. 6. 7.  o  [3-13]  1.12 (0.03)  Argon analyses are by J . Ilarakal and potassium analyses are by K. S c o t t ; a l l analyses were done a t the Goochronology Laboratory, The U n i v e r s i t y of B r i t i s h Columbia. Ar* i n d i c a t e s r a d i o g e n i c argon. Constants used are from S t e i q e r and Jager (1977): = 0.581 x 1 0 y r ~ ' ; = 4.962 x 10"' yr K/K = 1.167 x 10 . E r r o r s are one standard d e v i a t i o n . Time d e s i g n a t i o n i s from Armstrong (1978) and Harland e t a l . (1982). A l t e r a t i o n i s d e f i n e d on Figure 4.2. r^O danains are d e f i n e d on F i g u r e 4.4. CaO domains are d e f i n e d on Figure 4.6. _ l u  e  u  b  PJ (D  TABLE 5 . 2 .  R u b i d i u m - s t r o n t i u m a n a l y s e s o f v o l c a n i c r o c k from B r i t a n n i a R i d g e , s o u t h w e s t e r n B r i t i s h Columbia. l o c a t e d on F i g u r e s 3 . 2 and A . I , a r e p l o t t e d on F i g u r e 5 . 1 . Dates a r e c a l c u l a t e d i n T a b l e 5 . 3 .  Sample Number Field Lab 1  Sample d e s c r i p t i o n Rock t y p e (comment) [Package-Unit 1  MC83 - 6 0 8  6369  MC83 - 6 0 9  6370* Rhyodacite  MC83 - 6 1 0  6372  Rhydacite  MC83 - 6 1 9  6378  Dacite  (Victoria  dome, h i g h  yea 3 -620  6379* Dacite  (Victoria  dome)  MT83 - 6 2 6  6380* A n d e s i t e - b a s a l t  MC83 631  6382  Basalt  (low  K^.CaO;  6384  Basalt  (low  K-fi ,  3  MC83 6 3 3  3  MC83 634  6385  Basalt  Dacite  (altered ,  l o w CaO )  5  [1-7]  7  [3-14] (altered )  (Pit  13-14]  5  (low  6  K20 ) 6  [2-9] K^ )  [1-2]  6  high  Na 0) 2  [1-7] [1-7]  CaO ) 7  dome, h i g h  (2-9]  K20 ,Ti0 ) 6  2  [2-9]  Northing Easting (Latitude) (Longitude)  5494940 49°36'07") 5495076 4 9 ° 36" 1 3 " ) 5494990 49°36'12") 5494640 49°36'01") 5494570 49°35'58") 5496230 49°36'32") 5495840 49°36'25") 5495850 49°36'25") 5495500 49 36'20") 5495060 49°36'10") 5495170 49°36'13")  489800 (123°07*54") 489740 (123°07'56") 491180 (123°06'52") 491380 (123°06'42") 491540 <123°06'25") 490580 (123°07*15") 490460 (123 07 20") 490430 (123°07'27") 490230 (123°07'36") 489870 (123°07 50")  o  MT83 644  6397  MC83- b ;4  6 4 0 4 * D a c i t e Dyke  c  [2-111  Chert/Exhalite (Mine  dyke)  I -18]  491300  o  Sr ppm  Rb ppm  415  13 1  0 091  0 7044  311  30 2  0 282  0 7040  406  32 4  0 229  0 7038  233  40 9  0 506  0 7051  316  31 0  0 283  0 7043  458  4 5  0 029  0 7036  458  2  1  0 013  0 7040  543  10 1  0 054  0 7044  399  9 9  0 071  0 7041  12  14 1  3 504  0 7117  236  33 5  0 409  0 7047  21  3  0 229  0 7036  B /  Rb/ Sr (+2%)  Data,  B b  B /  Sr/ Sr (+0.0001) b b  l  ,  HVAH 4  Dante  11-?]  49°37'48")  (123°05'27")  269  HFAH- 6 A  Basalt  d-?l  49°37'44")  (123°05'15")  512  6 6  0 037  0 7033  [1-?]  49°39'02")  (123°05'52")  477  4 5  0 027  0 7036  [1-?]  49°38 11")  <123°04'05")  442  2 4  0 016  0 7035  C j A  4  HKAH- 17* HEAH- 2 6 A  1. 2. 3. 4. 5. 6. 7.  Quartz 4  Dacite  basalt  ,  S a m p l e s n a r k e d by * a r e u n a l t e r e d a s d e f i n e d o n F i g u r e 4 . 2 . A n a l y s e s , of w h o l e r o c k s a m p l e s , were done a t t h e G e o c h r o n o l o g y L a b o r a t o r y , b y K. S c o t t u n d e r t h e d i r e c t i o n o f R . L . A r m s t r o n g . Whole rock K-Ar a n a l y s i s i s r e p o r t e d i n T a b l e 5 . 1 . A n a l y s e s a r e from Heah ( 1 9 8 2 ) . A l t e r a t i o n i s d e f i n e d on F i g u r e 4 . 2 . K 0 domains are d e f i n e d on F i g u r e 4 . 4 . CaO d o m a i n s a r e d e f i n e d o n F i g u r e 4 . 6 . 2  The U n i v e r s i t y  of  British  Columbia,  Table  5.3  Isochron  C a l c u l a t e d Rb-Sr i s o c h r o n d a t e s f o r t h e B r i t a n n i a R i d g e v o l c a n i c s u i t e , s o u t h w e s t e r n B r i t i s h C o l u m b i a . A n a l y s e s a r e l i s t e d i n T a b l e 5.2. Data and s e l e c t e d i s o c h r o n s (*) a r e p l o t t e d i n F i g u r e 5.1. Subset  Number of Points  1 *  All  2*  Britannia  samples Ridge  Sample Numbers  L i n e Parameters intercept ( S r ) i  15  ( see T a b l e  5.2)  11  ( e x c l u d i n g Sky P i l o t Mounta i n , see T a b l e  3  "Unaltered"  6  626, 654  619,  620,  4  "Best?"  3  626,  620,  609  5*  Altered  Basalt-Chert 2  6  Package 1  7  609,  Time  0..7037 + .03  1 59 + 31  Late  Jurassic  0..7038 + 1  1 46 + 25  Late  Jurassic  0 .. 7033 + 2  231  5.2) 610,  0.. 7035  •  2  644 , 633  0 .. 7043 + 2  4  626,  0..7041  Package 2  3  634 , 620,  8  Package 3  3  609,  9*  Packages  6  634 , 620, 654  2 and 3  Age^ (Ma)  631 , 608 , 633  +  1  41  Triassic  1 54 + 7 2  meaningless  1 49 + 1 1  Late  undef i n e d  meaningless  Jurassic  619  0., 7038 + 3  1 63 + 54  Late  610 , 654  0., 7026 + 3  357 + 60  meaningless  0.. 7036 + 2  1 67  Middle  619,-  609,  610,  37  Jurassic  Jurassic  1. I s o c h r o n d a t e s were c a l c u l a t e d u s i n g l e a s t s q u a r e s f i t t i n g methods o f York ( 1 9 6 7 ) . The programme was w r i t t e n f o r HP-85 m i c r o c o m p u t e r by R. L. A r m s t r o n g . E r r o r i n ' S r / " S r i s 0.0001; Rb/Sr r a t i o i s a s s i g n e d 2 % e r r o r when Rb and S r c o n c e n t r a t i o n s a r e o v e r 50 ppm, o t h e r w i s e a p r o p o r t i o n a l e r r o r o f r a t i o d i v i d e d by l o w e s t ppm. Decay c o n s t a n t ( S t e i g e r and J a g e r , 1 9 7 7 ) : = 1.42 x 10 yr . Errors are 1 standard d e v i a t i o n . . 8  H3 uq  Page  5.2  K-AR  DATING  K-Ar  age  determinations  of v o l c a n i c rock from samples from  the B r i t a n n i a pendant.  from  f o r samples 619  unit  and  7 i n package 1,  w i t h c a l c i t e amygdules.  samples  633  i n T a b l e A. 5, i s i n Table  i s an a l t e r e d  I t has medium to low  K0  and  4.1.  pillow  basalt  ( F i g . 4.4)  2  compared t o normal s u b a l k a l i n e b a s a l t s ( F i g . 4.6).  samples from  package 2 were s e l e c t e d .  Sample 619  n o n - p o r p h y r i t i c d a c i t e with quartz phenocrysts elongated v e s i c l e s .  This altered  sample has  v a l u e compared t o o t h e r samples from  (unit  and  u n i t 9, and  of the d i s t i n c t i v e green m o t t l e d s c h i s t Britannia orebodies. 11 ) taken possibly  from fault  Sample 657  directly  bedded s u l p h i d e s i n the open p i t s  "paper" overlies  tuff  generally  K-Ar  from  unit  13  less altered  data  ( T a b l e 5.1)  ages f o r the a l t e r e d  3.  i n package 3.  than u n i t  high  a higher  Sample 640  10), t h a t h o s t s  group i n t o two  2  schist  is the  (unit  p h y l l i t e , which i s the F a i r v i e w Z i n c  Sample 657  close  is a  crystal  U n i t 13 i s s i m i l a r  10 i n package  K0  MgO  ( F i g . 3.2; s e c t i o n A-A')  to the c o n t a c t between packages 2 and  is a  slightly  is quartz-sericite  a band of very a l t e r e d r e l a t e d , and  (unit  and  Three  9)  a relatively  v a l u e than normal s u b a l k a l i n e d a c i t e s ( F i g ; 4.7).  lithic  five  Representative  l o c a t i o n s of the samples a r e  whole rock c h e m i s t r y  low CaO  were made on  each of the t h r e e packages were s e l e c t e d .  D e s c r i p t i o n s and  Sample 633,  i n T a b l e 5.1  114  t o , but  2.  Late Cretaceous  apparent  v o l c a n i c r o c k s : ( 1 ) an o l d e r date o f 90.5 +  Page 115  3.2 Ma  f o r b a s a l t of u n i t  average date of 81.4  7 i n package 1, and  +_ 3 Ma  (2) a younger  f o r the f o u r samples from packages 2  and 3. The a p p a r e n t age f o r the b a s a l t of u n i t e q u i v a l e n t to d a t e s o f 90 Ma,  94 Ma,  and 95.1  7 i s approximately _+ 3.3 Ma  1982) f o r the Squamish and F u r r y p l u t o n s and t h e i r contacts.  Because the pendant r o c k s and s u l p h i d e  (Heah,  intrusive mineralization  are n e c e s s a r i l y o l d e r than the L a t e C r e t a c e o u s i n t r u s i o n  and  d e f o r m a t i o n , the d a t e of package 1 i s i n t e r p r e t e d as r e s e t i n t r u s i o n of the Mountain Lake p l u t o n g r a n o d i o r i t e intrudes unit may  be r e l a t e d  7.  The younger age o b t a i n e d  (unit  for units  by  20) which  i n package 2  t o the f i n e r g r a i n e d nature of the samples or  represent r e s e t t i n g  may  by an undocumented i n t r u s i v e event and/or by a  r e l a t e d major d e f o r m a t i o n a l e v e n t .  5.3 RB-SR DATING  Samples  f o r rubidium-strontium analysis  t h r e e packages d e f i n e d four basalt  samples  from u n i t and  i n S e c t i o n 3.1, c o n s i s t e d  (one from u n i t  package 2: f o u r samples  (Table 5.2)  o f : (1) package  2 and t h r e e from u n i t  ( t h r e e d a c i t e s of u n i t  from a l l  9, and one  7 ) , (2) chert  11), (3) package 3: two r h y o d a c i t e samples from u n i t  (4) one d a c i t e dyke sample from u n i t  l o c a t e d on F i g u r e s  3.2  and A.1; d e t a i l e d  major element c h e m i s t r y are i n Table A . 5 .  18.  1:  14,  The samples are  sample d e s c r i p t i o n s  and  Page  Analyses  f o r the  11  from 4 r o c k s  from Sky  of  area,  the study  Sky  Pilot  1.  "Unaltered"  and  a r e p l o t t e d as  strontium  samples are  Pilot  i n Table  Mountain  Rb-Sr  values  (Heah, 1982), d i r e c t l y  have been i n c l u d e d i n the T a b l e  and  north  Figures.  Mountain samples a r e c o r r e l a t e d t e n t a t i v e l y w i t h samples, d e f i n e d i n F i g u r e solid  packages 1,  D's  2 and  to represent, 3, and  Nine t r i a l  dates  w i t h v a r y i n g degrees of c o n f i d e n c e . 1,  Large e r r o r s , due  t o low Rb  2, and  stratigraphic  are  values  with  i n Table  of  The  5.3.  isotopic yield  best  (<50  ppm)  6 and  and  5.1.  alteration  Time d e s i g n a t i o n s  from T r i a s s i c 4,  from  relationships,  i s o c h r o n s because of the  Isochrons  squares,  9--have been p l o t t e d on F i g u r e  a s s o c i a t e d w i t h most i s o c h r o n s .  Cretaceous.  using c i r c l e s ,  are  are  l a r g e e r r o r s , which  through J u r a s s i c to E a r l y  8 are v e r y p o o r l y d e f i n e d  or  meaningless.  Isochron  9,  considered  to approximate most c l o s e l y ft 7 ft  the B r i t a n n i a Ridge v o l c a n i c s , has 0.7036 _+ 2 and  a c a l c u l a t e d age  an  of 167  initial  0 /  _+ 37 Ma.  Sr/  0 D  the age  of  ft  Sr  This  *  and  i s o c h r o n s , some of which have been  based on a l t e r a t i o n and  ranges of age  Rubidium  through s e l e c t e d s u b s e t s  "fits"--isochrons  package  i n d i c a t e d by  C a l c u l a t e d a p p a r e n t ages  data,  i n c o n c l u s i v e f o r the  5.1.  p o i n t s on F i g u r e 5.1,  isochrons  are  r e s p e c t i v e l y , samples  dykes.  varying e r r o r s f o r nine t r i a l drawn through the d a t a  4.2,  symbols on F i g u r e  r a t i o s a r e p l o t t e d on F i g u r e 5.1  t r i a n g l e s and  allow  5.2.  116  value  of  isochron,  FIGURE 5.1  Ruba ciium-st r o n t i urn i s o t o p e p l o t f o r s a m p l e s f r o m t h e B r i t a n n i a R i d g e a r e a , s o u t h w e s t e r n B r i t i s h Columbia. D a t a a r e i n T a b l e 5.2. I s o c h r o n s a r e numbered a s i n T a b l e 5.3. Sample 6 4 4 was u s e d o n l y i n t h e c a l c u l a t i o n o f i s o c h r o n 5. D a t a f r o m Sky P i l o t M o u n t a i n ( H e a h , 1982) a r e i n d i c a t e d by x. Symbols a r e t h o s e of F i g u r e 4.1.  Page  based on the g e o l o g i c a l l y most r e l i a b l e samples from packages 2 and  3, but  subset,  excludes  i s composed of  samples from package 1  t h a t have been demonstrated to be a l t e r e d (Chapter The  initial  strontium  r a t i o and  9 are g e n e r a l l y supported on the e n t i r e data B r i t a n n i a Ridge  b a s a l t by  seawater  on F i g u r e  5.1  (Table  5.2),  exchange d u r i n g  ( M o t t l and  Holland,  line  4.2).  by  isochron  2 based r e s p e c t i v e l y  data  e x c l u s i v e l y from  the  and  633  1978).  Sr r a t i o v a l u e s  This  of  is indicated  from package 1, where an progressive  from u n i t 2,  from u n i t 7.  consistent  hydrothermal a l t e r a t i o n  ( i s o c h r o n 6) r e f l e c t s  " u n a l t e r e d " sample 626  samples 608  1 and  and  ( i n s e t ) by b a s a l t data  almost v e r t i c a l  higher  isochrons  Fig.  defined  f o r the a l t e r e d b a s a l t samples a r e  observed c h e m i c a l  from the  a J u r a s s i c age  4,  suite.  High Sr r a t i o s with  set  by  118  Depletion  in basalts result  alteration  to the more a l t e r e d of Ca and  from m i x i n g  Sr,  and  with  Q "7  isotopically  heavy  t h a t the h i g h e s t  Sr-rich  seawater.  Sr r a t i o v a l u e s  i n Table  where i n t e n s e seawater i n t e r a c t i o n  samples and Figure  5.1.  provides  ratios  5.2  are  significant  from package 2  r e l a t e d to the d e p o s i t i o n of  the massive s u l p h i d e d e p o s i t s c o u l d be Sample 644  I t might be  expected.  significantly  higher  p l o t s w e l l beyond the c l u s t e r of o t h e r T h i s sample, from u n i t 11,  than the data  other  points  on  i s a c h e r t which i s  p o s s i b l y an e x h a l i t e based on  i t s close s t r a t i g r a p h i c association  with  a d d i t i o n of seawater s t r o n t i u m  known ore d e p o s i t s .  The  to  this  Page 119  c h e r t cannot  be a s s e s s e d , but i t would have t h e e f f e c t o f 87  increasing it  t h e °'Sr c o n t e n t .  would be w i t h o u t  interesting Isochron  t o note  T h i s makes t h e minimum age o l d e r than  seawater s t r o n t i u m a d d i t i o n . sample 644 i s i n t e r s e c t e d  It i s  by i s o c h r o n 9.  5, p r o j e c t e d between samples 644 and 633 ( F i g . 5.1), both ft 7  a p p a r e n t l y e n r i c h e d i n °'Sr, has a c a l c u l a t e d age o f 149 +_ 11 Ma, consistent and  ( e r r o r excepted) with the Late J u r a s s i c  i s o c h r o n s 9, 1  2. Initial  Sr r a t i o s  i n T a b l e 5.3 range from  _+ 2 ( e x c l u d i n g i n t e r c e p t s from average  0.7037, which c o r r e s p o n d s  w i t h upper mantle s o u r c e s initial  undefined  Sr r a t i o s  i s o c h r o n s 4, 6 and 8) and  to i n i t i a l  (Faure, 1977).  0.7033 + 2 t o 0.7043  S r r a t i o s o f magmas  T h i s s m a l l range o f  i n d i c a t e s t h a t a v a l u e of 0.7037 i s a p p r o p r i a t e  for  use i n age c a l c u l a t i o n s and s u g g e s t s  and  hence t h e Goat Ridge and B r i t a n n i a  that the three  packages,  formations, evolved  from a  common o r i g i n and might be co-magmatic.  Whole rock ages, i n T a b l e volcanic for  strontium i s o t o p i c compositions  provide  5.3, o f M i d d l e  f o r the a l t e r e d  to Late J u r a s s i c  s u i t e on B r i t a n n i a Ridge.  s e t does n o t a l l o w  age d e t e r m i n a t i o n s o f i n d i v i d u a l packages o r d i s c r i m i n a t i o n  among them on t h e b a s i s o f age. the assumption after of  The d a t a  estimated  C a l c u l a t i o n of isochrons r e q u i r e s  t h a t t h e system has remained c l o s e d t o Rb and Sr  crystallisation  (Faure, 1977).  seawater o r h y d r o t h e r m a l  alteration  Therefore  t h e noted  effects  r e q u i r e t h a t t h e proposed  Page  Jurassic  dates  reinforced  by:  be  considered  (1)  interpretation,  the  and  Britannia  pendant  (Roddick,  1965).  (2)  based  tentative.  errors, the on  a  This  caution  which  allow  a  expected  Early  Cretaceous  correlation  with  120  is  Cretaceous  the  age  Gambier  in  the  Group  Page  6.  6.1  INTERPRETATION  AND  CONCLUSIONS  INTRODUCTION  An  i n t e r p r e t a t i o n of the v o l c a n i c and  d e p o s i t i o n a l environment  for  the a c c u m u l a t i o n  can  be made from u n i t s d e s c r i b e d w i t h i n the  on  the e a s t e r n  of the B r i t a n n i a massive s u l p h i d e  s e c t i o n of B r i t a n n i a R i d g e .  u n i t s w i t h i n them t h a t r e p r e s e n t continuous  succession  Miocene i s l a n d  r e l a t e d to f e l s i c  volcanic  as h o s t  to  form a episodes  activity. volcanogenic the  those  i n the F u r r y Creek  of  valley:  a b a s i s f o r more d e t a i l e d s t r a t i g r a p h i c and allows  the p a l e o v o l c a n i c environment and d e p o s i t s w i t h i n i t , (3)  identifies  eruption  and  v o l c a n i c framework f o r c o r r e l a t i o n  i n v e s t i g a t i o n s , (2)  volcanogenic  packages,  arcs.  the u n i t s i n the Jane B a s i n w i t h  structural  packages d e f i n e d  i n Archean g r e e n s t o n e b e l t s and  I n t r o d u c t i o n of a simple  provides  The  to f e l s i c  S i m i l a r v o l c a n i c sequences a r e d e s c r i b e d massive s u l p h i d e d e p o s i t s  three  deposits  several volcanic facies,  of m a i n l y m a f i c  with m i n e r a l i z e d horizons  (1)  121  r e c o n s t r u c t i o n of  l o c a t i o n of m a s s i v e  sulphide  emphasizes the e x p l o r a t i o n p o t e n t i a l f o r  massive s u l p h i d e s  favourable  the  f o r the  e a s t of the B r i t a n n i a Mine, and  s t r a t i g r a p h y t h a t might be  elsewhere i n the B r i t a n n i a - I n d i a n R i v e r  recognizable  pendant.  (4)  Page  6.2  LOCAL GEOLOGY,  6.2.1  dipping  of  rocks  packages  stratigraphy. grouping  that  designations.  the  mine  at  depth.  within  packages  and  3.  close  to  several  horizons  mine,  and  Determination  of  stratigraphic  and  suspected strata the west  pose Jane to  representing  difficult.  movement more Basin  east  to  facies  the  "pre-"  rocks,  and  within  "post"  package  faults,  represent  dominant  from  within  orebodies  in  valley  primarily  is  package  for  a  complex  mountainous  units  occur  deformation  offsetting  C o r r e l a t i o n of  2,  mineralization  eruptions, in  pile  dominantly  developed  relationships  Furry Creek  change  to  packages  the  exposure  major  problems.  volcanic  unknown p o t e n t i a l  repeated  Poor  along  a  local  lithologic  hangingwall designations  respectively.  is  of  describing  finally  sulphide  of  of  of  occur  the  to  moderately  general  useful  between  Alteration  for  and  deposits  are  chert  a  three  character  pyroclastic,  3,  pile  framework  in  2 and  1,  faulting  the  1 and  footwall,  and  from  to  into  provide  change  that  Mineralized  paleovolcanic  of  packages  contacts  surface,  packages  strong  known o r e  The  horizons  present  Ridge  divisions provide  Most  sequence.  supports  a  the  Package  stratigraphic  Britannia  magmatic,  ore  the  three  reflects  primarily  at  on  provides  The  sedimentary.  2,  AND D I S C U S S I O N  Introduction  Division  from  SUMMARY  122  terrain  large  across  blocks the  complicated  subaqueous  map  by  basinal  Page  deposition, felsic  to  interpretation  monocline  with  hangingwall to  s h a l l o w and  17,  similar  generally  generally and  Figure  make  3.2.  indicate  be  a  units  too  environment  of  map  area  and  to  an  above  The  exist.  detailed  of  units  1 to  broad  the  length  for  volcanic  of  faults  stratigraphy and  of  between  along  interpretations, units,  many  Repetition  across  time-stratigraphic  numbered  although  unknown d i s p l a c e m e n t More  and  units,  overlap  extend  approximate  mine  sequence,  apparent  stratigraphic  into  simple.  relationships  and  as  footwall,  younging  complications.  refined  6.2.2  might  Deformation  for  is division  facies  or  units.  Packages  Package felsic  j_ (units  volcanism.  related  unknown  breccia  economic  spilitized form  Felsic  exhalative  associated  domes  subaerial  packages  conformable  divisions difficult  further  eruption  three  unconformable  needed the  the  follow  lithological  packages  of  sequences  overlapping  7),  possibly  domes.  The  1  a  123  mafic  activity and  flows, or  3 and 4 ) ,  forms  the  volcanism, produced  tuff,  potential.  a platform  (units  7),  which Within  at  the  small  host  mafic  top  package  domes  intruded  and o v e r l a i n  by  by  1,  and  and  accumulations  of  1 , 1 ,000 m o f  f l o w - b r e c c i a and a g g l o m e r a t e ridge,  for  of package  felsic  sulphide  base  local  felsic  (units  rhyolite  tuff  (unit  2 and  plugs 5).  and  Page 124  Submarine p y r o c l a s t i c flows volcanism,  form f a n s  (unit 6), r e l a t e d to the f e l s i c  up t o 350 m t h i c k between f l o w s .  rocks  of package 1 a r e s u g g e s t i v e  of shallowing  A change from massive flows  and p i l l o w l a v a s t o i n c r e a s i n g amounts  of v o l c a n i c l a s t i c s , lapilli  thin-bedded t u f f ,  t o emergent  The  pumice and a c c r e t i o n a r y  upwards i n the package i s c o n s i s t e n t w i t h  an emergent v o l c a n i c cone on a m a f i c p l a t f o r m The  volcanism.  the b u i l d i n g of  (Kokelaar,  1986).  reworked n a t u r e o f beds i n u n i t 6 and pumice i m p l i e s  to s u b a e r i a l e x p l o s i v e eruptions Accretionary  lapilli  shoaling  ( S t i x e t aJL. , 1 986).  w i t h i n massive beds o f f e l s i c  tuff  ( u n i t 5)  may be i n d i c a t a t i v e o f a s u b a e r i a l environment above t h e f e l s i c domes. the  M a s s i v e and d i s s e m i n a t e d  t o p o f package 1.  flow-breccia  This chert  sulphides  occur  within chert  s u r r o u n d s p i l l o w s and  i n u n i t s 2 and 7, i s w i t h i n r h y o l i t e  the margins o f domes o f u n i t 3, and i s i n t e r b e d d e d t u f f s o v e r l y i n g the domes.  Units  i n t o each o t h e r ,  flow d e p o s i t s . flows  The l a t t e r  flow  breccia at  with  felsic  5 and 6 a r e t e n t a t i v e l y  c o r r e l a t e d on t h e b a s i s o f s i m i l a r fragment t y p e s . gradational  near  represent  These u n i t s ,  p y r o c l a s t i c f a l l o u t and  form submarine f a n s  o f f t h e f l a n k s o f t h e r h y o l i t e domes.  between b a s a l t  The c o n t a c t  between  package 1 and 2 i s marked by the i n t r u s i o n o f a major d a c i t i c dome complex w i t h  related pyroclastic tuff  Package 2 ( u n i t s 8 t o 12), l o c a l l y package 1.  I t c o m p r i s e s an e x t e n s i v e  t h i c k that covers  a p p r o x i m a t e l y 2 km  and s u l p h i d e  intrudes  mineralization.  and o v e r l i e s  dome complex  ( u n i t 9) 350 m  i n the mapped a r e a .  Black  Page  argillite and  and  breccias  bleached,  package  developed  felsic  on  flank  tuff  interpreted  probably  are  with  by  relationship  represents  fallout  lithic  linked  during  the  the  tuffaceous  Stringer,  orebodies  massive  basins  marginal  of  dome  to  and  of of  and  9 are of  within  during  quiet  crater.  towards  package  on  the  2.  margins  sulphide  breccias  These  and  of  the  of  overlying  a  flat 11  in  the  between  dacite  dome  top  in  of  of  unit  the  8.  300 m  stratigraphically  dome  accumulations  Hydrothermal a l t e r a t i o n  The  appearance  occur  the  flow  Basin  the  are  basin  Unit  periods  increasing  interbeds  The  depressions  of  the  and  sheet.  -  extrusion  is  subaqueous  flow.  by  flows  complex.  pyroclastic  a  interbedded  suggestive a  by  feldspar  with  ignimbrite  mineralized chert  bedded  flow  complex.  or  indicated  thickness  an  formation  intrusion  and  ten  10  felsic  clasts  to  of  dome  marked  complex,  pyroclastic  non-welded  deposited  is  stratigraphic  8)  a  to  layers  (unit  10,  9),  five  dome  flows  sedimentary  A  the  unit  (unit  least  tuff.  dacite  units  the  of  the  blanket, of  fragments  to  deposits  tuff  eruption  development  of  as  mafic  is  of  argillite  characteristics  sheet  in  related  blanketed  ignimbrite  the  western  overlie  contact  felsic  and  and  related  within  breccia  m thick  At  7)  includes  black  500  felsic  the  that  intrusive  m of  dome  complex  (unit  The  500  and  pulses  1.  conformably  by  turbidites  crystal  rocks  breccia  basalt  represented  shape  of  altered  porphyritic basin,  pyroclastic  125  complex. occur  within  pyroclastic related  to  facies  the  Page  d e p o s i t i o n of the o r e b o d i e s (chlorite) schist  The altered limit  (unit  i s represented  quartz-sericite  12).  c o n t a c t between packages 2 and felsic  by  126  3, d i v i d e s  u n i t s from f r e s h u n i t s .  of known e c o n o m i c a l l y  hydrothermally  I t a l s o marks the  significant  accumulations  upper  of massive  sulphides.  Package _3 ( u n i t s 13 and  pyroclastic  and  at l e a s t  volcanic  14)  in unit Ash  250  14  m of b l a c k a r g i l l i t e  fragmented by i s evidence 15,  volcanic a c t i v i t y  the map  unit  area  volcanism  t o 350  the  m of f i n e ash  t h a t caps the  l e n g t h of F i g u r e  m of massive  3.2.  Unit  above and  felsic  related  fallout  around the  flows.  d e p o s i t s o r waning  localized  volcanic activity i n the g r a d u a l  from t u f f a c e o u s t o  Numerous u n c o n f o r m i t i e s  felsic  flows.  subsided.  Waning  change i n c h a r a c t e r  i n the s t r a t i g r a p h y r e f l e c t  7 ) , contemporaneous w i t h  r h y o l i t e domes ( u n i t  has  across  of  sedimentary.  c o m p l e x i t i e s of a v o l c a n i c environment. ( u n i t s 2 and  interbedded  r e p r e s e n t s q u i e t submarine d e p o s i t i o n  i s also reflected  the package r o c k s  Argillite  13 flows  f o r subaqueous d e p o s i t i o n of the  represents  16,  after  c o n t a c t w i t h water.  tuff  entire  the margins of massive or welded p y r o c l a s t i c  tuff, unit  Argillite,  i n c l u d e s up  f l o w s g r a d a t i o n a l t o 100  sequence a c r o s s  represents (unit  felsic  to 17),  the  E x t r u s i o n of b a s a l t s  the emplacement of  localized  3), r e s u l t e d i n o v e r l a p p i n g r e l a t i o n s h i p s  Page  among  units  in  package  domes  deforming  and  1.  Upward  piercing  breccias  piercing  sediments,  possibly  from  same  the  relationships  at  package  east  top  of  associated  Strong  1 is a  alteration  associated altered  with  with  rocks  within  in  related  hydrothermal  sulphides. primarily  hangingwall  a  in  the  mine  within  3 and  later  within  the  intrusions  Lateral  variation  from  west  to  environment.  2  is  usually  deposits.  sequence,  package  2,  where  interpreted  to  have  that  hot  or  sulphide  massive of  diatreme  change  1 and  i n CaO i s  solutions  felsic  complicated  domes.  facies  massive  alteration  package  the  of  eruptions  result  packages  depletion  Alteration seawater  around  within  MgO a n d  own c a r a p a c e s ,  repeated  to  movement  s h a l l o w i n g submarine  enrichment to  and  due  stratabound  occur  their  v o l c a n i c vent  stratigraphic the  diapiric  127  formed units  the  of  lavas.  most  been  massive  package  Only  crosscutting  The  1  rocks  dykes  are  is in  the  relatively  unaltered.  6.2.3  Structure  Deformed  strata  southwest-dipping  m o n o c l i n e on  gently  west-plunging  mapped  area.  formation  This  fold,  the  whose  similar  overlying to  those  of  Figure  3.2  southern  limb  of  anticlinal  axis  lies  interpretation  conformably  interpretation  map a r e a  supports  the of  Goat  a  younger  Mountain  earlier  mine  a  form  a  large, north  of  Britannia  format i o n - - a n reports  the  Page  (Schofield,  1926;  recent  detailed  (Payne  et  a l . ,  McCullough,  study  of  1980).  the  1968),  but  deformed  planar  developed  across  the  entire  extensive  within  the  hydrothermally altered  Britannia  open  traced  along  affected  pits.  strike  Package and  therefore  by d e f o r m a t i o n  on  the  considered  to  emplacement  of  the  domes.  the  "Britannia  Britannia  pendant,  semi-conformable volcanogenic deformed  Shear  zone  massive  between  the  of  example  of  the  massive  sulphides  alteration entire is  and  of  stratigraphic  the  with  steeply  southwesterly  linear  of  packages  fissures.  Zone  at  sequence.  stratabound,  domes  50  to  a  2,  Shearing  that  the  the  which within  can  of  with  the the  structure  large,  in  linear  rocks .related  more  competent and  best  known  but  zones  smaller horizons  m wide  foliation trend  of  the  of  and  have  been  this  zone  is  the zone  schistose  and  rocks  This  dacite  localized  unevenly  with similar  shear  bedding.  rhyolite  might  of  throughout  3.2  zone  to  preferentially  largest  Figure  be  been  associated  several  300  the  deformation  Within  to  most  Much  became  of  is  have  map.  as  is  deposits  contacts  prominent  here  is  and  dipping  parallels  1 and  most  pendant,  occur  crudely  roughly  unit  appear  influence  alteration  a  schistosity  the  more  within  penecontemporaneous  deposits  Shear  within  shearing  but  rocks  the  a  foliation  hydrothermally altered  confining  The B r i t a n n i a  of  with  sulphide  3.2,  and  not  interpreted  sulphide  packages.  type  be  Zone",  is  do  scale  is  felsic  Figure  boundaries  deformation  The  of  odds  Britannia  Pervasive axial area  at  128  along  developed;  Page  massive, occur  weakly  next  to  sheared  one  to  the  original  to  deformation.  rock  transect  lithologic  type.  from  to  the  to  andesitic  of  units  of  related  schist  with  are  example,  at  changes  quartz-sericite (unit  both  prior  commonly o b s c u r e s  of  zone  is  or  alteration  coincident  For  breccia  alternate  shearing  degree  and  zones  schistose  schist  is  schist,  boundaries. a  sheared  degree  shearing  Locally,  (Fig. A.1)  contact  and  (chlorite)  original  the  The  type,  Intense  sericite-chlorite  highly  another.  rock  quartz-sericite  watershed  and  129  the  discordant the  Vancouver  composition  schist  and  as  from  it  2)  to  felsic  recognized  to  have  crosses  tuff  (unit  10) .  The  B r i t a n n i a Shear  association Britannia  Mine  focus  of  1969;  Payne  steeply along  with  faulting, Hodgson  The  (1969)  east  strike  the  to of  at  the  is  of  as  that  the  can  be  terminated  to  1929)  and  has  (McCullough,  of  describe as  shear  fissile  traced by  shear  pendant.  A l l the  the  Hodgson, the  the  broad,  axis  deformation, were  13  centered.  km f r o m  Range zone  east-southeast  of  rock,  for  Coast  been  1968;  deformation  south-dipping  Basin,  development  activity,  zone  important  the  Britannia anticline a  an  in  al.(1980)  complex  the  it  steeply  part  et  hydrothermal  it  Jane  studies  of  and  early  James,  Payne  zone  m wide,  where the  eastern  and  described 450  1926;  1980).  metamorphism  east-west in  a l . ,  volcanism,  approximately Sound,  reports  south-dipping  which  was  Britannia orebodies  (Schofield,  numerous et  Zone  Howe  intrusions.  changes  (McCullough,  Britannia  from 1968)  orebodies  Page  occur in  within  a  thickness  Basin,  300  1.5  as  to  km l o n g  follows  1,200  Victoria,  and  900  limits  the  shear  shear  of zone  bedding  schistosity contacts, had  is  mapped  as  McCullough, separated,  here,  (units  11,  10,  zone  are into  and  3.2.  steepening sequence fold.  3.2 of  forms  The  that  the (on  the  dips a  or  map a r e a  lineations folds  occur  units  of  in  package  indicate in  less  are  2.  not  rock  the  deposits,  600  found  type.  types  m  at  the  Within  the  lithologic  within  of  the  bedding  much o f  (Payne  and  Jane  Because  transposition  reports  varies  the  major  structure  of  2 suggests the  et  what  a_l. ,  and  volcanic  of  Goat  Ridge),  of  this  Downing  thatds  plunge  competent,  of  the  was  1 980 ;  are facies  that  steeper  fold and  lies the  the  lithologic  markedly  folded.  to  a  limb  of  bedding  the  north axis  a  large  indicates of  Figure  lies  south  Cleavage-bedding  30 d e g r e e s  fine-grained  Major  than  and  in  stratigraphic  synclinal  Ridge). about  packages  foliation  southwest-dipping  cleavage  axis  (south  package  boundaries  of  to  which of  (1968)  rock  northwest-trending  intersection  north  to  west  r e l a t i v e l y undeformed  describes  m o n c l i n e on  anticlinal  Bluff  Rocks  previous  fact  the  schistosity.  zone.  separate  Pervasive of  related  zone,  12).  A monocline best Figure  in  and  suggested  in  shear  50 m t o  parallel  shear  the  McCullough  parallels  (1968) the  shear  1968)  be  generally  within  the  to  :  Empress  Fairwest.  zone  McCullough  occurred  the  nearly  not  of  (Fig. A.1)  m at  m at  segment  130  west.  argillite  boundaries  and  and  Minor tuff  package  Page  Interpretation 3.2)  as  a  Hodgson  monocline  (1967)  and  interpretations author  of  found  is  overall  similar  McCullough  of  the  the  James  to  in  the  proposals  by  Schofield  (1968),  (1 9 2 9 )  following  structure  and  evidence  map  area  and  at  odds  with  Payne  et  aJL.  (1 9 8 0 ) .  supporting  the  131  (Fig.  (1926),  This  monocline  interpretation: (1) area, for  tops  (the  the  Zone  opposite  proposed  through  tuffaceous (2) the  consistently facing  Jane  units  mantling  planar outcrops  of  northeast  of  the  pits  Britannia  (3)  large  sequence (4) ridge  is the  east  Britannia outcrop,  folded this of  observed  the  above  in  open the  Anticline  the  (the in  the  open  of  (Payne  e_t  is  the  the  the  open  Britannia of  map pits  Shear  north-dipping  an  1, acute  Glory  required  angle  Hole  for  to  Road  closure  pits), expected  map on  with  in  the  package  2 on  units  the  and  pit  bedding  1 and  argillites  Jane  in  of  the  exception  opposite  within  pits,  along  domes  cuts  repetition  syncline of  argillites  (5)  not  with  everywhere  northeast  placed  packages  anticline  scale  axis  foliation  open  southwest  rhyolitic  in  the  the  required  Basin),  north  of  is  anticlinal  the  axial  face  in  a  folded  area,  the  north-south  closure  of  an  anticline  supporting  the  presence  a l . ,  was  not  1980)  trending  of  in  the  observed  in  and the  correlation  felsic  unit  felsic  horizon  supported volcanics.  is  of  coarse  tenuous,  separation  dacitic and  into  breccias  field  similar  to  form  a  examination,  here,  but  horizons  separate  of  Page  Numerous strata  in  movement  maj o r  the of  detailed  minor  Britannia  major  conflicting,  and  faults  remain  interpretations  examination  of  faults and  examination.  D e s c r i p t i o n of  The  been  in  is  and  offset  the  beyond the  the  existance,  controversial;  have  controls  made  regarding  and  often  them.  A  requires  scope  two major  location  various,  map a r e a the  deformed  of  this  faults  marked  on  Figure  follows.  The across  Britannia the  the  to  the  western  1 at  the  east  by  the  dacitic  dome  Ridge.  Dacite  the  west  south  orebodies  a  complex  of side  of  now  lie  the  as  a  this  strong  orebodies, fault.  Lake  The  map,  the  fault  (unit  fault  by  Britannia  along  formed 1984,  fault Shear  Zone. were  near  4  unit  to  the  is the  length  Britannia  fault  of  along  i n which  at  (1948) the  of  the  This  1929;  large  Britannia  Subsidence  report).  on  from  2  localized  footwall  or  dips  package  fault  (James,  Irvine  in  and  truncated  The  a depression  authors  3.2), 8  1968).  unpublished  southeast  3 and  is  that  Ridge  forming a  Jane,  and  entire  (McCullough,  previous  the  the  unit  units  20).  fault  to  (Fig.  cuts  Ridge,  Britannia  Basin  thrust  except  9)  Ridge  separates  pluton  (unit  east-west  Britannia  Britannia  (Gibson,  1948)  all  of  Jane  interpreted  the  the  occupies the  of  strikes  s y n v o l c a n i c normal  is  of  of  edge  fault  border  slope  Mountain as  fault  southwest.  edge  eastern  interpreted  Ridge  Ridge  northern  moderately at  cut  Ridge area.  stratigraphic  3.2  faults  132  same  Irvine,  the  northern  indicated  that  hangingwall of  Page  The right  northeast-trending  lateral  orientation rhyolitic been  on  Creek  fault  small,  suggest  later  faults  right  lateral  and  outcrops  of  Jane  just  pit  (unit of  the  VOLCANIC  with  a  fault  during  also  have  the  same  been  with  open  lithology  beyond  the  a  pits  3.2)  of  the  synvolcanic  history  of  because (unit  the  Cyrtina  20).  northerly 3.2:  Several  edge  of  dykes.  fault  A  has  A - A ' ) from  observed  Figure  of  dipping  section  foliation  has  volcanic  south  Creek  to  Cyrtina  andesitic  by  similar  and  the  intruded  (Fig.  a  fault  occur  steep  has  with  orientation  the  and  western  the  faults  be  intrusion  similar  16)  may  indicated  similar  displacement  south  distribution  granodiorite  locally  argillite  foliation  6.3.1  the  Spatial the  other  (Fig.  to  times is  fault  similar  that  several  cuts  Creek,  offset  3.2.  reactivation  Furry  above  the  3.2.  HISTORY  Introduction  Geological in  Figure  remobilized Late  6.3  displacement,  domes  pile.  C y r t i n a Creek  133  the  mapping  Britannia  interpretation  -  of  volcanic flows  pile  that  i n package  Indian the  volcano-sedimentary  along  the east  River  s e c t i o n of B r i t a n n i a Ridge  pendant  paleovolcanic  allows  environment.  u n i t s w i t h i n the three changes  1, t o a  character  felsic  for a tentative  from  intrusive  Seventeen  packages  describe  predominately -  a  mafic  e x t r u s i v e dome  complex  Page  with  a  thick  pyroclastic  gradational facies  to  centre,  includes  volcanic may  area  represent  Problems  of  Figure  deposition on  on the  Fisher  source  or  many  closely  to  elongated  circular  volcanic  stratigraphic  eastern  Britannia  change  stratigraphic normal  columns  (1)  abundant rapid  nonvolcanics,  and  younger  in  units  reconstruction 3.2,  intervals within  the  into  of  rock  in  Figure  of  the  vertical on  a  magmatic  sedimentary  stratigraphic  domes  of  large by  to  felsic  extensive  least  one  (1984)  as  sources  of  within  major an  area  Figure  rock  units  and  and  units  along  are  due  record. 6.1,  and  include (2)  largely  indicated  can  be  attributed  Complexities  3.2  deposition.  vertical by  in  rapid  facies  changes,  older  6.1  units,  Massive  accumulated  is  within  episodes  Schminke,  volcanics  units  with  (3)  and  succeeding a the  area  of  intervening  sulphide  during  a  a  and  of  the  to  Fisher  Figure  eruptive  the  (c_f.  sequence. of  the  is  interfingering  grouping  to  This  of  record  Volcanic subaqueous  at  spaced  occurrence  or  a  formed  packages  unconformities,  (5)  pyroclastic  3.  Schmincke  environment.  (4)  a  vents.  environment  erosion,  based  and  Ridge  the  volcanic  volcanic  synchronous  Figure  in  near-source  near-source 1984):  of  of  represents  analysis  correlation  lateral  flanks  platform 3.2  to  represents  by  time-stratigraphic  and  3.2  the  2,  package  defined  separate  section  in  Figure  The  in  package  flows.  one  rock.  in  character  constructed  subaqueous  volcanic that  the  subaerial  stratovolcano mafic  sedimentary  indicate  possibly  blanket  134  deposits  pauses  in  Page  135  Southeast  Northwest  BRITANNIA A  VICTORIA B  CYRTINA C  WATERSHED D  1  FIGURE 6.1 C o r r e l a t i o n o f u n i t s and i n t e r p r e t a t i o n o f v o l c a n i c h i s t o r y of the east s e c t i o n of B r i t a n n i a Ridge, southwestern B r i t i s h Columbia. S t r a t i g r a p h i c columns a r e from c r o s s - s e c t i o n s i n F i g u r e 3.2.  Page  volcanic  6.3.2  activity.  Volcanic  Rocks general  in  Activity  the  map a r e a  magmatic  or  the  stratigraphic  the  eastern  of  and  Figure pauses  record  drawn  are  inactive  periods  or  units.  The  oldest  unknown of  cap  Each  the  magmatic  source.  eruptions  parallel  to  Episode over  1,000  the  one, m of  defines  by  episode  of  submarine  5,  8,  11  sequences  contains  of  three  the  of of  sequence  of  the  of  several  and of  separated 16.  intervening  fine-grained eruptive of  units  described  in  the  flows along  of  varying  and a  events 1 and  map  c o m p o s i t i o n from  episodes,  by  The  sequences  mafic  localized  lowermost  by  timing  c o m p o s i t i o n and  sequence  Shear  and  history  main episodes  units  intrusions,  a l l  five  interpretations  inferred  scale  four  thick  is  on  into  The v o l c a n i c is  argillaceous  volcanic  Britannia  the  6.1.  The  divisible  unknown.  episode  The o t h e r  are  is  are  based  Ridge  6.1.  terms  Thick  calc-alkaline felsic  felsic  Figure  sedimentary in  3.2  episodes  cycles  indicated  beds.  and  by  defined  sedimentary  Figure  Britannia  tentatively  episodes  underlie  in  in Figure  represented  eruption  of  eruptive  6.1  of  eruptive  section  episodes  episodes  136  area.  an  scales,  pyroclastics.  northwestern  are These  trend  Zone.  eruptive  m a f i c flows  event,  (units  is  2 and  represented 7),  16  and  is  by  Page  bounded  by  argillites  hyaloclastites, indicate smooth (Fig.  the  flow  surfaces  3.2)  might  a  that  and  formed  breccia  extensive  and  local  a  was  joints area  shields  or  Pillows,  submarine  represents  slope  8.  flow  on  confined  quiet  however, section B-B*  subaerial  extrusion  plateaus  front  of  characteristic  Interfingering  flow  tuff  submarine;  observed  of  and  ash  of  agglomerate  adjacent  to  the  flows.  of  mafic  eruption  of  submarine  pumice,  pillowed  and  domes  (unit  similarites  sequence  Ridge  by  Heah  Episode  by to  rhyolite  comprises: by  continued  rhyolite  flows  (unit (unit  (unit  Structural this  magmatic  7)  during 3).  6)  This  with  that  episode  after  is  and  by  fragments  or  abut  and  felsic  lithological  represents  basalt  the  indicated  felsic  overlie  evidence  southwest-dipping  and  flows  the  top  described  of  on  a  Goat  ( 1 982 ) .  two,  represented up  of  flows  ashflows  3).  suggest  thick  overlain  a  low broad  interbedded  The  unit  deposition  columnar  episode  represents  subsequent  complex  1 and  Strombolian eruption.  Extrusion  lava  of  indicate  The  Hawaiian or  unit  interfingering  environment  accumulation. flows  and  of  137  also  an  within  intrusive  package -  1 stratigraphy,  extrusive  400  m thick  that  is  dome  complex  sits  directly  (1) (2)  massive a  domes  blocky  localized  rimmed  breccia  rhyolite  by  (unit  on  (unit  along basalt  autobreccia 4)  that  is 3)  dome  Britannia flows  Ridge.  and  (unit  represents  3) the  submarine  explosive disintegration  pyroclastic submarine off  the  fans  ash  tuff  interbedded  sorted  units  eruption  -  area,  the  and  area.  ridge.  and  of  the  of  extrusive  beds  dome  and  by  breccia  zones  are  typical  of  argillite contacting Schminke, a  500  welded  of  consolidated 1984).  m thick  ashflows,  and  but  of  and  unit  wet  lithic minor  in  the  covers  bodies of  dacite,  eruptions  related  Vulcanian  and  the  the  tuff debris  900  the  ash  flows  represented Britannia  by  map  and  the  with,  glass  and by  magma  and  (including flows  m thick  entire  eruptions  pyroclastic  the  or  (Fisher  eruptions  of  poorly  caused  sedimentation  most  l a p i l l i  associated  chemical  a c t i v i t y deposited  felsic  and  8 argillites  and  spring  and  central  Terrigenous  is  to  5 marks  argillite). of  domes  bedded,  comprises  sediments  probably  tuff,  the  upwards  unit  that  fragments  crystal  waterlain  in  9)  10)  Oval  s t i l l  form  fragments  Fining  phreatomagmatic  Powerful  blanket  7.  and  episode.  intrudes  unit  (3)  hydroclastic  (unit  (unit  of  Well  composition,  unit  mafic  a  argillite  complex  9 apparently  of  and  accretionary  lithic  eruptive  dacitic  underlying rimmed  and  dome,  gradational  by  1984).  to  second  flows  flanks  4 is  138  blanket  argillite.  indicative  pyroclastic  Unit  the  Unit  vitric  Schmincke,  rhyolite  which  characterized  angular are  the  6), on  l a p i l l i s t o n e and  three,  intrusive  5 and  m thick  5)  tuffaceous  boundary  Episode  350  basalt  l a p i l l i  of  (units  (unit  (Fisher  gradation upper  to  with  accretionary  map  up  underlying  crystal and  deposits  of  Page  produced partly  and following unit  orebodies  11. at  Hot  several  horizons  Episode partially  during  four  comprises  welded  hydrothermally  rhyolite  altered  is  represented  material  in  the  the  argillite  end  An  of  and  breccia  the  southwestern  6.3.3  is  by  flows of  of  massive  package  package  2.  beds  unit  cover  the  across  volcanism in  episode  represented 17)  of  of  length  Figure  intermediate poorly  that  are  interbedded  Figure  and  the  overlie  volcanic terrigenous  Unit  16  forms  map  area  volcanism at  the  of  welded  a  that  marks  3.2.  by  corner  3 that  in  15.  of  or  Waning  fine-grained  (unit  a  m thick  increase  additional  pile  ash  300  139  volcanism.  gradual  felsic  the  pyroclastic  the  rocks  activity  thick  this  Page  documented in  the  top  andesite  unit  16  of  flows  a r g i l l i t e  in  3.2.  Sulphides  Sulphide throughout  mineralization,  the  stratigraphic  disseminations, showings  and  exhalites felsic  veins,  developed  deposited  volcanic  by  spatially  flanks,  within  domes.  The  to  beds  orebodies.  with  many  chert  6.1 ) ,  and  massive  deposits  in  sulphide  horizons  are  These  occurs  solutions  related  Sulphides,  indicated  in  felsic  domes  tuffs  significant  or  horizons  (Fig.  hydrothermal  breccias,  most  columns  breccias,  events.  related  associated  where bedded  they  Figure  accumulated  sediments  accumulations  to  occur  at  as  specific 6.1,  are  on  their  mantling the  upper  the and  Page  lower  contacts  of  package  intrusive-extrusive (unit  10),  showings lenses  of  of  the  from  linear, in  (unit  3),  now b y  within with  Hydrothermal represented  the  by  unit  three  is  and  the  packages  area  based  on  the  southwest,  to  the  a  and  boundaries  source  a  among  are  area  The the  of  series  13  blanket  along  and  at  14)  a  accumulations  rhyolite  2 and  and  stacked  Minor  extensive present  of  localized  (units  Parallel  packages changes  to  a  3.2  bedding,  character  consistent  packages  related  Figure  l i t h o l o g y and  gradational  conformable  southwest.  chemistry  locally  map  Britannia orebodies.  generally  pyroclastic  12).  (units  to  major  7), in  domes  and package  3.  alteration these  showings.  Structure  the  package  a  centers  flows  the  AND R E C O M M E N D A T I O N S  within  main  12,  and  overlying small  flows  similar  to  Developed orebodies  (unit  and  basalt  ash  alteration,  Stratigraphy  Rocks  upper  9),  represent  rock  surrounding  rhyolite  CONCLUSIONS  6.4.1  1  related  episode.  hydrothermal altered  are  (unit  eruptive  B r i t a n n i a Mine,  package  associated  These  complex  third  productive  marked  occur  6.4  the  dome  2.  140  with  forming  the  single  divided  position  consistent between  facing  units  interpretation  reflect volcanic  rock the  into  relative  a monoclinal panel  in volcanic  might  were  textures  or  might  to  across of  three  younging and  differentiation  pile,  to  gross of  Page  represent  two  Altered  distinct  and  interfingering  deformed  Britannia  Ridge  volcanics  progressively  mafic  flows  overlain  basin  and  by  associated  a  represents  upwards flows  and  sequence  the  by  500  m of  Thick less  by  over  related  to  m of  the  to  quartz-sericite  to  the  the  into  monocline  southwest,  but  is  is  unevenly  and  andesite  volcanic  across  tuff  and  that the  gradational  welded  rhyolite  argillite.  in  of  massive  MgO, d e p l e t e d The  steeply  A steeply  intrude  complex  generally  generally  and  hosts  is  schist.  that  developed dykes  unit  black  enriched  Britannia orebodies.  dacite  Volcanic  a  dome  tuff  felsic  complex  lithic  this  of  Extensive  dome  deposition  metamorphosed deformed  rocks  to  intruded  crystal  partially  400  section  mafic  This  lithic  extensive,  of  dacite  flow;  crystal  east  are  facies.  pyroclastic  overlain  foliation  The  domes  host  deformed  6.4.2  rhyolite  sequences.  southwest.  in  to  Unaltered  the  resulted  moderately  planar  to  basinal  blanketed  alteration  has  is  adjacent  western  the  succession  intrusive-extrusive  similar, tuffs  sulphides  younging  local  orebodies.  to  and  a  underlying  continuous  subaqueous  Hydrothermal  CaO,  large  are  a  a  small  with  facies  Britannia  form  rocks  volcanic  141  volcanic  dips dipping  dipping  the  fault  map  axial  area.  zones  and  cut  sequence.  Environment  transition  from  a  dominantly  mafic  to  felsic  sequence  in  Page  represents  the  pyroclastic platform.  development  rocks The  localized  development adjacent by  one  major,  an  The  the by  on  several  eastern l a p i l l i ,  of  the  pumice,  complexity,  to  a  a  shallowing to  of  several on  the  flanks  stringer  and  of  the  central the  were  during domes  bedded  (Fig.  pauses or  in  sulphides  by  between  basins of  the  in  resulted  in  the  complex,  and  was  that  followed deposited  deposition  submarine.  of  lies  just  part  vesicles,  part  (James  3.1),  deposited  major  volcanism  possibly  zone  area  A  quiet  breccia  eastern vent  map  Ben Lomond  sulphides  horizons  in  a  flows.  southwestern  material,  mafic  was  eruption  dominantly  An i n c r e a s e  a  argillite.  subaerial  part  Massive  of  to  figure.  of  explosions  transition  eastern  at  dome  This  and  is  fault,  dacite  periods  tuff  top  basalt  the  a  vent  of  in  that  volcanic  fine  pyroclastic  reflect  by  related  domes  sequence  indicate  the  rhyolite  phreatic  environment  environment — e s p e c i a l l y might  on  plateau.  minor  interbedded  possibly  part  activity,  extrusion  separated  depositional  and  of  with  Britannia Ridge  basalt  s h a l l o w i n g upward  3.2.,  final  the  the  tuff,  by  eruption  domes,  intrusive-extrusive  and  lithic  represented  a  of  basin,  crystal  is  with  felsic  hydrothermal  initial  contemporaneous eruption,  and  of  142  and  the  (1929) east  eruptions;  developed  in  Figure the  accretionary  subaerial map.  within,  to  of  stratigraphic  This  or  is  close  described of  hydrothermal  adjacent  There  Figure  3.2).  solutions  they  them.  a  at  accumulated Massive,  Britannia  orebodies  Page  are  in  altered  blanket, major  and  in  dacite  Future  and  sheared  felsic  dome  mapping  should  facies  the  B r i t a n n i a ore  mineralized be  the  crystal  o v e r l y i n g and  lithic  adjacent  to  tuff  the  the  concentrate  dome  the  complex w i t h  horizons.  horizons  on  The  a  delineation  focus  potential  overlying smaller  on of  of  extensions  of  similarly  felsic  domes  should  explored.  6.4.3  Age and  Rb-Sr 37  of  chert  breccias  of  complex.  volcanic main  equivalents  143  values  Ma f o r  dates been  the 90.5  altered _+ 3 . 2  Ma a n d  intrusion  Strata  of  package  the  top  felsic  of  form  the  pendant  strata  of  identified  the  of is  this  on  age  Coast  on  Jurassic  interpreted  Plutons  part  pers.  of  packages  overlying Britannia  River  and/or  with  the  rest  of  Fossils  recently  part  the  of  comm.,  to  (3,500  2 and  the  3  K-Ar have  Ridge, m thick).  (2,500  m  The  Britannia-Indian  discovered  might  1 67 +_  deformation.  formation.  pendant,  1987)  correlation.  of  Britannia  Mountain formation of  age  Britannia Ridge.  eastern  sediments  strata  and  Late  +_ 3 Ma a r e  the  Goat  unknown.  Indian  of  and  younger,  (D. Reddy,  problems  1,  the  a  suite  81.4  of  mafic  volcanics  relationship River  the  define  volcanic  by  thick)  some  tentatively  reset  form The  of  Correlation  within  yet  to  be  help  to  resolve  Page  Correlation  of  B r i t a n n i a group  defined  Gambier Group  age  the  for  m of  Britannia 500  difficult.  B r i t a n n i a Ridge  mid-Cretaceous 6,000  is  dates  published  m thick,  can  which  not  be  for  include  of  Lithological  similarities exist  stratigraphy  and  described  Arthur  grouping  for  Columbia  perhaps  6.4.4  The rocks  is  environment  environment  to  the  volcanic  Package  1,  the  Goat  and  3,  the  are  described  and  of  a r g i l l i t e  correlated  to  the  the  the  west  side  of  a  (Fig.  of  more  over  1,750  Britannia  southwestern  Britannia in  the  of  m 1.1).  group Harrison  Lake  rigorous  coastal  British  dome  transitional  Mountain formation,  Japan  felsic  for  environment  arc  (Easton,  complexes  the  Britannia  from  an  group  extensional  arc.  formation.  Supergroup  deposition  possibly  tectonic  Yellowknife lava  the  indicated.  arc,  belt  within  Over .  units  between  in  Jurassic  than  Brunswick Mountain  along  loosely  strata.  sediments  Introduction  strata  island  volcanic  an  (1986).  Late  older Group  the  Environment  tectonic  is  stratigraphy  Mesozoic  Tectonic  Group on  is  Gambier and  with  possible  several  confidently  type-section  by  Gambier  The  stratigraphy  calc-alkaline volcanics pendant,  stratigraphy  144  and  may  separate  represent from  Similar,  related  (Miyashiro,  1974)  1986). subaerial  Mafic  a  packages  volcanic and  flows  within with  pyroclastics  of  2  belts the  minor package  1  Page  are  chacteristically  erupted within  from a  a  back.  Intrusive flow  sheets  fissure  -  extrusive  in  ash  tuffs  flow  environment  Rocks  -  2 and  types  However,  also  be  and  eastern  Indian  River  with  widespread  calc-alkaline  of  volcanic  -like with be  felsic and  several  controlled  Zone",  can  be  northwesterly Plutonic several  (1)  the  trend  volcanic  basin  may  margin  have or  belts.  and  abundant  island to  of  indicative  welded  within  the  Britannia  arc  felsic  the  and  of  pyroclastic non-welded  back-arc  volcanic  within  Gambier this  the Group  rocks,  zones,  linear  the  Fisher  cycles,  voluminous,  and  whose  pendant. pendants  and  (2)  (4)  accumulation parallel  A volcanic  called  arc-like,  (cf.  subaqueous  belts.  vent  and  following  including  volcanic  Ridge  regions  predominately  central  reflects  characteristically  calderas sheets  ash  1986).  prominent  of  subaqueous  be  sedimentary  linear  to  may  volcanism,  identified  Complex  volcano  volcanics  share  associated of  more  pendant  (3)  identified by  -  subaerial  of  mafic  rocks,  arrangement  rift  section  modern  1984):  and  emplaced  Cas,  Schmincke,  explosive  of  pile.  the  a  3 are  developed  may  characteristics  domes  well  (Wright  in  Britannia  These  the  along  A shield  basin.  packages  with  material  system  arc  of  arcs  tholeiitic.  -  calc-alkaline. island  arc  145  the The in  parallel  arc  province  emplacement "Britannia  may Shear  strong the  Coast  arrangement  of  Page  Notable massive  similarities exist  sulphides  Britannia  -  identified  Indian  River  Archean greenstone  deposits  accumulated  marginal  1983). bottom to  Thick by  dacitic  basaltic  descriptions  of  of  fragmental  pillow rocks types  lavas  depressions felsic  and  deposit  mineral  province  within  Gambier  Group  southwestern  of  tuffs  sequences, mafic  the  Jurassic  Cretaceous  coastal  belts  (Ohmoto  rocks  also  a  Skinner, top  and  similar of  very  mapped  Columbia.  the  following  the  nature  for  and  sulphide  and  on  are  The  potential  British  the  calderas  flows,  belts.  of  massive  Kuroko  bounded  emphasizes -  of  volcanogenic  Specifically,  i n greenstone  similar  in  -  volumes  the  rocks  Canadian deposits.  large  volcanic  lenses  and  Miocene Kuroko  of  numerous  pendant,  Japanese  in  the  felsic  deposits  eruption  the  in  sulphide  the  of  between  146  these large  as  Page  7.  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SAMPLES  from  and  outcrop  Initial (Fig.  3.2)  were  rock  types  within  exploration  for  Sampling  1982  the  Britannia  section  pits for  in  the  whole  Trace as  Trace  element and  pits  (1)  samples  d r i l l  aid  the  most  Basin.  a  similar along  Furry  open  massive  not  complete  data  the  samples  each  and  to  for  within  12  used  in  set  this  Creek v a l l e y .  were  analysed  Ba.  Thresholds  rock  type  from  the  for  and  aid  orebodies. crosscutting  and in  along  one  1983  Britannia  open  analysed  elements  commonly  deposits.  study  are to  included  Figure A . 1 .  metals  from  Three  Cu, Mo, Pb,  for  (2)  were  supplemental  mineralized horizons  Figure  grouping of  the  trace  of  map  samples  sulphide  in  sections  emphasizing ore-related  Furry  area  chemical  the  Sampling  chip  for  Britannia  four  pits.  rock  and  analyses  correlate  the  Creek v a l l e y ,  units  Selected  elements  analyses  over  stratigraphy,  volcanogenic massive  of  taken  definition  concentrated in  core  were  lithogeochemical study  sulphides  Zone  major  across  for  a  the  A s , A u , Hg a n d  estimated  of  Britannia  element  forty-five Fe,  of  and  the  Jane  part  identify open  on  rock  components  here  Shear  chip  p o o r l y known  massive  through  concentrated  to:  the  was  rock  faces  objectives  area  in  ten  the  were  made  to  Britannia  hundred  and  Zn, Ag, N i , Co,  these  elements,  were  cumulative  frequency  plots,  are  Page  in  Appendix  elements  C (Table  useful  for  "Britannia-type" considered  C.1).  An a t t e m p t  assessment  sulphides  premature  and  in  of  to  the  the  potential  Furry  abandoned  identify  due  pathfinder for  Creek v a l l e y to  lack  164  of  was  stratigraphic  control.  Rock  chip  description 2)  sample  includes  descriptions  major  element  of  locations, four  the  analyses.  descriptions  cards:  samples  3)  the  pyroclastic units  listing  the  samples  is  an  index  for  the  trace  follows  computer  are  in  i n Tables files.  chemical  identification  T e r m i n o l o g y and  describing of  1)  and  element  and  Figure  location,  analyses  nomenclature  sample  and  used  4)  in  A . 2 . A complete  A . 4 and  A.5.  Table  A.1  PUMICE. GLASS  GRANULOMETt-.C CLASSIFICATION Of PYUOCI ASTS AND OF UNIM0DAL. WELL-SORTED PYROCLASTIC DWSITS Nomenclature and stratification thickness (Ingram. 1954)  Pyroclast  Thickness  Name Very thickly bedded Thickly bedded Medium bedded Thinly hedded Very thinly hedded Thickly laminated Thinly laminated  Clast size  >  1 m 100 cm 10 V) cm 3-10 cm 1 1 cm 0 3 1 cm <03 cm  Bomb, block  W  Pyroclastic deposit' Mainly unconsolidated: tephra  Mainly consol pyroclastic  Agglomerate, bed of blocks or bomb, block tephra  Agglomerate, pyroclasttc  64 am Layer, bed of l a p i l l i or U p i l l l tephra  Lapilli tuff  Coarse ash grain  Coarse ash  Coarse (ash)  Fine asn grain (dust grain)  Fine ash (dust)  Fine (ash) (dust tuff)  Lapi 11 LIS  Z  <m  1/16 ™  Page TABLE A . 1 .  Index f o r l i s t i n g s of rock chip sampLes and A.S> from the B r i t a n n i a Ridge a r e a , Columbia.  COLUMN  ITEM  ( T a b l e s A.4 southwestern  British  DEFINITION  1. Card Number 1 - I d e n t i f i c a t i o n and L o c a t i o n c a r d number 3 -1 0 f i e l d number a n a l y t i c a l number 1 2-15 1 7 sample type R-rock, D - d r i l l c o r e , P-puip 1 9- 2 5 northing 27 - 3 2 easting 34 - 4 0 d r i l l h o l e number a r e a - L e v e l - h o l e number 42 - 4 8 d r i l l h o l e f o o t a g e (from) 49 - 5 4 ' " " (to) 56 - 5 9 e l e v a t i o n (meters) 61 -71 a n a l y s e s done T E - t r a c e eLement, ME-major element RE- r a r e e a r t h , TS- t h i n s e c t i o n c u t RS- Rb-Sr d a t i n g KA- K-Ar d a t i n g 73 - a o repeat sample numbers Card  dumber 2 - Rock D e s c r i p t i o n s c a r d number f i e l d number 3 -10 a n a l y t i c a l number 1 2- 1 5 1 7-20 rock type (CODES IN TABLE A.2) 22 - 2 6 map u n i t ( p r i v a t e c o . r e p o r t , K.M.McCol1,1983) I r v i n e and Barager C l a s s i f i c a t i o n 23 - 3 5 rock name, AFM, A l v s . P l a g i o c l a s e 37 - 4 2 colour - fresh (CODES IN TABLE A.3) colour - weathered (CODES IN TABLE A.3) 44 - 4 5 47 - 4 8 texture 0 -massive, 1 - p o r p h y r i t i c , 2 - a m y g d a l o i d a l , 3-pyroclastic, 4-agglomeratic, 5-breccia 6 - sedimentary g r a i n size - matrix 1-aphanitic, 2-fine grained 50 3-medium g r a i n e d , 4 - c o a r s e g r a i n e d c L a s t s or p h e n o c r y s t s 52 -61 abundance Q-none, 1- <3%, 2- 3-20%, 3- >2Q% 52 size 0- <1/16, 1- < • 2mm , 2 - 2 -62mm, 3- > 62mm 54 - 5 6 0 - f i n e ash, 1-coarse ash, 2 - L a p i l l i , 3-block 56 -61 foliation Q-none, 1-bedding, 2-igneous l a m i n a t i o n 63 3-"GMS", 4 - s c h i s t o s i t y , 5 - a l l i g n e d fragments schistosity intensity 0-none, 1 - f a i n t , 2-moderate 65 3-heavy, 4 - e x t e n s i v e , 5-extremely f i s s i l e 67 competence 0-good, i - f a i r , 2-pooc, 3-very poor 69-73 alteration 69 degree 0-none, ' - s l i g h t , 2 - moderate, 3-extreme 71-73 composition 0-fresh, 1 - s i l i c a , 2-epidote, 3 - c h l o r i t e , 4 - s e n c i t e , 5 - a n h y d r i t e , 6 - b i o t i t e , 7-CaC03, 8-hornblende 75 veins 0-none, 1-quartz, 2 - q u a r t z , p y r I t e , 3 - a n h y d n t e 4-epidote, 5 - e h l o n t e , 6-ankerite 77-80 sulphides 77 d i s t r i b u t i o n 0-none, i - m a s s i v e , 2-aggregate, 3-disseminated, 4 - l a y e r s , 5 - v e i n , 6-vein and d i s s e m i n a t e d 79-80 primary s u l p h i d e 1 - p y r i t e , 2 - c h a l c o p y r i t e , 3-arsenop y r i t e , 4 - s p h a l e r i t e , 5-galena 3. Card Numoer 3 - Trace Element 3122530354045505560657075804.  1 1 0 1 5 29 34 39 44 49 54 59 64 69 74 79 84  Card 1 3-10 12-15 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74  Analyses  c a r d number field number analytical n ppm Cu ppm MO ppm Pb ppm Zn ppm Ay Ml PPm ppm Co Fe % AS PPm Au ppb ( A He, ppb ppm Ba  Number 4 - M a ) o r E l e m e n t c a r d numoer field number analytical number 5i02 % A1203 » Fe2G 3 * T102 » MgO »  CaO Na20 K20 P205 L.O.I.  .».=.»*  =  =  t  » % * »  . . = = = = = = = = = = . = = 3 « =  AnaLyses  166  TABLE  A.2.  Codes  for  rock  types  (S) Quartz-sericite Chlorite schist "GMS" Sulphide schist  Dacite DCIT DCFL DBTF DCLP DCTF DFTF DBLT DCLT  (D) Dacite Dacite  Massive MVSP  schist  flow block tuff l a p i l l i tuff coarse ash tuff f i n e ash tuff block l a p i l l i tuff ash l a p i l l i tuff  Rhyolite (R) RYLT Rhyolite RYBX Rhyolite Sulphide  breccia  Tables  A.4  and  A.5.  Intrusive DCIV Intrusive Dacite DKFE F e l s i c dyke DKME Mafic dyke  Plutonic (P) PGDR Granodiorite PQZD Quartz Diorite  Schist SQZS SCCL SPSC SPSS  in  Sedimentary (M) MARG Argillite MCHT Chert MTFF Tuffaceous  A n d e s i t e (A) AGLM Agglomerate ABLT Andesite Block L a p i l l i Tuff Block Tuff ABTF Lapilli Tuff ANLT coarse ash tuff ACTF f i n e ash tuff AFTF  Basalt BSLT BPLV Vein VEIN  (B) Basalt Basalt pillow  lava  TABLE  A.3.  Colour  Codes for c o l o u r of rock samples l i s t e d i n T a b l e s A . 4 and A . 5 . C o l o u r codes a r e based on the M u n s e l l c o l o u r c h a r t ; 1 i s t h e d a r k e s t a n d 10 i s t h e lightest.  Listing  Munsell  Chart  Colour  Listing  Munsell  Chart  FRESH COLOURS! Brown  Yellow Olive Silver  Black Grey  WEATHERED  BR 3 BR2 BR1 YW2 YW1 OL1 SL3 SL2 SL1 BK1 GY6 GY5 GY4 GY3 GY2 GY1  YR YR YR Y Y Y Y Y Y Y N N  7/2 6/2 5/2 7/4 6/6 5/3 9/1 7/2 6/2 2/1 5/1 6/1  N  4/1  5 Y  5/1  5 5 5 10 5 10 10 10 10 5  Green  GR3 GR2 GR1 G r e e n - G r e y GG5 GG4 GG3 GG2 GG1 D a r k G r e e n DG4 DG3 DG2 DG1 Blue BL4 BL3 BL2 BL1  5 5 10 5 5 5 5 5 10 10 5 10 5 5 5 5  G G GY GY GY GY GY GY GY GY GY GY B B B B  8/1 7/1 5/2 10/2 9/2 8/2 6/2 5/2 3/1 3/2 2/1 3/1 7/1 5/1 6/1 6/2  COLOURS:  0-white, 1-light 6-grey, 7 - s i l v e r  green, 2-buff, 3-rusty, grey, 8-yellow  4-green,  5-dark  green  Page  TABLE  A.4.  169  L i s t i n g o f 1982 r o c k c h i p s a m p l e s ( i n c l u d i n g l o c a t i o n d e s c r i p t i o n s and c h e m i c a l a n a l y s e s ) . Format for these l i s t i n g s are i n Table A . 1 . D e t a i l e d codes for s p e c i f i c f i e l d s are i n T a b l e s A . 2 and A . 3 .  Listing 1 2 3 4 5 6 7  a  9 10 1 1 12 13 14 15  16  17 18 19 20 2 1 22 23 24 25 26 27 28 29 30 3 1 32 33 34 35 36 37 38 39 40 4 t 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58  o f GOOD a t 13 4 7 : 2 6 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 I 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 I 2  MC82 - 134 6 0 0 1 MC82 - 134 6 0 0 1 MC82 - 134 6 0 0 1 MC82 - 134 6 O 0 I HC8 2 - 133 6 0 0 2 MC8 2 133 6 0 0 2 MC82 - 133 6 0 0 2 MC82 - 133 6 O 0 2 MC8 2 - 132 6 0 0 3 MC8 2 - 132 6 0 0 3 MC8 2 - 132 6 O 0 3 MC8 2 - 1 32 6 0 0 3 ML 6 2 -13 1 6O04 MC8 2 -13 1 6 0 0 4 MC82 - 131 6 0 0 4 MC8 2 - 131 6 0 0 4 MC8 2 - 130 6 0 0 5 ML 8 2 - 130 6 0 0 5 MC8 2 - 130 6 0 0 5 MC82 130 6 0 0 5 MC82 129 6 0 0 6 MC82 - 129 6 O 0 6 MC82 - 129 6 0 0 6 MCB2 - 1 29 6 O 0 6 MC82 -128 60O7 MC8 2 - 128 6 0 0 7 MC 8 2 128 6 0 0 7 MC8 2 - 128 6 0 0 7 MC82 127 6 0 0 8 MC8 2 127 6 0 0 8 MC8 2 127 6 0 O S MC82 - 127 6 0 0 * ML 8 2 126 6 0 0 9 MC82 126 6 0 0 9 MC82 - 126 6 0 0 9 MC82 - 126 6 0 0 9 MC82 - 125 6 0 1 0 ML 8 2 - 125 6 0 1 0 MC82 - 125 6 0 1 0 MC82 - 125 6 0 1 0 MC82 -008 601 1 MC82 -008 6 0 1 1 MC82 -OOB 601 1 MC82 -O08 601 1 MC82 - 137 6 0 1 2 MC82 - 137 6 0 1 2 MC82 - 137 6 0 1 2 MC82 - 137 6 0 1 2 MC82 138 6 0 1 3 MC82 - 138 6 0 1 3 MC82 - 138 6 0 1 3 MC82 - 138 6 0 1 3 MC82 - 1 3 9 6 0 1 4 MC82 - 139 6 0 1 4 MC82 139 6 0 1 4 MCB2 - 139 6 0 1 4 MC82 - 105 6 0 1 5 MC82 - 105 6 0 1 5  o n NOV  7.  1984 f o r CCId=KMMC  R 5493595 493748 MCHT 5C 6 R 5493657 493650 MCHT 5C 20 69 33 R 5493657 493642 MCHI 5C  a R 5 4 9 3 6 7 0 493621 ACTF 20 15  Page 1156 TE  GY2VWI 3 1 19  7 2  0 78  0G1 1  TS 0 2 62  4 2 3 64  1 1 1  1 5  4 2 2 102  1110 TE 12 1 0 0 10  1 2 15  10 08  50 3 15  660  1  1 4 23  7  10  140  160  1 5 3 6  1 4 24  5  10  40  740  1 5  1 3 65  4  10  30  5 10  134 O 0 10  4 45  4  IO  2 30  50O  1 I 7  1 6 3 17  1 6 00  5  10  90  900  1 1 0 2 8  13 O 4 14  1 92  3  IO  60  680  1 0 3 7  1 3 98  4  10  40  1250  1 O 3 1 1  1 4 62  2  10  40  260  3 3 5  1 4 7 1  2  10  30  260  12  20  30  390  3  10  40  840  4 2 3 83  1107 TE 12 1 0 0 0 2 1 10  R 5493696 493568 MCHT 5C 76  GY 3 1  12 1  4 2 3 101  1103 TE 32 9 2 7 6 0 10  1 1 1 15  3 6  3 4  I09S TE BK 1 9  16 1  7 2 0 150  1 2 IO 1080 TE  GY20G2 5  13 6  7 2 O 106  10  1  1067 TE GY 2 2  0G2 1  13 1  3 1  7 2 0 109  4  1 1 0  2 2  20  1050 TE 1 3 23 5 0 0 0 3 1 1 1 4 10 1045 TE  R 5493722 493381 MIFF 5T 40  2  R 5493705 493360 MCHT 5C 4800  10  R 5493690 493343 MCHT 5C 27  3  R 5493509 493070 DCLP 3C  1400  620  1  R 5493745 493435 DCLT 30C 103  7 2 1  40  50  GY 3 1  R 5493735 493475 MCHT 5C 20  1 3 3  3  10  10  R 5493687 493586 MCHT 5C 16  R 5 4 9 3 7 2 5 493515 MCHT 5C 57  14  1 3 52 46  9  4  1  R 5493708 493560 MCHT 5C 92  1 0 3 10 37  1 2 .88  1 32  GY 3 1 1  1  2 2  1116 TE 2 1 0 2 10  TS 0 2 3  R 5493680 49360O MCHT 5C 18  3  15 0  2 3 35  1 47 6  13 1  1 1 1 3 2  1131 TE ME 2 1 0 10 63 3 :20 1130 TE ME 23 14 0 2 10  7 2 0 GY4BR1 3 1 1 16 22 13 5 2 4 83 GV 6 1  20  3 17 2 0  0G2 1  GY5  98  23 1  14  63 3  17  1 1 140  10  1030 TE 2 1 0 1 1 1 22 4 . 80 1023 TE  GY2  0G1GR2  12  1 0 1 19  4 3 3  1 0 0 1 1  20  TS 1 0 0 1 1  0 9 6 0 TE 23 1256 3  14  3 6 3 33  1  16 2 6 6  1  1 0 2 437 0  0  6 63  1 74  ID  o  Listing  o f GOOD a t  59 60 6 1 62 63 64 65 66 67 6B 69 70 7 1 72 73 7J 75 76 77 78 79 80 8 1 82 83 84 85  3 4 t 2 3 4 1 2 3 4 1 2 3 4  87 88 89 90 9 1 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 1 10 1 1 1 1 12 1 13 1 14 1 15 1 16  3 4  86  1 2 3 4 1 2 3 4  1  2 3 4  1  2  1  2 3 •1  1  2 3 4  1 2 3 4 1 2 3 4 1 2 3 4  1  2 3 4 1 2 3 4  13 4 7 : 2 6  MC82 - 105 6 0 1 5 MC82 - 105 6 0 1 5 MCB2 - 104 6 0 1 6 MC8 2 - 104 6 0 1 6 Mi 82 - 104 6 0 1 6 MC82 104 6 0 1 6 MC82 - 103 6 0 1 7 MC82 103 6 0 1 7 MCB2 - 103 6 0 1 7 MCB2 - 103 6 0 1 7 MC82 - 102 6 0 1 8 MCB2 - 102 6 0 1 8 MC8 2 - 102 6 0 1 8 MC82 - 102 6 0 1 8 MC82 - 101 6 0 1 9 MCB2 - 101 6 0 1 9 MC82 - 101 6 0 1 9 MCB2 - 101 6 0 1 9 MC82 - 100 6 0 2 0 MC8 2 - 100 6 0 2 0 MC82 - 100 6 0 2 0 MC8 2 - 100 6 0 2 0 MC8 2 -099 6 0 2 1 602 1 MC8 -099 MC82 -099 6 0 2 1 MC82 - 0 9 9 6 0 2 1 MCB2 -098 6 0 2 2 MC8 2 -098 6 0 2 2 -098 6 0 2 2 MC 8 MC82 0 9 8 6 0 2 2 MC8 2 0 9 7 6 0 2 3 MC8 2 0 9 7 6 0 2 3 MC8 2 0 9 7 6 0 2 3 MC82 -097 6 0 2 3 MC8 2 -096 6 0 2 4 MC82 0 9 6 6 0 2 4 MC82 -U96 6 0 2 4 MCB -096 6 0 2 4 MC82 -095 6 0 2 5 MCB2 -095 6 0 2 5 MCB2 -095 6 0 2 5 ML 82 - 0 9 5 6 0 2 5 MC82 -094 6 0 2 6 MC82 -094 6 0 2 6 MC82 -094 6 0 2 6 MCB 2 - 0 9 4 6 0 2 6 MC82 - 0 9 3 6 0 2 7 MC82 -093 6 0 2 7 MC82 - 0 9 3 6 0 2 7 MC82 -093 6 0 2 7 MC82 0 9 2 6 0 2 8 MC82 -092 6 0 2 B MC82 -092 6 0 2 8 MCB2 -092 6 0 2 8 MC82 0 9 1 6 0 2 9 MCB 2 0 9 1 6 0 2 9 MC8 2 -09 1 6 0 2 9 MCB 2 -09 1 6 0 2 9  2  2  2  o n NOV  7.  1984 f o r CCId=KMMC  67 R 5493505 493055 ACTF 20 36  1  34  96  1 74  GR 1 2  Page  1  1  10  1 1 68  14 0  134 0  3  23 7  4 2 2 65  0 9 5 3 TE 2 1 3 3 0 2 . 10 1  R 5493475 493014 S02S 8 10  GRIG<5 1  10 1  4 3 2 59  0 9 4 5 TE 2 1 3 3 2 2 10 9  134 0  R 5493454 492999 ABLT 2BC 46  DG1GR1 3 7 10  4 2 3 100  0 9 3 7 TE 32 1246 0 2 0 2 . 10 9  34 0  R 5493435 492989 AGLM 2A AN CA CA DG2 14 1 62 79 14 24 R 5493425 492985 ACIF 20 AN GR 1 6 2 R 5 4 9 3 4 18 4 9 2 9 6 6 DCTF 3D 9 R 5493402 492958 ACL T 2C0 46  GR1GV 1  1  R 5493395 492948 AC L T 2CD  6  6  GG1BL3  1  16  4 2 2 1 18  4 2 3 270  3  4 2 3 143  0 9 15 TE 23 126 0 10  R 5493388 492943 ACTF 20 3 4 AN CA CA GY 1 16 6 2 57 33 B 93 15 12 R 549333B 492945 GWAV 7 AN CA CA DG2GG5 3 4 6 22 2 66 OI 6 90 12 39 R 5493377 492933 AFTF 2E BA 1 43 CA GR 1 4 1 1 48 0 5 17 51 10 5 0 R 5493363 492920 ACTF 2D 4 GR 1 3 90 14 2 R 5493348 492912 ABLT 2BC 25  DG1GY5 2  3 5  440  3 20  22  10  60  5 30  1  1 97  4  10  30  640  0 1  1 92  7  10  30  660  3 2 1 3 27  3  10  20  1 140  10 29  40 2 64  630  0  0  9  4 4 3 1 16  3 48  1 3  10  30  270  1 4 64  6  lO  40  7B0  1 3 18  1 6 59  4  io  30  1640  13 10  1 4 26  5  10  50  320  1 5 00 1 1  4 92  10 26  40 4 90  300  34 0 3 9 60  1 4 20 1 83  9 1 10  10 12  20 4 03  2 70  1 2 237 6 0 IS 8 13 49  2 90 2 06  2 65  10 24  10 1 4 1  20O  3 63  10  10  10  980  1 4 30  7  10  30  7 50  1  1  1 0  0 9 1 3 TE ME 2 126 0 1 . 10 1 2 1 6 .0 9 0 9 0 5 TE ME 2 3 32 1 3 3 130 10 .67 5 51 0 9 0 8 TE ME 3 3 32 15 1 1 45 10 90 5 81 0 8 9 7 TE 2 3 2 716 0 1 131 10 2 3 155  1 4 88 3 65  3 88  0 9 2 7 TE 2 8 0 0 0 3 . 20  13 1  1  50  3 2 185  0 9 2 0 TE 23 7 196 0 2 . 10  GY 1 2  10  0 9 3 3 TE ME TS 24 58 0 0 0 1 32 0 3 1 1 1 10 1 08 3 72 2 04 0 9 3 0 TE ME TS 4 3 3 2 17 O 0 0 i0 O 0 3 1 4 105 . 20  3 26 6 7 55 2 1  2  8  R 5493495 493033 S02S B 8  DG1GG1  1 96  5  0 9 6 0 TE 2 1 1 2 2 2 47 10  1  3 0 3 10  1  1  43  3  1 TS 0 1 1  1 3 1 1  34  3  1 04 1 2 9  0 1 235 19  0 8 9 0 TE 34 9 5 2 6 0 0 0 1 10 6  6 7  23 0 6 6  PJ  LQ  List*ng 1 17 1 18 1 19 120 12 1 122 123 124 125 126 127 128 129 1 30 1 3 1 132 133 134 135 136 137 138  139 140 14 1 142  143  144 145 146 147 148 149 150 15 1 152 153 154  155 156 157 158 159 160 16 1 162 163 164 165 166 167 168 169 170 17 1 172 173 174  of  GOOD a t 1 3 4 7 : 2 6 1 2 3 4 1 2 3 4  1  2  3 4 1 2  3  4 1 2 3  4 1 2 3 4 1 2 3 4  1 2  3 4 1 2  3 4 1 2 3 4  1 2  3  4 1 2 3 4 1 2 3 4 1 2 3 4 1 2  MC82 -0B9 MC8 2 - 0 8 9 MC82 - 0 8 9 MC82 - 0 8 9 MCB 2 - 0 8 8 MC82 - 0 8 8 MC82 -088 MC82 -088 MC82 0 9 0 MC82 -O90 MC82 0 9 0 MC8 2 0 9 0 MC82 -087 MCB 2 0B7 MCB 2 0 8 7 MC8 2 0 8 7 MCB 2 -086 MC82 0 8 6 MC82 OB6 MCB 2 0 8 6 MC82 0 8 5 MC82 0 8 5 MC82 - 0 8 5 MC82 -0B5 MC82 -08 4 MCB 2 0 8 4 08 4 MC8 -OB4 MCB MC82 0 8 3 M( 8 2 - 0 8 3 083 MCB MC8 2 0 8 3 MCB 2 -082 MC8 2 -08 2 MCB 2 -082 MC82 0 8 2 MC82 0 8 1 MCB 2 -OB 1 MC8 2 0 8 1 MCB2 -08 1 MC8 2 0 8 0 MC82 - 0 8 0 080 MCB MCB 2 - 0 8 0 MC82 0 7 9 MC82 - 0 7 9 MCB 2 -079 MC82 - 0 7 9 MC 82 -07 8 MCB 2 -078 MC82 -078 MCB 2 0 7 8 MC82 -077 MCB 2 -077 MC82 -077 MC82 -077 MC8 2 0 7 6 MC 8 2 -076  2 2  2  2  6030 6030 6030 6030 6031 603 1 603 1 6031 6032 6032 6032 6032 6033 603 3 6033 6033 6034 6034 6034 6034 6035 6035 6035 6035 6036 6036 6036 6036 6037 6037 6037 6037 6038 6038 6038 6038 6039 6039 6039 6039 6040 6040 6040 6O40 604 1 604 1 604 1 604 1 604 2 6042 604 2 604 2 604 3 604 3 6043 604 3 6044 6044  o n NOV  7.  1984 f o r CCId=KMMC  R 5493340 492880 ACTF 2D 185  DG 1  3  6  2  Page  3  4 2 3 185  0 8 8 5 TE 12 12 0 1 1 1 24  32  4 2 0 189  0 8 8 5 TE 1 0 1 0 1 1 20  1  to  4 3 19  1 5 85  3  to  30  20O0  1 3 3  1 3 50  6  to  30  4200  4 3 1 1  1 6 00  6  10  40  2600  1 3 8  1 4 OO  5  IO  20  1 160  1 65  5  10  30  1700  1 75  3  10  SO  820  2 04  4  10  30  800  R 5493340 492880 OCT F 3D 69  2  R 5493335 492910 ACTF 2D 153  13 5  4 2 3 198  0 8 8 3 TE 2 7 126 0 0 0 1 10 10  23  3  R 5493329 492897 ACTF 2D 8  DG4 1  13 5  4 2 2 126  0 8 8 0 TE 2 1 3 2 0 1 1  14  R 5493320 492892 ANLP 2C 3  DG1GV5 1  34 2  4 2 3 65  0 8 7 3 TE 32 12 5 2 10  1 2 1  43 0 3 2  1  3 1  4 2 3 74  0 8 7 0 TE 32 12 5 2 10  1 2 1  34  0 3 5  t  13  1  0 8 7 0 TE 4 2 3 32 1 5 3 2 2 1 1 16 10  16 0 3 4  I  13 1  0 8 6 8 TE 4 2 3 32 6149 3 3 104 10  36 425  0 8 6 7 TE 2 1 0 2 80  R 5493312 492882 GWAV 7 4 R 5493309 492881 OCLT 3CD 3 R 5493307 DCLP 3C  GV 1  3 22  GGIGV1  0G4SL3 2  GR 1 2  492879 2  R 5493305 492875 DCTF 3D 3  DG4 1  GR3 2  R 5493303 492866 ACTF 2D 55  1  R 5493295 492865 ANLP 2C 14  5  DG 1  1 3  0G1  1 2  R 5493295 492865 ACTF 2D AN CA CA DG 1 94 3 16 79 5 5 75 R 5493294 492865 DCTF 3D DG2GG3 5 2 R 5493287 492850 ACTF 2D 3 1 R 5493280 492846 DCLP 3C  0G1 16  13 lOO  0G1SL2  4 2 2 178  4 2 3 175  3  1 2  1  1 1 1  134  14  0 8 6 0 TE 12 6 8 4 0 2 0 2 237 49 10 0 8 6 0 TE 12 12 3 3 2 2 30 5  4 2 3 132  0 3 2  1 1 79  3  10  20  690  1 3 3  1 2 32  4  10  40  1 160  0 3 26  1 5  4  IO  30  920  4  10  20  3800  3 96  to  40 3 96  820  3  10  20  260  10  160  1060  43 0  3 8  4 2 3 76  4 2 3 570  0 8 5 0 TE 32 986 0 3 2 2 33  23 0 3 12  1  4 2 3  0 8 4 6 TE 32 1 0 3 2 2  13 0 3  1  1  to  32  0 3 17  1 81 34  0 3 3  95  1 3 26  0 8 5 5 TE ME 12 6 8 1 9 0 2 0 1 20 29 13 6 49 0 8 5 5 TE 12 12 3 3 2 2 10 1  1 4 2 3 1 195 7 55 3 1 1  io  1 6 3 62  to  1 2  6  11  10  15  28  (D  ro  Listing 175 176 177 178 179 180 18 1 182 183 184 185 186 18? 188 189 190 19 1 192 193 194 195 196 197 198 199 20O 20 1 202 203 204 205 206 207 208 209 2 10 2 1 1 2 12 2 13 2 14 2 15 2 16 2 17 2 IB 2 19 220 22 1 222 223 224 225 226 227 228 229 2 30 23 1 232  o f GOOD a t 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 t 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  13.47:26  MC82 0 7 6 MC82 - 0 7 6 MC82 0 7 5 MC82 - 0 7 5 MC82 - 0 7 5 MC82 - 0 7 5 MC82 -07 4 MC82 -074 MC82 -074 MC8 2 -074 MC82 - 0 7 3 MCB2 0 7 3 ML'8 2 0 7 3 MC8 2 - 0 7 3 MC8 2 -072 MC8 2 -072 MC82 -072 MC82 -072 MCB2 0 6 0 MC82 0 6 0 MC82 0 6 0 MCB2 0 6 0 MCB2 07 1 MC8 2 0 7 1 ML 8 2 -07 1 ML 8 2 -07 1 ML 8 2 0 7 O MC8 2 0 7 0 ML82 - 0 7 0 MC82 0 7 0 ML82 -059 MC8 2 0 5 9 MC82 -059 MLB 2 0 5 9 MC82 0 5 8 ML 8 2 0 5 B ML 8 2 0 5 8 MCB2 0 5 8 MC82 0 5 7 MC82 0 5 7 MC8 2 0 5 7 MC8 2 -057 Ml 82 0 6 9 MC82 -069 MC 82 0 6 9 MC82 -069 MC82 -06B MC82 0 6 8 MC82 -068 ML 8 2 -068 MC82 -056 MC62 0 6 6 MC82 0 5 6 ML 8 2 0 5 6 MC8 2 0 6 7 MC82 0 6 7 MC8 2 0 6 7 MC82 0 6 7  604 4 6044 6045 6045 604 5 6045 6046 6046 6046 6046 604 7 604 7 604 7 604 7 604 8 6048 604B 6048 6049 6049 6049 6049 6050 605O 6050 6050 605 1 605 1 605 1 605 1 6052 6052 6052 b052 6053 6053 6053 6053 6054 6054 6054 6054 6055 6055 6055 6055 6056 6056 6056 6056 6057 6057 6057 6057 6058 6058 6058 6058  o n NOV  7.  19B4 f o r CCId=KMMC 4  4  S3  R 5493268 492845 ACTF 20 172  1  R 5493265 492B44 S02S 8 6  0  0  R 5493265 492B33 DC TF 3D 4  GR 1 1  3 1  R 5493250 492818 SOZS 8 5  R 5493198 492798 MIFF 51 25 R 5493195 492798 ACIF 20 39  3  3  GR2 13  4 2 3 260  3  GR2 4  GV 1 2  GV 1BR3 2  BL2 1 1 1 32  TH  12 1  3 13  3  30  4B0  1 6 63  6  IO  30  260  1 83  5  IO  20  440  1  4 2 3 67  0 8 3 7 TE 12 1 7 O 2 0 1 1 10  4 O 3 3  1 I 76  5  10  30  440  0 7 1  0 8 2 9 TE 1 0 3 2 1 3 20  1 0  1 2 90  5  IO  30  240  4 2 3 75  0 8 10 TE 2 259 0 3 2 2 10 2  43 0  1 1  10  30  480  0 8 1 0 TE 1 14 0 1 0 1 10 30  13 0 40  5  10  40  480  16 0 3 14  1 5 05  15  IO  20  540  43  1 IO 03  30 2 65  2BO  4  2  4 2  0 84  4 2 0 157  1 2 8 1  72  IO  14 O 3 2  4  DG4  4  0 8 4 0 TE 2 1 5 4 2 2 00 0  1  18  0 8 4 0 TE 12 6 1 7 9 0 10  1 77  2  4 2 2 0  1 3  3  9  10  3 0 3 19  3 4 3 3 82  SL3DG4 8  4  1 0 1 33  8  3  R 5 4 9 3 2 15 4 9 2 8 0 0 AF1F 2F 32  R 5493195 492815 AFTF 20E 84  1  DG2GG3  R 5493220 492800 AFTF 2E 31  R 5493207 492815 RV CA SQ2S 8 8 7 4 99 R 5493200 492815 SUZS 8 4  1  DG1  R 5 4 9 3 2 15 4 9 2 8 1 9 DCTF 3D 10  Page  4  64  4 2 1 265  0 8 0 9 TE 1 14 5 10  1 0 1 25  0 8 0 6 IE ME IS 32 624 5 2 0 2 1 10 42 1 84 0 8 0 6 TE 2 129 3 4 2 2 1 10  3 2  3  1  8  4 50  9  5  0  3  1 95 12  IO 1 47  3  1 2 OS  4  10  20  580  0 3 12  1 4 83  7 1  10  40  760  1 2 3  1 6 50  22  10  30  1 180  3 4 1 34  0 8 0 5 TE 2 2 5 7 0 2 0 2 347 30 27  3  0  3  0 8 0 4 TE DG3 7  3 47 18  GR 1 6  R 5493180 492814 AFTF 2DE 73  2  R 5493185 492790 ANLP 2C 1 7  4  3 44  3  GGI 32  GR 1  1 14  2 0 168  2 30  1 2 35  15  4 2 2 1 17  0 8 0 2 TE 2 1925 0 1 0 3 324 20 33  1 3 14  1 4 82  16  10  20  1 140  4 2 1 154  0 8 0 3 TE 2 5 5 2 0 3 237 10 25  0 3 2 1  1 5 00  15  10  20  720  0 3 14  1 4 90  14  10  20  560  4 2 3 67  0 7 9 7 TE 34 6 2 8 5 0 10  1 0 2 234 20  Listing 233 2 34 235 236 237 238 239 240 24 1 242 243 244 245 246 247 248 249 250 25 1 252 253 254 255 256 257 258 259 260 26 1 262 263 264 265 266 267 268 269 270 27 1 272 273 274 275 276 277 278 279 280 28 1 282 283 284 285 286 287 288 289 290  o f GOOD a t 13 4 7 : 2 6 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  1  2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2  MC82 0 5 4 6 0 5 9 MC82 - 0 5 4 6 0 5 9 MC82 - 0 5 4 6 0 5 9 MC82 -054 6 0 5 9 MC82 - 0 6 6 6 0 6 0 MCB2 0 6 6 6 0 6 0 MC82 - 0 6 6 6 0 6 0 MC82 - 0 6 6 6 0 6 0 MC82 - 0 5 S 6 0 6 1 MC82 - 0 5 5 6 0 6 1 MC82 - 0 5 5 6 0 6 1 MC8 2 -055 6 0 6 1 ML 8 2- 0 6 5 6 0 6 2 ML 8 2- 0 6 5 6 0 6 2 MC82 - 0 6 5 6 0 6 2 MC8 2 - 0 6 5 6 0 6 2 MC8 2 -064 6 0 6 3 MC8 2 -064 6 0 6 3 MC8 2 - 0 6 4 6 0 6 3 MC82 -064 6 0 6 3 MC82 - 0 5 3 6 0 6 4 MC82 -OS3 6 0 6 4 MC82 -05 3 6 0 6 4 MC82 - 0 5 3 6 0 6 4 MC8 2 - 0 6 3 6 0 6 5 MC82 -06 3 6 0 6 5 ML 82 -06 3 6 0 6 5 ML82 0 6 3 6 0 6 5 MC82 0 5 2 6 0 6 6 MC82 0 5 2 6 0 6 6 ML82 0 5 2 6 0 6 6 ML 8 2 052 6066 MC8 2 - 106 6 0 6 7 MC8 2 - 106 6 0 6 7 ML 8 2 106 6 0 6 7 MC82 - 106 6 0 6 7 MCB2 - 107 6 0 6 8 MC82 - 107 6 0 6 8 MC8 2 - 107 6 0 6 8 MC82 - 107 6 0 6 8 MCB2 - 108 6 0 6 9 MC82 - 108 6 0 6 9 MC82 - 108 6 0 6 9 MC82 - 108 6 0 6 9 MC82 - 109 6 0 7 0 MC82 - 109 6 0 7 0 MC82 - 109 6 0 7 0 MCB2 109 6 0 7 0 MC82 - 1 10 6 0 7 1 MC82 - 1 10 6 0 7 1 MC82 - 1 10 6 0 7 1 MCB2 - 1 10 6 0 7 1 MC82 -111 6 0 7 2 MCB2 -111 6 0 7 2 MC82 -111 6 0 7 2 MC8 2 -111 6 0 7 2 MLB 2 - 1 12 6 0 7 3 MC82 -112 6 0 7 3  o n NOV  7,  1984 f o r CCId'KMMC  R 5 4 9 3 1 7 5 4 9 2 8 10 MIFP 5T 126  65  R 5493178 492780 AFTF 2DE 3 1  2  R 5493172 492806 BA ACTF 2D 89 48 64 R 5493138 492755 AFTF 2DE 44  3 47  BL4 49  2  DG4 10  2 1 97  4 2 3 79  5 0 8 0 2 TE 1 2 5 2 0 3 60 26 0 7 9 4 TE 32 6 5 2 9 0 2 1 00  0 7 9 7 TE ME 4 1 3 234 DG2DG1 4 895 0 2 1550 40 1700 1 1 07 i 96 3 79 16 9 5 0 7 8 2 TE 2 54 1 3 GR 1 3 1 4 2 1 2 8 94 10  TH  3  R 5493124 492743 DCTF 3D 27  GG 1 1  R 5 4 9 3 120 4 9 2 7 5 5 S02S 8 79  GR 1 1  R 5493124 492740 AFTF 2E 27 R  Page  1 23  12 5  DG1 2  1 9  GR 1 4  R 54929BO 49260O SOZS 8 5  5  R 5492880 492525 SOZS 8 3 1  2  R 5492848 492493 SQZS 8 6 R 5492819 492470 MCHT 8C 4 R 5492790 492473 MCHT 8C  10  40  900  34  0 3 19  1 4 88  12  10  30  720  23 0 3 24 13 17  1 4 74 92  IS 02  10 35  50 3 37  4 88  14  10  30  340  34  0 18  60  1 5  33  6  IO  30  380  0 7 8 2 TE 9 5 4 2 4 1 2 23 52 101 . 10  2 0 3 17  1 4 40  16  IO  20  740  0 7 7 7 TE 2 269 0 3 2 2 28 10  34 0 3 18  1 5 .62  14  10  30  280  2 20  5  10  30  860  2  17  6  10  40  440  2 24  29  10  160  1400  1 7 25 2 83  5 22  10 25  20 3 97  360  4 2 3 101  0771  14  R 5492874 492517 BA ACTF 2D 73 5 3 42 R 5492874 492495 SOZS 8 4  2 2 27  16  4 0 3 17  5 4 9 3 100 4 9 2 7 1 2  sozs a  0 3 23  1 4 00  0 7 7 9 TE 2 5 0 2 1 2 24 10  4 2 2 137  13  1 2 22  14 0 3 18  BL4GG4  BL4GG4  CA  3 22  4 2 3 48  32 5  4 2 1 65  32 2  4  1 1 72  2  IE 19 5 3 2 2 30 2  0 7 7 4 TE 23 1 0 5 3 3 1 10 0 8 6 2 TE 3 1 0 4 2 3 1 20  34  1 3 5  4 0  0 2  14  1 0 1  0 8 6 5 TE ME 4 2 3 1 1 4 0 1 1 1 27 6 3 1 144 4 10 18 11 2 9 10. 79 4 52 6 10 0 8 7 5 TE G G 4 6 L 4 2 3 17 1 0 14 1 3 0 4 2 3 1 1 66 1 10 2  DG3 1 16 0 9  0897 BL4GG4 2  GG3 2  23 3  17  23 47 3  1 0 70  1 1 43  t  1  20  0 5 2 3 1  0 9 2 0 TE 2 1 0 3 2 2 1 10  14  16  1 3 1  1  1 5 2  1  1 3  1  0 9 4 0 TE GY6BRJ  3  7  1 0  1 10  3  10  40  640  1 78  4  10  30  760  1 39  10  10  30  860  TE  5 5  2  2  14  13  sting  o f GOOD  29 1 292 293 294 295 296 297 298 299 3O0 3U 1 3C2 30 3 304 305 306 30 7 3o8  3 4 1 2 3 4 1 2 3 4 I 2 3 1 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 .1 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  3*19  3 10 3 1 1 3 12 3 1 3 3 I 4 3 15 3 Ik 3 1 7 3 18 3 19 320 32 1 )22 J? 1 i.'4 3 2') 3 2 fa 32 ' 328 329 3 30 33 1 332 333 334 335 336 337 338 339 340 34 1 342 343 344 345 346 347 348  a t 13.47:26  MC82 -112 6 0 7 3 MC82 - 1 1 2 6 0 7 3 MC82 -113 6 0 7 4 MC82 - 1 1 3 6 0 7 4 MC82 - 1 1 3 6 0 7 4 MC82 - 1 1 3 6 0 7 4 MC82 114 6 0 7 5 MC8 2 -114 6 0 7 5 Mf 8 2 -114 6 0 7 5 MC8 2 - 1 1 4 6 0 7 5 Ml 8 2 115 6 0 7 6 Ml. 8 2 115 6 0 ? 6 Ml. 8 2 1 15 6 0 7 6 M C 8 2 115 6 0 7 6 Ml 8 2 1 16 6 0 7 7 Mf 8 2 1 16 6 0 7 7 MC8 2 1 16 6 0 7 7 MC82 -116 6 0 7 7 Ml 8 2 - 1 1 7 6 0 7 8 Ml 8 2 117 6 0 7 8 Ml 8 2 117 6 0 7 8 Mi.82 -117 6 0 7 8 MC 8 2 - 1 1 8 6 0 7 9 MC 8 2 M ! 6 0 7 9 MC" 8 2 i i a 6 0 ?9 Ml'8 2 1 1 86 0 7 9 MCB 2 1 19 6 0 8 0 MC 8 2 1 1 96 O 8 0 Ml 82 1 1 96 0 8 0 MC 8 2 1 19 6 0 B 0 Ml 8 2 - 1 20 6 0 8 1 Mi 8 2 1 20 6 0 8 1 M- 8 2 I 20 6 0 8 1 Mi. a 2 120 t o d 1 Mi 8 2 1 2 16 0 B 2 MCB 2 12 1 6 0 8 5 MCB 2 12 1 6 0 8 2 MCB 2 12 1 6 0 8 2 MC82 - 122 6 0 8 3 MC82 122 6 0 8 3 MCB 2 - 122 6 0 8 3 MC82 122 6 0 B 3 MC82 - 123 6 0 8 4 MCB 2 -123 6 0 8 4 MCB 2 - 123 6 0 8 4 MC82 - 123 6 0 8 4 MC82 124 6 0 8 5 MC82 - 124 6 0 8 5 MC82 - 124 6 0 8 5 MC82 - 124 6 0 8 5 MC82 -04 3 6 0 8 6 MCB 2 -043 6 0 8 6 MC82 -043 6 0 8 6 MCB 2 04 3 6 0 8 6 MC82 -039 6 0 8 7 MCB 2 -039 6 0 8 7 MC82 0 3 9 6 0 8 7 MCB 2 0 3 9 6 0 8 7  o n NOV  7.  1984 f o r CC i d = KMMC P a g e  2 1 R 5492789 DKMA 6M  R 5492011 493645 SOZS 8 OOOO R 5492010 493650 SCCL 8C 8 GOO  10  30  1280  4 88  4  10  20  160  1 6 40  6  IO  30  240  6  2 40  4  10  30  20O0  1 0 4  2 53  20  10  30  160O  1 1  10  40  1200  13 0 0 17  t 2 49  1 2 1  34 0  3 S3  0 9 7 5 TE 32 125 3 5 10  1 2 5  34  1 1 27  10  1 0 12  4 40  1 3 1  13 2 6 4  12 14 0 0  165  120  400  60  2 6 8  12 13 0 0  32  20  200  140  23 1  4  0G1GR2 1  12 2  4 3  GR 1 1  23 1  7  4 5 24  0  0 9 9 0 TE  GR 1  3 3  I  GR 1  3  t  0 54  4 2 2 255  4 2  3  3  0 86  1 2 10 0 7 6 5 TE 3 1 4 5 IO SO  0 7 6 8 TE 3 1 4 3 2 3 5 70 5 0764  GR 1 5  23 3  4 2 O 142  38 6  4  4 4 2  GR 1  3 2  2  4 2 0 300  4 3 20 0 7 6 7 TE 12 17 4 3 80 0767  4 4  2  0 2 1  3  3 1  7 2  0 33  493630  3  34  6  2 3 12  1 4  16  12  20  70  340  3 5  1 2  37  6  10  40  360  2 6 10  1 4  18  15  20  40  420  2 4 1 1  1 3 62  14  10  40  100  0 4 5  1 4 5 1  1 1  IO  30  40  7  4 50  9  10  20  1040  4 80  5  10  20  860  TE  2 O fad  34  TE  1 10 0767  3  GG4  2 3 6  34  2 3 12  34  0  TE 1 3 3  20  3  16  2  0 7 6 7 TE 1 1 3 3 3 3 .40 2  86  1173 TE 1  3  72  493725 70  10  2  0 9 6 5 TE 2 17 3 2 10  492645  72  87  1  1 2 342 4  SL3  18 1  20  0 9 5 7 TE 1 O 2 0 2 7 10  4 2 2 123  492652 143  R 5492805 MCHT 5C  35 4  DG 1 1  BL 4  R 5 4 9 2 198 4 9 3 6 6 3 SCCL 8C 3650  R 5493225 DBLT 3BC  2  6  0 9 6 0 TE 3 157 5 2 10  493666 345  R 5492998 MTFF 5T  1 0 190  492450  R 5492010 493635 SCCL 8C OOOO  R 5492998 VEIN  14  492460  20  H S492005 SPSC BG  14 1  492462  1 1 R 5492734 MIFF 5T  DG2 1  0G1  4 R 5492745 DCLP 3C  23  492453 10  R 5492760 ACTF 2D  1  492438 37  R 5492769 SCCL ac  1  DG2GG4 1  4 1  4  1 3 68  10 1024 TE 34 6 3 4 2 0 10  8  1 0 1 13  23 0  O 2  Page 176  o  GO co O  o  CN CN  CN —  n  CO  in  o  CN T n  n  ci CN  —  _  cn  o Ul O  O  iI  O  t— r co n Ol CN O ~ CN  r»  o  CN  o  o  CN  ci O 0) T  o  O  UJ >- cn CN o n m CO 10 Ol O C  o» CO in  O O  m  T  u  < cj  o CO  4 ci o n 0) T _l in a . o  O CM  in o m CO CN 01 1 IA m  o  O  T  *T n  QC l/l a co so CD oo en cn cn  o oo oooo 10 iO 10 10 <0 10 10  CO ci cn i  CN ci  o CO  o CO 10 CN CN 01 «x tm - 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 O  CN IP t o — CN  ** cn  •T  _ CN  in  cn  UJ o  cn CN CO -  *-  CN  r-  o o  f- o  rn  -  —  o  *-  cn cn T  cn  177  a <  o  —  in cn  m cn  T cn  T 01 T  CO ed Q CO n CN 01 *T u. in CJ a a  m a m u « CN  — CN CN CN CN cn cn m cn *r n v  cn in cc  U3 10 (0 10 10 10 10 10 10 10 (0 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 (0 10 10 (0 10 10 10 U9 10 (0 10 CN CN CN CN CO CO CO CO rn cn cn rn m cn 0> 01 T T T T in in in in O o O o 10 10 10 10 m T 10 10 10 10 10 10 10 10 T T *T T 10 10 10 10 •7 10 10 10 10 10 10 10 i 0 in in in in 10 10 10 10 cn o o O o o "~ o O o o O 7" o O o o rN CN CN CN CN CN CN rN CN CN CN Ci CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CN CO CO CO CO CO CO CO CO CO CO CO 3} CO CO CO CO CO CD CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO SO CO -J U o (J U ( j u u u U U J <J <J u (J u u O u u u o u 1J u u u u X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X T CN m CN n T CN cn *T CN r*i T rN cn CN rn T CN cn 1 CN cn T CN n *y  -  -  -  <ncnO — C N n n ' i n ^ r ^ a j o i O cNcnn'^uif^cocno^cNM -*^r^rNrNCNr^<NojfN(NCNnnrinrnonnnn -  -  u  <  m in in uj 10  -  10 10 10 in in m cn cn m O O O CN GO \J X  CN CO u X  CN cn  CN CO (J X  > t i n go f 465 466 467 468 469 470 47 1 472 473 474 476 476 477 478 479 480 48 1 482 483 484 485 486 487 488 489 490 49 1 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 5IO 5 1 1 5t2 513 514 5 15 5 16 517 518 5 19 520 52 1 522  GOOD a t  13 : 4 7 : 2 6  o n NOV  7. 1984 f o r  C C I d * KMMC  Page  9  6 2 3  4  1 MC82- 167 61 17 a  5492878 494155 6 117 RVBC 4 GG5DG2 61 17 5 2 6117 6 1 18 R 5 4 9 2 8 6 5 4 9 4 1 3 1 28 61 18 AGLM 0G2 6 118 1 1 1 6 1 18 6 1 19 R 5 4 9 2 8 5 5 4 9 4 1 5 3 6 t 19 DCTF 30 GR3 6 1 19 1 38 6 1 19 6 120 R 5 4 9 2 8 3 0 4 9 4 1 10 2B DG2 6 120 A B T F 6120 38 2 6 120 6 12 1 R S 4 9 2 7 9 5 494 1 17 2A DG2 6 12 1 ANFL 49 2 6 12 1 6 12 1 6 122 R 5 4 9 2 7 8 0 4 9 4 0 9 8 BA 6 122 ANFL 2A CA DG2 1 6122 76 54l 79 16.91 6 122 6 123 R 5 4 9 2 7 6 5 4 9 4 0 8 6 6 1 2 3 ANBX 2B 0GIBL3 1 6 123 63 6 123 6124 R 5492730 494065 6 1 24 ABTF 2B DG2BL3 6 124 27 2 6 124 6 125 R 5 4 9 2 7 0 3 4 9 4 0 5 9 2BC 6 125 ABLT DG1BL3 1 6 125 8 6 125 6 1 26 R 5 4 9 2 6 8 B 4 9 4 0 6 0 6 126 D C L P 3C DG2GR3 6 126 1 5 6 126 6 127 R 5 4 9 2 6 7 3 4 9 4 0 6 4 6 127 D C L P DG4 3C 6127 1 8 6 127 6 128 R 5 4 9 3 0 2 2 4 9 3 9 0 3 6128 DCLT 3CD BL3 1 6128 9 6128 6 129 R 5 4 9 3 0 2 O 4 9 3 8 8 5 6 129 D C L T 3CD GR 1 6 129 6 8 6 129 6 130 R 5 4 9 3 0 3 7 4 9 3 8 9 5 6 130 D C F T 30 OG2BL3 14 6 130  2 MC82- 167 3 MC82- 167 4 MC82- 167 1 MC82- 169 2 MC82- 169 3 MC82 - 169 4 MC82- 169 1 MC82- 168 2 MCB2- 168 3 MC82- 168 4 MC82 - 168 1 MCB 2 - 0 3 4 2 MC82 -0 3 4 3 MCB2 - 0 3 4 4 MC 6 2 -0 3 4 1 MC82- 172 2 MCB2- 172 3 MC82- 172 4 MC82- 172 1 MCB2 - 173 2 MC82- 173 3 MC82- 173 4 MC 82 - 173 1 MC82- 174 9 MC82 - 174 3 MCB2- 174 4 MC82 - 174 1 MC82 175 2 MC8 2 175 3 MC82 - 175 4 MCB 2 175 1 MC82- 176 2 MC82- 176 3 MC 8 2 - 176 4 MCB2 - 176 1 MC8 2 177 2 MC82- 177 3 MC82 - 177 4 MC82 - 177 1 MC82 - 178 2 MC8 2 - 178 3 MC82 - 178 4 MC 8 2 -1 78 1 MC82- 157 2 MC82- 157 3 MC82- 157 4 MC82- 157 1 MC82 - 158 2 MC82- 158 3 MC82 - 158 4 MCB 2 158 1 MC82- 159 2 MC82- 159 3 MCB2- 159 4 MC8 2 -159 6 130 1 MC82- 160 6 131 R 5 4 9 3 0 3 5 4 9 3 9 2 0 2 MC82- 160 6 13 1 ANLP 2C  t  DG2  10  1  55  1135 TE 12 0 0 0 2 1 10  3 2 3 5  1 2 40  4  10  10  520  1127 TE 10 56 t  2 3 tot  23 0 0 13  4 89  5  IO  10  120  10 46 2  1117 TE 2 3 234 1259 0 0 0 3 123 4 3 58 20 2 6  1 4 61  7  IO  20  260  19  6  IO  30  lOOO  4 7 1  6  10  40  460  to33  40 2 51  34 2  12 t  4 2 3 106  14 2 3 65  4 10  5 0 0 0 2 1  1095 TE 34 6 4 2 8 0 0 O 2 1 10  23 0 3 1 1  1075 TE 2 8 1 7 0 0 0 1 234 1 10  ioo  1  1 1  3  1  13  1  4  2  6 2 3 50  70  4 2 3 87  4 2 3 103  4 2 3 134  4 3 3  12  4 2 2  3 1  IOIO TE 684 1 1 . 20  4 2 3 234  13 2  1  1025 TE 34 6 4 2 5 0 20  72  too  4 2 3  tOOO TE 3 654 1 0 20  1 0 2  t 1 8 3 TE 2 17 0 10  1 2 0 0 TE 32 1246 O  5 IO  60  1 4 60  0  10  0  0  4 25  0  IO  O  0  5 30  o  10  0  O  1  2 0 1 1  0  1 2 1  43 0 3 2  t 3  10  0  10  0  0  1 2 1  43 0 3 4  1 4  15  0  10  O  O  1 0 2 1  13 0 3 7  1 4  10  0  10  0  0  1 0 1  34 0 3 2  1 2 60  5  10  20  2BO  34 O 3 8  1 4 70  4  20  20  180  43 0 3  1  t  TS  2  1195 TE 12 24 0 0 0 t  . to  1 3  5 85 3 63  9  2 0 2 243 2  0 9 9 5 TE 23 14 0 2 10 1187 TE 23 15 5 . 10  23  2  5  4 0 9  1065 TE ME 1 12 2 1 23 4 0 t 8 0 0 0 1 1 t 20 15 11 25 10. 46 6 15 3 42 1052 TE 6 2 3 13 43 4256 0 2 O 2 326 0 3 1 1 55 3 10  36  1  7  t 0 2  Listing 523 524 525 526 527 528 S29 530 531 532 533 534 635 536 537 538 539 540 54 1 542 543 544 545 546 547 548 549 550 55 1 552 553 554 555 556 557 558 559 560 561 562 56 3 564 565 566 567 568 569 570 57 1 572 573 574 575 576 577 578 579 580  of  GOOD a t 1 3 : 4 7 : 2 6 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  MCB2- 160 MCB2- 160 MC82- 179 MCB2- 179 MC8 2- 179 MC82- 179 MC82 - I S O MC82- 180 MC82- 180 MC82 - 1B0 MC82- 18 1 MC82- 181 MC82 - 18 1 MC82 - 18 1 ML 8 2 -182 MCB2 - 182 MC82- 182 MC82 - 182 MC82 - 183 MC 8 2- 183 MC82 - 183 MC82- 183 MC8 2 184 MC82- 184 MC82- IB4 MC82 - 184 MCB2 - 1B5 MC82 - 185 Ml 8 2 -185 MCB2 - 185 Mi 8 2 -1B6 MC 8 2 -186 MC 8 2 -186 Ml 82 - 186 MC82- 187 MCB2 - 187 MC82 - 187 MC82 - 187 MC82 - 188 MC82- 188 MC82 - 188 MCB2 - 188 MC82- 1B9 MC82- 189 MC82- 1B9 MC82- 189 MC82- 190 MCB2- 190 MC82- 190 MC82 - 190 MC82- 19 1 MC8 2- 19 1 MC82 - 191 MC82- 19 1 MCB2 - 192 MCB2- 192 MC8 2 192 MCB2 - 192  6131 6131 6 132 6132 6132 6 132 6 133 6 133 6133 6133 6 134 6134 6 134 6 134 6 135 6135 6 135 6 t35 6 136 6 136 6 136 6 136 6137 6137 6 137 6137 6 138 6138 6138 6 138 6 1 39 6 139 6 139 6t39 6 140 6 140 6 140 6 140 614 1 614 1 614 1 6 14 t 6142 6142 6142 6 142 6143 6 143 6143 6 143 6 144 6 144 6144 6 144 6145 6 145 6 145 6 145  on NOV  7.  1984 f o r CCId-KMMC  IS  5  R 549240O 494105 SOZS 8 30  2  R 5 4 9 2 3 5 5 4 9 4 tOO SOZS 8 6 R 5492355 494088 SOZS 8 15 R 5492355 494018 SOZS 8 4 R 5492319 493005 ACTF 20 4 R 5492315 493968 DA CA DCFL 3A 2 72 5 1 R 5492303 493947 OCFL 3A AN CA 14 63 66 R 5492301 493945 VEIN 3 R 5492284 493915 ANLP 2C 5  1  3  R 5492425 494020 SPSC 8G 8  Page  GR1GR2  3 20  IO  145  to  . 10  OO  5  10  20  320  1 3 7  1 3 90  63  20  10  340  4 4 2 3 1  4 0 3 1  1 . 2 00  9  10  30  1460  4 3 2 3 1  4  1 2  10  4  10  20  840  4 2  1 2 1  4  2 75  5  IO  20  1060  1 3 3  4 0 12  4 15  4  10  10  720  4 0 0 5  3 75  4  10  20  680  1 2 65 5 38  3 3 1  10 07  20 1 OO  200  3 85 3 58  9 2 01  10 13  20 2 19  1460  1 2 45  3  3200  10  80  2 85  5  40  20  860  6 55 3.97  6 t oa  10 23  20 2 8 t  380  2 50 2 76  4 t 79  IO 1 1  20 1 74  1060  4 70  6  10  20  840  9 85 1 69  4 03  10 27  20 2 66  120  0 9 0 7 TE 2 1 4 4 2 3 4 10  4 2 1 120  1 1  4  0 9 0 7 TE GR3GR2  23 1  14 2 1 62  2  23 1  2 0 56  GR 1 1  3 14 2 0 1 43  2 20 0 9 0 5 TE  GRIBL3  10  1 3 1  0 9 1 0 TE  14 2 1 46  0 9 2 0 TE 2 14 10  3  4 24 3 2 70  0 9 2 7 TE 2 1 4 10  TS 3 1 2 1  GR1DG4 02 1 1  DG3DG4 1  6  CA B L 3 1 13 9 5  4 12 1 3 67  CA B L 3 1 16 57  01 34 2 5 77  GG 1 1  BL3DG2 1  10  38 19  10 2  1  1 0 1  0 9 2 8 TE ME TS 2 138 1 1 2 8 0 1 0 1 24 0 3 IB t 10 2 50 92 1 79 0 9 3 0 TE ME TS 1 2 2 129 5 3 t 2 34 0 0 42 10 2 9 -74 2 05 3 19 0 9 3 0 TE 14 2 6 1 0 0 1 I 2 2 1 90 3 1  4 3 3 32  3  0 9 3 5 TE 614 5 2 0 2 7 20  24 0 0 3  R 5492272 4938B3 0 9 3 7 TE ME AGLM 2AB AN TH CA DG2 31 5 2 2 4 5 0 1 0 3 32 2 0 127 t 1 59 14 30 2 57 82 2 87 16 9 1 11 1 3 2 66 10 OO R 5492260 493862 0 9 4 3 T E ME TS P H 2 1 4 3 0G2GG4 31 GWAV 7 4 3 3 34 15 5 1 0 1 3 0 0 7 1 t 22 . 10 4 8 6 9 16 4 06 .56 1 36 15 12 3 75 R 5492256 493850 0 9 4 3 TE MTFF 5T 3 1 2 0 BKIBL3 1 1 2 t 1 1 0 0 1 9 1 52 16 10 10 R 5492250 49380O BA BSLT IA 18 52 33  5  0940 TH 0G2 3 14 43  3 12 2 2 1 55 16 23  4 97  TE ME TS 4 0 2 0 3 132 4 2 8 23 . 10 3 87 7 4 1  t  cQ CD  Listing 58 1 582 583 584 585 586 587 588 589 590 59 1 592 593 CJ4 595 516 597  598 519 6u0 bu 1 6u2 6c>3 604 6l>5  b')6 6(.7 6 i i8  h- .9 C l.i  o f G000  at  2  3 4 1  ? 3 1 1  2 3 4 1  2  3 ML 8 2 4 MC 8 2 1 Ml 8 2 2  Mi  t 1 2  4  M.  6 i 1  1  M  6 i 4  M 3  b lb  4 M i H2 1 Mi 8 2  628 629 6 30 63 1 632 633 634 635 6 36 637 638  1984 f o r CCid'KMMC  Mi  199  20 1  6 154  2iM Ml 8 2 - 2 1 ) 4 3 M L 8 2 - 204 4 MCB 2 204 1 MCB 2 2 0 5 2 M C 8 2 -205 3 MCB 2 - 2 0 5 4 MC8 2 -205 1 MC82 206 2 MC82 - 2 0 6 3 MC 82 206 4 MC82 -206 1 MC82 -207  6 1 55  2  2 3 4 1 2 3 4 1 2  0947 BK 1  3 1  11  17  1  36  7 26  BL3  36 1  2  0 58  TE Mf. TS 1 3 2 1 65 2 40  . 10 84  18 0 0 15 1 95  4 2  90 50  10 12  30 3 11  640  10  20  IO 22  20 2 05  160  1018 1 1  TH 0 G 3  14  35 4 1 7 93  1 1  1 4 16  3 1 1  BL3 1  4  2 43 42  2  12 3 3 20  1 2 22  14 O 3 14  PH 1000 TE ME 2 23 14 1 1 0 3 12 0 3 35 12 13 20 7 1 2 23 6 32 0 9 9 5 IE 3 3 23 18 5 1 0 1 24 0 0 3 19 5 20 3  GR2GG5 1l  13 1  4  13 1  BL 1 1i  4  4  2  3 3 t  3 45  3  IE 14 5 1 O 3 IO  1 3  50  1 4 95 1 83  1140  2  45  40  340  2  95  30  200  4  80  10  30  100  50  IO  30  480  10 14  3<l 2 14  3 05 4 1  10  20  5  10  0986  0 9 8 3 IE 12 81 1 2 10 0960  BL2 1  25  6 152  Page  4  6  2  1  2 60  12  1 34 0  1  1  0 6  124  1 0  3  6  TE 1 0  3  IO  2 2 12  4  0  3  1  10  3  1 99 C 152  2; i i ) 0 15 3 8 2 2l-| ' lb I H 2 2<r j C 15 J 8 2 6 lb J H 2 2 " i 6 154 H : 2 D I I, 1 5 4 8 2 212 1 b 1 54  1. i 5  620 62 1 622 623 624 625 626 627  7.  - 193 6 146 R 5 4 9 2 2 4 4 4 9 3 7 5 3 5A - 193 6 146 MARG 16 - 193 6 1 4 6 193 6 146 6 1 95 - 194 6 1 4 7 R 5 4 9 2 0 7 7 4 9 3 8 8 0 - 194 6 147 D C L P 3C - 194 6 147 20 - 194 6 147 - 195 6 148 R 5 4 9 2 105 4 9 3 8 7 5 2BC BA 195 6 148 ABLT - 195 6 148 23 i9S 6148 64 . 0 3 196 6 149 R 5 4 9 2 1 14 4 9 3 8 8 3 t.V 112 196 C 1 19 D C L P 3C MCB 2 1 9 6 6 149 6 MC 8 2 196 6 149 MCB 2 - 197 6 150 R 5 4 9 2 1 2 6 4 9 3 8 8 4 Ml 8 2 197 6 150 GWAV 7 4 MC B 2 197 6 150 MC82 - 197 6 150 t 9 8 6 15 1 R 5 4 9 2 1 4 0 4 9 3 8 9 0 MC8 2 51 MC8 2 198 6 15 1 M I F F MCB 2 199 6 15 1 1 1 McB2 198 6 15 1 M C 8 2 199 f> 152 R 5 4 9 2 1 9 6 4 9 3 8 7 5 5T M L 8 2 - 199 6 152 M I F F  1 Mi  b 18 6 19  26 o n NOV  1 MC82 MC82 MC8 2 MC82 MCB 2 MC82 MC82 MC82 MC82 2 MC8 2 3 MCB 2 4 MC H 2 1 MC6 2 2 3 4 1 2 3 4 1  ti 1 t  6 1 7  13 47  b 155 6 155 6 155 6 156 6 156 6 156 6 156 6157 6 157 6 157 6 157 6 158 -207 6 158 -207 6 158 -207 6 158 -208 6 159 -208 6 159 -208 6 159 - 208 6 159  MC82 MC82 MC82 MC82 MC82 MC82 MC8 2 MCB 2 - 2 0 9 MC82 - 2 0 9  K 549.17 1 0 4 9 2 4 4 8 Oil 1 K 0 DA CA  0 9 4 4 TE ME TS CA GR 1 02 4 2 2 23 1279 0 2 0 1 1 2 3 1 1 82 2 6 0 2 40 12 4 37 65 B I 15 67 73 2 73 64 R 5 4 9 1 8 / 8 4 9 2 4 15 1020 TE ME DA 1 A CA DG WW2 4 3 ANt t 2A 2 3 2 2 78 0 0 0 1 82 0 3 1 6 18 69 2 10 13 66 4 60 40 15 20 65 1 B2 2 5 1 R 5 4 9 3 7 9 5 4 92 2 2 0 0 9 3 5 IE ME AGLM 2BC AN CA CA GR 1 4 6 2 3 4 6 0 2 1 2 13 0 1 19 1 96 25 20 29 55 72 16 35 8 72 11 0 9 3 02 4 75 R 5493843 491990 0 9 1 5 T E ME TS 6352 MTFF 5T AN 3 4 1 t 3 14 3 1 2 GG2 4 0 58 60 i 39 R 5493857 491994 ANLP 2C 16 R 5493123 492035 ANFL 2A 84 R 5493114 SCCL 8C  11  14  174  85 GGSDG1 11  152  7  15  23 10  4  2 3 23 1 13  6 160 R 5 4 9 3 1 11 4 9 2 0 3 3 6 160 S 0 2 S 8  6529 .20 0866  0G1  1 3  1  2 2 3 128  492033 54  40 98 6 00 0 9 2 7 TE  GR 1 1  GR3  1  4 2  1  2  4  2  2 95  2  2 20  3 3  TE 8 0  16  16 58  2  2  34  8  0 0 1 19  0 8 5 7 TE 12 178 4 3 1 2 SO 30 0 8 5 7 TE 2 179 4 5 2  3  23  0 3 14  0 26  3 0 3 35  34  0 3  1 2 90 2 56  1800  1 4  3  80 99  4 85 2 91 1 2  95  5  35  13  20  30  3 96  10 2 1  40 3 75  10  1  820  1700  40  460  20  180  PJ < T >  LQ  1 5  700  1 53  80  10  20  CD O  Listing 639 640  t  64 642 643 644 645 646 647 648 649 650 65 1 652 653 654 655 656 657 658 659 660 661 662 66 3 664 665 666 66 7 668 669 670 67 1 672 673 674 675 676 677 678 679 680 68 1 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696  o f GOOD a t 13 4 7 : 2 6 3 4 1 2 3 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  1  2 3 4 1 2  3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  t  2 3 4 I 2 3 4  1  2 3  MC82 - 2 0 9 6 160 MC82 - 2 0 9 6 160 MC82 - 2 10 6 1 6 1 MC82 - 2 10 6 1 6 1 MC8 2 -2 10 6 16 MCB 2 -2 10 6 1 6 1 MC8 2 - 2 10 6 1 6 1 MC82 -2 1 6 162 MC82 2 11 6 162 MC82 -2 1 1 6 162 MC82 -2 1 6 162 MCB 2 -2 12 6 163 MC82 -2 12 6 163 MC8 2 212 6 1 6 3 MC82 -2 12 6 163 MCB 2 -2 13 6 164 MCB 2 2 13 6 1 6 4 MCB 2 - 2 1 3 6 164 MCB 2 -2 13 6 164 MC82 -214 6 1 6 5 MC82 -2 14 6 165 MC82 -2 14 6 165 MCB2 -2 14 6 1 6 5 MC82 -2 15 6 166 MCB 2 2 15 6 166 MC8 2 2 15 6 166 MC82 -2 15 6 166 MC82 2 16 6 167 MC8 2 -2 16 6 167 MCB 2 -2 16 6 167 MC82 2 16 6 1 6 7 MCB 2 -2 17 6 168 MC8 2 2 17 6 168 MCB 2 217 6 1 6 B MCB 2 -2 17 6 168 MC82 -2 18 6 169 MC82 -2 18 6 169 MC82 -2 18 6 169 MC8 2 2 18 6 169 MC82 2 19 6 170 MC82 - 2 19 6 170 MC82 -2 19 6 170 MC8 2 -2 19 6 170 MC82 - 4 0 0 6 1 7 1 MC82 -40O 6 17 1 MCB2 - 4 0 0 6 1 7 1 MC82 -4O0 6 17 1 MC82 -401 6 1 7 2 MC82 -401 6 1 7 2 MC82 -401 6 172 MC82 -401 6 1 7 2 MC82 -402 6 1 7 3 MCB 2 -402 6 173 MC82 -402 6 173 MCB 2 -402 6 1 7 3 MCB 2 4 0 3 6 174 MCB 2 4 0 3 6 1 7 4 MC82 -403 6 174  t  t  t  o n NOV/  7.  I9S4  f o r CCId'KMMC 4  5  Page  2  12  27  1  10  GR I 1  0 8 5 5 TE ME 3 4 2 3 23 179 4 5 2 3 1 1 28 20 1 28 20 2 63 .44 1 50 0 8 5 3 TE ME TS 3 4 2 1 21 . 10 5 .•0 9 44 2 58 0 8 7 9 TE 17 24 1 7 4 5 2 2 2 2 39 40  R 5493055 492035 SOZS 8 2  GR 1 1  17 1  4 2 2 35  R 5493018 49I0O7 SOZS 8 13  GR 1 1  17 7  4 2 2 32 64  R 5493110 492030 DCLP 3C RY CA 2 2 73 9 0 R 5 4 9 3 108 4 9 2 0 3 0 SOZS 8 3 7 1 44 R 5493065 492034 SCCL BC 2  GR3 1 1 13 4 0  CA  GR 1 3 13 . 6 5  R 5493005 491005 SOZS 8  GR 1  t  1  R 5 4 9 2 9 7 8 49 1972 GWAV 7 12  t  t  t  24 4  4 2 2 47  G R I D G 1 23 1 4  4  2  43 0 3 5 5 58  500  4 4 1 16  10 10 03  20 20 1 92  360 360  3  15 60  3 3 06  10 02  20  900  3 36  3  IS  2  10  20  660  10  2 05  3  10  20  940  9  2 55  2  10  20  400  1 60  5  10  20  760  43 0 3 7  1 2 45  24  10  20  1200  34  1 4  IO  67  10  20  560  6 20  3  10  20  180  to  20 6 34  too  0 9 2 5 TE 2 16 4 5 2 2 1  4  to  34  1  0 9 7 5 TE 127 5 4 2 2 2 3 23 85 10 2  20  1 0 12  43  5 2 2  1 70 1 70 4 39  13  4  10  1  15  0 8 8 5 TE 7 4 5 2 2 1 50  0 9 4 7 TE 2 1 4 20  4  0 3 7  1  1007 TE  R 5492943 491943 SOZS 8 56  GR 1 1  R 5492910 491938 ACTF 2D 29 R 5492895 491943 ACL T 2CD BA 590 43 55 0 5493400 492128 AFTF 2E 61  t  1 50  6  0G1 1  TH  DG 1  to14  16  5- 18-02 DG2  t  3  2 0 1 14  2  3  4 2 2 73  1  90  4 4 0 3 7  1 0 3 0 TE 12 1 0 3 . 20  1 2 19  1 0 25  1 0 4 0 T E ME TS 3 12 17 0 2 0 2 1 2 3 4 2 1 80 20 46 18 20 19 102 4 06 6 39 0 1 7 6 0 0 1 7 8 0 0 7 6 0 TE 4 2 2 2 79 4 4 3 2 73 0 3 2 90 .20 6 26  t  t  t  0381 0 0 3 8 3 0 0 7 6 0 TE 1 4 2 2 12 45 4 5 2 2 47 250 1 30 43  D 5493400 492128 AFTF 2E 55  5- 18-02 DG1 1  D 5493400 492128 AFTF 2E 2 1  5- 18-02 0 5 1 4 0 0 5 1 6 0 0 7 6 0 T E DG3BL3 4 4 2 3 2 3 1247 4 3 2 2  0 5493400 492128 DF T F 3E 6  5- 18-02 BL3 3  1  34  2 3 15  135  20 0660 3  0  30  0 6 6 2 0 0 7 6 0 TE 4 2 2 2 7 0 1 16 IO  t1 12  t  12 26  33  3 .70  2  10  60  640  4 10  53  20  80  860  38 0 3 19  1  38  6 3 16  1  4 40  10  10  60  1200  1 3 8  1 2 50  3  10  40  1760  36  3  2 12 OO . 1 29  4  Listing 697 698 699 70O 701 702 703 704 705 706 707 708 709 7 10 7 1 1 712 7 13 7 14 7 15 7 16 7 17 7 18 7 19 720 72 1 722 723 724 725 726 727 728 729 7 30 731 732 733 734 735 7 36 737 738 739 7 40 74 1 742 743 744 745 746 747 748 749 750 75 1 752 753 754  o f GOOD a t 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1  13.47:26  MC82 -403 MC82 -404 MC82 -404 MC82 -404 MC82 -404 MC82 - 4 0 5 MC82 - 4 0 5 MC82 - 4 0 5 MC82 - 4 0 5 MC82 -406 MC82 -406 MC8 2 -406 MC82 -406 MCB2 -407 MLB 2 -407 MCB2 -407 MCB2 -407 MCB2 -408 MC82 -408 MC82 -408 ML 8 2 -408 MC82 - 4 0 9 MC82 - 4 0 9 MC82 - 4 0 9 ML 8 2 - 4 0 9 MC8 2 -4 10 MC8 2 4 10 HC8 2 -4 10 MC82 -4 10 MC82 - 2 2 0 MC82 - 2 2 0 MC8 2 2 2 0 MCB2 2 2 0 ML 8 2 -22 1 ML 8 2 22 1 MCB2 -22 1 MC82 22 1 MC82 -222 MCB2 -222 MC82 -222 MC8 2 -222 MC82 - 2 2 3 MC82 - 2 2 3 MC82 - 2 2 3 MC82 - 2 2 3 ML 8 2 -224 MC8 2 -224 MC82 -224 MC82 -224 MC82 - 2 2 5 MC82 - 2 2 5 MC8 2 -225 MC82 - 2 2 5 MC82 -226 MC82 2 2 6 MC82 -226 MC8 2 -2 26 MCB2 -227  o n NOV  7.  1984 f o r C C i d » K M M C  6174 6175 D 549340O 492128 2D 6 175 A C T F 6 175 177 6175 6176 0 5493400 492128 6 176 A C T F 20 6176 168 6 176 6 177 D 5 4 9 3 4 0 0 4 9 2 1 2 8 6 177 O C L T 3C0 6 177 16 6 177 6 1 7 8 D 5 4 9 3 4 0 0 4 9 2 128 6178 08L T 3BC 6178 4 1 6 1 78 6 1 79 D 5 4 9 3 4 0 0 4 9 2 1 2 8 6 1 7 9 DCLT 3C0 6 1 79 19 6 179 6 180 D 5 4 9 3 4 0 O 4 9 2 128 30 6 180 D C T F 6 180 12 6 180 6 18 1 0 5 4 9 3 4 0 0 4 9 2 1 2 8 6 18 1 D C F L 3A 6 18 1 8 6 18 1 6 182 R 5 4 9 2 4 0 O 4 9 3 8 2 6 6 182 ANLP 2C 6 182 2 6 182 6 183 R 5 4 9 2 3 7 7 4 9 3 8 3 1 2B 6 183 A B I F 6 183 35 6183 67 5 8 6184 R 5492347 493857 6 184 S U 2 S 8 6 184 24 6 184 6 185 R 5 4 9 2 3 4 0 4 9 3 8 6 2 6 165 M I F F 5T 6185 58 6185 6 186 R 5 4 9 2 3 2 1 4 9 3 8 6 3 6 186 MARG 5A 6 186 67 6 186 6 187 R 5 4 9 2 3 0 5 4 9 3 8 6 7 6 187 D C L P 3C 6187 3 6 187 6 188 R 5 4 9 2 3 0 5 4 9 3 8 5 0 6 188 ANFL 2A 6 188 44 6 188 6 189 R 5 4 9 2 2 9 5 4 9 3 8 5 0  5-18-02 0G2  1 5-18-02 DG1 1  Page  0 8 7 6 5 878 .5 4 2 3 5 225  0 7 6 0 TE 2 68 0 2 1 2 10 2 1  0 9 2 5 .0 0 9 2 7 O 0 7 6 0 TE 4 3 3 2 6179 0 2 1 1 4 1750 20 30  23 O 3 22  t 3  23  22  5 - 1 8 - 0 2 1066 0 1068 0 0 7 6 0 TE G<6 4 3 3 32 1964 5 2 2 1 75 . 10  1 2 8  4 0  5 - 1 8 - 0 2 1163 0 GV3BL3 4 1 4  1 165 0 0 7 6 0 TE 1 3 123 1246 O 3 52 10  1 2 8  4 0 3 5  5 - 1 8 0 2 1348 0 4 0G2GR1 3 6  1 3 5 0 .0 0 7 6 0 TE 1 2 23 6 19 0 3 2 2 134 to 8  24  5-18 0 2 1513 0 4 DG2BL2 7 2  1515 0 0 7 6 0 TE 2 2 23 69 4 4 2 3 153 1 1 10  34  5 - 1 8 - 0 2 1595 0 1597 .0 0 7 6 0 TE 0G4BL1 2 1 0 7 0 O O 4 5 4 22 6 10  DG4 1  DG1SL3 1 1 15 6 8 BL 2 1  GV1BL2 2  36 1  4 6 47 1  3  02 2  1  DG1 3  2  0 8 8 5 TE 6 0 2 0 2 1 10  1 1 62  0 9 1 0 TE 1 0 2 0 2 . 20 45 0 9 1 2 TE  1  DG3 1  1 1 15  0893 IE 36 64 1 2 34 12 5 3 1 2 1 32 1 . 20 3 .3 1 57 1.64 0 9 0 8 TE 4 2 3 32 3 8127 0 4 2 1 2 31 1 30  BK1 2  4  1  7  1 0 53  . 30  1 4 2 2  1 1  10  30  1540  1 5  90  10  10  2 10  2200  1 55  3  10  30  360  1 .50  4  10  70  420  1 2 OO  3  10  30  740  7  IO  30  440  1 30  14  20  30  80  1 20  5  IO  30  380  1 90 2 78  4 2 98  10 10  20 2 58  2  0  3 3  0  3  1  1  5  2 2 5 3  134  2 . 50  1  2 3 2  43 0 2 1 77 42 O 3 4  1 O 19  1  38  0 9 2 0 TE 4 2 3 23 128 0 4 2 2 4 3 2 22 1 10  2 2 3 68  1 5 40  1 18  2 3 2  0 9 2 0 TE 2 78 0 0 0 1 8 2 3 0 3 26 40 28  1200  1 2 60  3  20  20  940  4 45  7  10  10  1760  4 35  7  IO  20  880  4  20  30  1260  1 1 95  01  LQ 1 5 . 25  5  10  20  540 00  0 9 2 7 TE  Listing 755 756 757 758 759 760 76 ( 762 763 764 765 766 767 768 769 770 77 1 772 773 774 775 776 777 778 779 7 80 78 1 782 783 784 785 786 787 788 789 7 90 79( 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 8 10  8 1 t 8 12  o f GOOD a t ( 3 : 4 7 : 2 6 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1  MC82 -227 6 1 8 9 MC82 -227 6 189 MC82 -227 6 189 MC82 -228 6 190 MC82 - 2 2 8 6 1 9 0 MC82 - 2 2 8 6 1 9 0 MC82 - 2 2 8 6 190 MC8 2 -411 6 19 1 MC82 4 t t 6 19 1 MCB2 4 11 6 19 1 MC8 2 -4 11 6 19 1 MCB 2 -4 12 6 192 MC82 4 12 6 192 MC82 -4 12 6 192 MC8 2 -4 12 6 192 MC82 4 13 6 1 9 3 MCB 2 -4 13 6 193 MCB 2 -4 13 6 193 MCB 2 -4 13 6 193 MC82 -4 14 6 194 MC82 -4 14 6 194 MC82 -4 14 6 194 MC82 -4 14 6 194 MCB 2 -4 15 6 195 MC82 -4 15 6 195 MCB 2 -4 15 6 195 MC82 -4 15 6 195 MC8 2 -4 16 6 196 MC8 2 4 16 6 196 MCB 2 4 16 6 196 MCB 2 -4 16 6 196 MCB 2 4 17 6 (97 MCB 2 -4 17 6 (97 MC 8 2-4 17 6 197 MC82 -4 17 6 ( 9 7 MC8 2 4 18 6 198 MC82 - 4 IB 6 198 MC82 -4 IB 6 198 MC82 4 18 6 198 MC82 -4 19 6 199 MC8 2 - 4 19 6 199 MCB 2 -4 19 6 199 MCB 2 -4 19 6 199 MCB 2 -420 6 2 0 0 MCB 2 - 4 2 0 6 2 0 0 MC82 4 2 0 6 2 0 0 MC82 -420 6 2 0 0 MC82 -42 1 6 2 0 1 MC82 42 1 6 201 MC82 42 1 E 2 0 1 ML82 -42 1 6 2 0 1 MC82 -422 6 2 0 2 MC82 -422 6 2 0 2 MC8 2 4 2 2 6 2 0 2 MCB 2 4 2 2 6 2 0 2 MC82 4 2 3 6 2 0 3 MCB 2 -423 6 2 0 3 MC8 2 4 2 3 6 2 0 3  2  3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3  o n NOV GWAV  7,  ( 9 8 4 f o r CCId'KMMC  7 3  R 5492275 493845 GWAV 7 2  BL2 1  Page  1  BL2SL3 1  20 1  4 2 3 27  0 5493446 492060 AFTF 2E 174  5- 1 8 - I S A  D 5493446 492060 AFTF 2E 30  5- 1 8 - I S A 501 0G1 4 103  5  0 5493446 492060 ACTF 2D 46  5- 18-13A  0  D 5493446 492060 ACLT 2CD 30  5- 1 8 - I S A GY6 4  OGt  1  OGt  1  D 5 4 9 3 4 4 6 4 9 2 0 6 0 5- 18-13A GR 1 FEDK 6F 9 2 D  5493446 492060  OF T F  3E  6  14  4 3 3 32 28  IS  6128 5 10  0 9 3 7 TE 3 2 5 (0  1 0 1 824 0 3 1 4  1 0 2  4 6 3 0 0 4 6 4 5 0 7 6 0 TE 34 2 2 12 9 4 4 2 2 27 178 49 10  549 4 668  O  24 7 36 0 5  906  0  3 0  37  2 5 22  6  20  10  1 4 60  7  10  30  540  3 60  77  10  1 10  1640  1  too  1 4 50  6  IO  30  480  4 0 3 9  1 2 45  9  10  90  560  3 1 2 50  5  10  30  2 lOO  0 6 7 0 0 0 7 6 0 TE 23 6 1 9 7 4 3 4 3 3 68 10  1 2 18  0 7 3 B 0 0 7 6 0 TE 1 2 0 0 2 0 0 78 IO 9  0  ( 6  1 1 43 12  ( 3 8  1 2 60  3  10  30  1000  090B O 0 7 6 0 IE 4 2 2 12 79 0 2 1 12 10  1 1 43 13  2 5 5  1 2 55  3  IO  20  IOOO  105 4 5 0 7 6 0 TE 4 2 3 32 9 2 5 6 4 3 42 10  1 2 43 0 3 6 1  55  3  to  20  560  7 45  6  20  40  440  D 5493446 492060 SPSC 8G 194  5- 1 8 - I S A 13 17 5 1 3 1 9 5 0 7 6 0 TE BL2BR2 4 1 3 3 59 4 3 2 3 543 0 1 63 10 7 2 t  0 5493446 492060 ANLP 2C 77  5- 1 8 1 3 0 2 0 1 5 0 2 0 3 8 0 7 6 0 TE DG2 4 2 3 12 479 4 4 2 2 1 2 80 53  D 5493446 492060 ACTF 20 16  5- 1 8 - 1 3 0G2  0 5493446 492060 SOZS 8 68  5- I B - 1 3 BLS 1  . to  20  2 20  620  38 0 3 (5  D 5493446 492060 AFTF 2E 6 lOO  0446 0  10  0 5 5 0 .5 0 7 6 0 TE 4 2 3 2 9746 4 3 2 2 155 33 to  5- 1 8 - I S A 1154 0 1184 0 0 7 6 0 TE DG2 4 1 3 21 97 0 3 1 1 3 1 2 3 1 1 13 162 80 2 1  2  10  38 0 (7  5- I B - 1 3 A 1 0 5 2 GY6 1 4  1  5  13 0 9  D 5493446 492060 DCTF 3D 12  0348 0  2 .40  0 5 0 3 0 0 7 6 0 TE 4 2 2 2 4 16 0 3 2 2 107 30 38  5- 18 - 13A 8 2 0 0 0 8 2 2 0 0 7 6 0 IE BL3 4 2 2 2 6279 0 2 1 2 109 10  D 5 4 9 3 1 1 6 4 9 2 O 6 0 5- 18-13A DCTF 3D BLS 7 2  6  1  0 3 5 0 .0 0 7 6 0 T E 3 2 2 13 129 88 . 10  O3  0 4 4 8 0 0 7 6 0 TE 2 619 4 4 4 2 3 158 10  1 2 49  1 2 14  1  t  12  3 1  t  85  5  10  20  440  5  15  3  to  20  380  7 3 23  1 5 05  3  10  40  280  4 7 3 10  1 4 40  14  to  40  320  73 0 24  (73  Listing 8 13 814 8 15 8 16 8 17 8 18 8 19 820 82 1 822 823 824 825 826 827 828 829 8 30 83 1 832 833 834 835 836 837 838 839 840 84 1 842 843 8 14 845 846 847 848 849 850 B5 1 852 853 854 855 856 857 858 859 860 86 1 862 863 864 865 866 867 868 869 870  o f GOOD  at  13.47:26  4 MC8 2 - 4 2 3 1 MC8 2 -424 2 MC82 - 4 2 4 3 MC82 -424 4 MC82 -424 1 MC82 - 4 2 5 MC8 2 - 4 2 5 3 MC8 2 - 4 2 5 4 MC82 4 2 5 1 MC 8 2 -426 2 M L 8 2 426 J M L 8 2 426 4 MC8 2 - 4 2 6 1 MC82 -427 2 M L 8 2 427 427 3 ML B 4 M f 82 -427 1 M L 8 2 428 2 M L 8 2 428 3 MC 8 2 4 2 8 4 M L 8 2 428 1 M L 8 2 -429 2 ML82 -429 3 MC8 2 -429 4 M L 8 2 429 1 MC8 2 -4 30 2 M L B 2 43L> 3 M L B 2 430 4 M L 8 2 4 30 1 M f 8 2 43 1 2 M ' 8 2 43 1 3 ML 8 2 4 3 1 4 MC8 2 43 1 1 MC8 2 -432 2 MC8 2 4 3 2 3 MC8 2 -432 4 MC8 2 4 3 2 1 ML B 2 -433 2 MC82 4 3 3 3 ML'82 -433 4 MC82 4 3 3 1 ML 8 2 434 2 MC82 4 3 4 3 MC82 4 3 4 4 MC8 2 434 1 MC82 4 3 5 2 MC82 -435 3 MC82--435 4 MC82 4 3 5 1 MC82 4 3 6 2 MC8 2 4 3 6 3 MC82 4 3 6 4 MC82 4 3 6 1 MC 8 2 •4 3 7 2 MC82 4 3 7 3 MC8 2 4 3 7 4 MCB2 4 3 7 1 MC8 2 4 3 8  2  2  6203 6204 6204 6204 6204 6205 6205 6205 6205 6206 6 206 6206  O n NOV  7.  1984 f o r  Page  15  D 5493446 492060 SOZS a 52  5- 18- 13 0 4 6 1 5 0 4 6 3 5 0 7 6 0 TE 12 649 5 BL2 4 2 2 27 3 123 10  3  D 5493446 AFTF 2£  5- 1 8 - 1 3 GV6 4  5  492060 2 1  D 5493446 AFTF 2E  492060 22  6 206 6207 D 5493446 6 2 0 7 OF TF 30 6207 6207  492060 9  6208 0 5493446 492060 3D 6 208 OF TF 6208 6 6208 6209 0 5493446 492060 6209 SCCL 8C 6209 5400 6209 5493446 4 9 2060 62 10 • 20 62 10 A C I F 62 10 300 62 10 62 11 D 5 4 9 3 4 1 6 4 9 2 0 6 0 62 1 1 S P S C BG 62 1 I 22 62 11 62 12 0 5 4 9 3 4 10 4 9 2 0 2 7 30 62 12 DC T F 34 62 12 62 12 62 13 62 13 62 13 62 13 62 14 62 14 62 14 62 14 62 15 62 15 62 15 62 15 62 16 62 16 62 16 62 16 62 17 6217  CC i d = KMMC  0 5 5 8 .0 4 2 1  5- 18- 13 0 6 4 5 Gv 1 2 10  5  5- 1 8 - 1 3 FJL3 1  0 7 9 0 .0  5- 18-13 BL3 1  0 8 4 7 .5  5- t a - 1 3 0G2 1  0885  1  1 0  5  5- IB- 12 0 3 3 3 DG2BL2 2 5  0  D 5493410 492027 SPSC BG 89  5- 18-12 0 4 3 8 DG2BL2 1 1  O  D  5- 18- 12 0 4 8 5 GY6 1 1  0  5- 18-12 DG2 1  0568  0  5- 18-12 0G3 1  0625  5 4 9 3 4 10 4 9 2 0 2 7  SPSC  BG 2900  5493410 492027  SUZS  8 25  D 5493410 49202/ AFTF 2E 95 0 5493410 492027 AFTF 2E  62 17 62 17 62 IB D  122 5493446 492060  65  1 4 20  32  20  20  780  3 3 13  1 4 50  12  10  30  300  30  5  20  40  400  40  4  IO  20  1660  3  4 0  0 8 5 0 0 0 7 6 0 TE 4 2 3 12 619 1 165 10  3  2 1 14  1 3 20  13  1 0 1 30  23  1 3 8  43  0 2 9 5 0 0 7 5 5 TE 4 2 3 2 7 4 5 1 13 10  3 3 27  43  0 3 7 3 0 0 7 5 5 TE 4 2 3 32 6 2 9 7 5 74 1 OO  1 3 8  143  3  3  0 4 4 0 0 0 7 5 5 TE 4 2 3 32 S I 9 7 5 3 72 10 0 4 8 7 0 0 7 5 5 TE 4 2 3 32 759 4 93 . 10  5  0 5 7 0 . 0 0 7 5 5 TE 12 74 4 4 2 3 442 . 10  3  0627 0 0755 IE 2 2 12 598 0 228 10 0 6 3 0 0 0 7 6 0 TE  2  3  43  9  1 3 7  2 3 42  1 0 2 4 1  2  3  1  7  34  0 9 3 O 0 0 7 6 0 TE 4 2 1 2 4 O 3 205 1 70  1  a  1 2 13  24  5- 18-138 I 6 2 8 0  48  3  0 7 9 2 0 0 7 6 0 TE 2 6197 4 4 2 2 125 10  0  57  3 3 3 1  17  4 2 3  5 - 18 13 1 149 O 115 1 0 0 7 6 0 TE 3 549 5 BL2DG2 4 2 2 1 75 3 10  0  43  0 6 4 7 5 0 7 6 0 TE 1 74 4 4 3 2 4 2 15 43 IO  5- 1 8 1 3 103 1 0 1 0 3 3 0 0 7 6 0 TE DG1GG2 4 2 3 2 8 0 1 1 3 238 10  5- 18 12 0 2 9 3 GI6 1 12  D  0 5 6 0 0 0 7 6 0 TE 12 4 4 2 2 123 10  2 2 35  43  2  2 3 7  1 3 05  7  10  20  460  2 3 13  1 3 60  9  10  50  560  0 3 23  1 6 OO  5  10  20  440  0 3 2  1 7  to  20  340  6 3 18  1 2  15  5  20  60  320  2 6 6  1 00  4  20  SO  420  O 3 3  I 2 90  16  10  20  460  1 85  3  10  20  240  1 80  2  0 2  3 6 3 23  1 6  15  6  20  20  2450  6 3 22  1 5  15  7  20  20  1 120  23  Listing  o f GOOD a t 1 3 : 4 7 : 2 6  87 1 872 873 874 875 876 877 878 879  2 3 4 1 2 3 4  8 8 0  3  88  1  1  2 4  1  882 883 B84  2  8 8 5  4  886  1  887 888 889 890 89 I 892 893 894 B95 896 897 89B 899 9o0 90 1 902 903 904 905 906 907 90S 909 9 10 91 1 9 12 913 914 9 15 916 9 17 9 18 9 19 920 92 1 922 923 924 925 926 927 928  3  2  3 4  1 2 3 4 1 2  3 4 1  2  3 4  1 2 3  4 1 2  3  4  1  2  3 4 1 2 3 4 1 2 3 4 I 2 3 4  1 2  3  MC82 -438 MC82 -438 MC82 - 4 3 8 MC82 - 4 3 9 ML 82 - 4 3 9 MC82 - 4 3 9 MCB2 - 4 3 9 MC82 - 4 4 0 MC8 2 - 4 4 0 MC82 - 4 4 0 MC8 2 -440 MC8 2 44 1 M L 8 2 -44 1 MC8 2 44 1 MC8 2 •14 1 MC82 -442 MC B 2 -442 MC82 -442 MCB2 -442 MCB2 - 4 4 3 MC8 2 - 4 4 3 M L B 2 -443 Mf 8 2 4 4 3 M f B2 -444 M C B ? 444 M L 8.' 444 M L 8 2- 4 4 4 MC 8 2 4 4 5 ML 8 2 - 4 4 5 MC82 - 4 4 5 MC82 - 4 4 5 Mf 8 2 446 M ( 8 2-446 MC 82 -446 MCB2 -446 MC8 2 -447 MC82 -447 MC82 -447 MC B 2 -447 MC82 -0 1 1 MC8 2 -01 1 MC82 01 1 MC82 -01 1 MC82 0 1 0 MC82 0 1 0 MC82 0 1 0 MC82 0 1 0 MCB2 - 0 0 9 MC82 - 0 0 9 MC82 0 0 9 MC8 2 - 0 0 9 MC82 0 1 2 MC82 0 1 2 MC82 -012 MC82 0 1 2 M( 8 2 -013 ML 8 2 0 13 ML B 2 0 1 3  62 18 6218 6218 6219 6219 62 19 62 19 6 2 20 6220 6220 6220 6221 622 1 622 1 622 1 6222 6222 6222 6222 6223 6223 6223 6223 6224 6224 6224 6224 6225 6225 6225 6225 6226 6226 6226 6226 6227 6227 6227 6227 6228 6228 6228 6228 6229 6229 6229 6229 6230 6230 6230 62 30 623 1 623 1 623 1 623 1 6232 6232 6232  o n NOV ACTF  7,  1984 f o r CCId-KMMC  2D  DG4BL3 47  2  35  Paga  16  4 2 2 285  12  174 4 3 2 2 30 43  53  D 5493446 492060 ACTF 30 13  5- 1 8 - 1 3 B 8 0 5 . 5 0 8 0 7 .0 0 7 6 0 TE 4 2 3 2 6297 4 3 BL 3 2 8 120 10  1 2 18  0 5493446 492O60 DCTF 3D 10  5- 1 8 - 1 3 8 9 3 3 5 0 9 5 5 0 0 7 6 0 TE BL3DG4 4 2 3 2 54 4 3 153 2 2 10  1 2 348 18  D 5 4 9 3 4 4 6 4 9 2 0 6 0 5- 1 8 - 1 3 B 1 0 6 8 DCLP 3CD GR 1 1 10 2 9  0  0 5493446 492060 DCLP 3CD 26  5- 1 8 - 1 3 B 1 1 2 3 BL 3 3 3  0  D 5493446 492060 DCTF 3D 250  5-  18-I3B1178 BL2DG2 3 2  0  1070 0 0 7 6 0 TE 4 2 3 32 6 5 4 9 4 2 O 2 3 4 5 80 30 13 1 125 0 0 7 6 0 TE 4 2 3 12 6 4 7 9 4 138 . 10  3  2  1  1 180 0 0 7 6 0 T E 4 2 3 32 657 4 4 3 3 843 57 10 8  1 8 - 1 3 8 1224 0 1226 O 0 7 6 0 TE GR1VW2 2 81 0 1 0 2 2 2 2 1 12 160 10 25  D 5493446 492060 SCCL 8C 29  5-  18- I 3 B 1 3 2 3 0 1325 74 2 DG2 1 1 358  0 5493446 492060 SCCL BC 30O0  5-  18-13B1405 0G2 1 10  0  D 5493446 492O60 SPSC 8G 7 1  5- I B - 1 3 B 1 5 2 5 DG2BL2 2 1  0  R 5496245 491595 ABTF 2B 5 1 R  R 5495915 490975 ACLI 2CD 4 1  0 7 6 0 TE 1 4 4 2 I 2 10 56  1527 0 0 7 6 0 TE 4 2 2 23 9 5 3 58 10  1  DG2GG4 3  60  4 64 1  2 3 4 1  BK1 2 17 OB 0G2 2  DG2 2  4 3 16 9 (1 1 1 7  4 2  12 34 2  3  12  10  70  360  1 3 9  1 2 85  4  10  20  1500  1 3 7  1 2 B5  IS  10  30  400  5  10  50  460  23  IO  30  220  70  4  10  30  460  5 65  25  10  20  660  1 a 95  5  10  30  300  2 3 16  1 6 65  10  10  40  60  2 3 5  1  1 90  3  10  20  480  20  4 70  3  20  20  800  0 16  4 55  4  10  10  340  1 90 1 63  6 17  10 20  10  1 3 .90  6  10  30  160  LQ  3  10  IO  200  00 UT  0  3  1  5  1 3 B  2  1 2 . 50  0  1  3  3 6 3 20  13  PH 1 3 134 8  20  TE 1  .20  0 8 0 5 TE 3 4 0 0 0 2 4 1 50  3 52  0 7 9 8 TE ME 23 17 0 0 20 .92 7 21 0 8 3 4 TE 23 6 8 4 5 0 0 40  0 64  0 8 5 3 TE 123 6 9 5 2 5 30  1 2 35  1 4 80  27 0 27  1407 .0 0 7 6 0 TE PH 4 2 1 94 1 4 3 1 3 298 1 40 35  5496235 491525  45 52 28 R 5495995 491200 ACLT 2C0 1 18  0  0809 2  43  10  D 5493446 4 92060 5 DCFL 3A 1 18  R 5 4 9 6 2 5 0 4 9 1 6 10 AFTF 2E 26  143  1 3 23  34  6380 0 I 2 0 33 1 1 9 18 0 2 59  1 0 2 48  123 0 2 39  34  0 26  5  10  200 98  PJ 0>  Listing 929 930 931 932 933 934 93S 936 937 936 939 940 94 1 942 943 944 945 946 947 948 949 950 95 1 952 953 954 955 956 957 958 959 960 96 1 962 96 3 964 965 966 967 968 969 970 97 1 972 973 974 975 976 977 978 979 980 98 1 982 98 3 984 985 986  o f GOOD a t  13:47:26  4 MC82 - 0 1 3 1 MC82 -014 2 MC82 - 0 1 4 3 MC82 0 1 4 4 MC82 - 0 1 4 1 MC82 - 0 1 9 2 MC8 2 - 0 1 9 3 MC82 0 1 9 4 MC82 - 0 1 9 1 MC82 0 1 8 2 MC82 0 1 8 3 MC82 - 0 1 8 4 MCB2 -018 1 MC82 -015 2 MC82 - 0 1 5 3 MC82 - 0 1 5 4 MC82 0 1 5 1 MC82 -017 2 MC8 2 -017 3 MC82 -017 4 MCB 2 0 1 7 1 MC8 2 -0 16 2 MC82 - 0 1 6 3 MC82 0 1 6 4 MC82 -016 1 MCB 2 -O20 2 MCB 2 -O20 3 MC 8 2 0 2 0 4 MC B 2 - 0 2 0 1 M C 8 2 02 1 2 MCB 2 0 2 1 3 MC8 2 02 1 4 MC82 02 1 1 MC8 2 • 0 2 2 2 MCB 2 0 2 2 3 MCB 2 -022 4 MCB 2 0 2 2 1 MCB 2 0 2 3 2 MC82 - 0 2 3 3 MCB2 0 2 3 4 MC82 - 0 2 3 1 MCB 2 -024 2 MCB 2 0 2 4 3 MC82 0 2 4 4 MCB 2 -024 1 MC82 - 0 2 5 2 MCB 2 - 0 2 5 3 MCB 2 - 0 2 5 4 MC8 2 - 0 2 5 1 MC82 -026 2 MC8 2 - 0 2 6 3 MC8 2 0 2 6 4 MC82 -026 1 MC82 -027 2 MCB 2 -027 3 MC8 2 0 2 7 4 Mc8 2 -027 1 Mi 8 2 0 2 8  6232 6233 6233 6233 6233 6234 6234 6234 6234 6235 6235 6235 6235 6236 6236 6236 6236 6237 6237 6237 6237 6238 6238 6238 623B 6239 6239 6239 6239 6240 6240 6240 6240 624 1 624 1 624 1 624 1 6242 6242 6242 6242 6243 6243 6243 6243 6244 6244 6244 6244 6245 6245 6245 6245 6246 6246 6246 6246 624 7  o n NOV  7.  1964 f o r CClO=KMMC P a g e  R 5495885 490895 MCHI 5C 43 R 5495840 490445 BSPL 1A 24 5 0 12 R 5495840 490485 ACL I 2CD 20 R 5495830 490620 BSLT 1 48 47 48 R 5495830 490480 ACTF 2D 50  0865 GY3 1  BK 1 1 17 25 DG2 1  3 1  GR 1 2  I  23 6  R 5495780 490220 MARG 5A 32  DG2 1  7  R 5495550 489880 MTFT 5T 85 R  5 4 9 5 5 10 4 8 9 8 4 0  4  1  3  R 5495555 489900 MIFF 5T 107  lOO  GGIDG2 1 4 2 1 16 79 10 47  R 5 4 9 5 8 3 0 4904 30 MARG 5A 44  R 5495555 489915 DCLP 3C 24  1  123  TE  1 3 75  1  2  2 80  3  13  0  23  3  1  S 35  1  t  4  22 58  TE ME  TS  2  7 2 0 1 15  3  10  20  460  9 35  20 22  20 3 25  380  1 1  10  to  640  10 18  10 4 42  63812236 6 55 1 78  3 2 73  6 55  2  10  10  800  3 25  3  10  20  60  6382 9 0 1 0 2 724 7 0 30 4B 20  0895 BK 1  46  12 129 0 1 0 1 432 7 0 87 34 20 95 8 27 5 76 0 B 8 8 TE 6383 2 9 0 1 0 2 724 7 0 20 58 32 0883  GR  2 0  19 30  0880  3  R 5495565 489940 MIFF 5T 26  7  63842234 0 8 9 2 TE ME TS 37 O 3 3 1 1 2 3 9 O 1 O 1 1 24 75 5 10 50 10 9 93 1 OS 6 31 4 16 6 10 0 8 8 7 TE 32 6 5 9 4 1 1 2 1 3 74 2 2 3 0 1 1 9 145 23 3 70 . 10  R 5495820 490560 ACTF 20 47  R 5495775 490180 DCLP 3C DA CA 14 6 1 92 R 5495695 490045 DCLP 3C 49  17  lOOO  TE  TE  60  0  2  1 2 40  1 0 14  4  15  7  10  20  360  0  2  1 2 19  1 0 6  3 90  24  10  30  840  1 3 20 3 16  4 2 99  10 23  30 3 07  760  0 9 1 0 TE 1  7 2  0 87  90 0913  CA  GR1BL1 2  19 98 GR2 2  3  GY6  6349 TS 3 4 1 3 32 4 5 2 1 3 t 1 3 6 4 3 1 3 1 85 13 2 20 1 22 1 48 97 4 59 0 9 3 0 TE 4 2 3 3 43 0 3 32 6 1 7 4 5 2 0 2 1 25 85 SO 38  0G1SL3  6 GY 3  2  22  0 9 5 2 TE  2  7  3  0 9 5 3 TE 4 2 3 432 6 1 2 4 5 3 BO 170  30  6  20 109  7  t  2  1 128  0G4  84 1  7  1 1 85  O  1 60  0955  1  90  0955 2  TE ME  2  TE  2  5  TE  19 5 1 OO  0960  2 1  3  14  22  14  4  3  2 1 2 4  2  TE ME  1 2 5  1 3 3  0  3  3  4 0 3 23  3  2 5 2 1  1  6  40  9  IO  30  7 BO  1 1 80  29  10  140  940  30  22  10  220  1 160  1 7 70  25  10  40  1  2  500  1  6  &)  cQ fD 25  25  10  30  300 00  Listing 98 7 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 IO07 IO0B 1O09 1010 101 1 1012 1013 1014 1015 1016 1017 1018 1019 1O20 102 1 1022 1023 1024 1025 1026 1027 1028 1029 1030 103 1 1032 1033 1034 1035 1036 1037 1038 1039 1040 104 1 1042 1043 1044  o f GOOD a t 13 47 2 6 o n NOV 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2  3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3  MC82 -028 MC82 -02B MC82 -028 MC82 - 2 2 9 MC82 - 2 2 9 MC82 - 2 2 9 MC82 - 2 2 9 HCB2 - 2 3 0 MCB2 -2 30 HC82 -230 MCB 2 - 2 3 0 MC82 - 2 3 3 MC82 - 2 3 3 MC82 - 2 3 3 MC82 - 2 3 3 MC82 -231 MC82 231 MC82 -231 MC82 -231 MC82 -241 MC82 - 2 4 1 MC82 -24 1 MC8 2 -24 1 MC82 - 2 4 0 MC82 - 2 4 0 MC82 - 2 4 0 MC82 - 2 4 0 MC82 -242 MC82 -242 MC82 -242 MC82 -242 MC82 2 3 9 MC82 2 3 9 MCB 2 - 2 3 9 MC8 2 - 2 3 9 MC82 -232 MC82 232 MCB 2 2 3 2 MCB 2 2 3 2 MC82 -238 MCB 2 238 MC82 -238 MC82 -238 MC82 - 2 4 3 MC82 - 2 4 3 MC82 - 2 4 3 MC82 - 2 4 3 MC82 - 2 4 4 MCB 2 - 2 4 4 MC82 -244 MC82 -244 MCB 2 - 2 4 5 MC82 - 2 4 5 MC82 - 3 4 5 MCB 2 - 2 4 5 MC82 -247 MC82 -247 MC82 247  6247 6247 6247 6248 6248 6248 6248 6249 6249 6249 6249 6250 6250 6250 6250 625 1 62S 1 625 1 6251 6252 6252 6253 6252 6353 6253 6353 6253 6254 6254 6254 6254 6255 6255 6255 6255 6256 6256 6256 6256 6257 6257 6257 6257 6358 6258 6258 6358 6359 6359 6259 6259 6360 6360 6260 6260 626 1 626 1 626 1  MARG  7.  1984 f o r C C I d - K M M C BK 1  5A  39 65 72 R 5495505 490O50 MARG 5A 47  2 15 . 74 BK 1 2  R 5495387 4901B3 DCLP 3C 15 R  3  2  7 2  1  1  4 BO 10  2  1 07 14 0 3 1 1  .30  GY 1 1 17 3 9 GY 3 2 16 39 BK 1 1  1 3 35  15  1 3 58  1 O 18  1171 TE 1 3 32 6972 0 2 23 10  1 2 4  34 0 3 3  3  GG40G2 15  12  TE ME 28 0 0 2 4 6 2 2 12 1 103 10 6 67 7 1 3 01 1055 TE ME 23 4 1 3 32 124 5 3 2 37 10 48 3 67 3 18 1185 TE 1 7 2 1 O 0 12 1 44 10  4  5  5 1 77  IO 10  20 3 33  12  10  20  1740  3  10  20  1060  2 BO  10 13  20 2 55  320  2 117  10 09  30 3 05  820  2  660  5  10  TS 1 1 8  639122SO 124 1 0 4 10 10 2 44 3 . 93 63472251 TS 14 1 3 3 2 2 1 1 1 80 2 07 2 80  4 20  5  10  20  480  1 60  10  10  20  760  1 80  5  10  20  520  1 95  9  20  20  160  2  OO  3  10  30  1 lOO  3 40 4 21  2 05  10 16  20 1 93  260  2 90  3  10  30  340  10 18  IO 2 33  920  1  10  10  460  3  10  10  440  1  1187 TE 1  1  25  8  3 67 1  R 5495345 490050 DCLP 3C 6  4  5  R 5 4 9 5 150 4 9 0 4 4 0 ACTF 2D 18  1 2 1  1 0 70  72 1 93 1043 TE 0 0 0 3 1 1 43 30  73  R 5495360 490185 MCHT 5C 5  R 5495288 490260 DF TF 3DE AN CA 4 62 0 7 R 5 4 9 5 2 18 4 9 0 3 1 0 ANLP 2C 52  0 35  1 3 30  1105  5495375 490217 5 1 1  R 5495335 490205 DCFL 3A 9 64 17 R 5495315 490235 OCLT 3CD 4  18  1 0 65  1043 TE  R 5495490 490040 DCTF 3D 75 R 5495443 490097 OFBC 3A 5 6 0 92 R 5 4 9 5 4 18 4 9 O O 0 8 DCTF 3D 4 67 15 R 5495398 490210 MARG 5A 4  Page  32 7 1 6 13  0G2  1 0 24  10  10  1169 TE 0 0 0 2 0 3 24 10  3  1 6 3 5  1  1075 TE  GY 1 1 16 4 5 GR 1 1  60  5  1  2257 1173 TE ME TS 528 5 2 1 1 12 0 3 6 9 . 10 3 04 68 2.15 1182 TE 4 2 3 32 8 6 1 9 0 1 0 2 234 0 IO 2 6 40  3 4 2 2 1 48 5 66 6 1  20  2  1  1185  CA  GY 1 1 16 6 2  6 2 1 6 41  GR 1  1 2 53  2  1  3 58  GR2 1  3 1  4 2 3 33 38  1  4 2  TE ME TS 63992259 2 78 1 t 0 3 2 0 . IO 3 9 3 90 7 1 3 03 3 57 3 95 1187 TE 3 2546 0 3 0 2 34 0 17 22 3 90 10 1345 TE 9456 5 1 .30  t 3 234 O 3 3 13  4 .40  (D  1 3  80  LQ  fD  co  Listing  o f GOOD a t 13 47 2 6 o n NOV  1045 1046 1047 1048 1049 1050 105 1 1052 1053 1054 1055 1056 1057 1058 1059  4 1 2 3 4 1 2 3 4 1  107 1  2  1072 1073 1074 1075 1076  3 4 1 2 3  1077  4  MC82 -247 MC82 -234 MC82 -234 H C 8 2 -234 MC82 -234 MC82 2 3 7 MC82 -237 MC82 -237 MC82 -237 MC82 -248 MC82 -248 MC82 - 248 MC82 2 4 8 M C 8 2 235 M C 8 2 235 MC8 2 -235 MC82 235 M C 8 2 2 36 M L 8 2 -236 MLB 2 - 236 M L 8 2 -236 MC8 2 2 4 9 M L 8 2 - 249 MC82 -249 ML' 8 2 249 MC82 - 2 5 0 M L B 2 - 2 50 MC8 2 - 2 5 0 MC82 2 5 0 M L 8 2 246 MC8 2 -246 Ml 8 2 246 M< 8 2 246  1060  3  106 1  4  1078 1079 1080 10B 1 1082 108 3 1084 1085 1086 1087 1088 1089 1090 109 1 1092 1093 1094 1095 1096 1097 1098 1099 i too 1 101 1 102  1  M.  8 2  25 1  2  ML 8 2  25 1  106 2  1063 1064 1065 1066 106 7 1068 1069 1070  2  3  4 1 2  1 2  3  4 1 2  3  4 1  3 Ml 82 1 M( 8 2 1 2  3 4 1 2  3 4 1 2 3 4 1 2 3 4 1 2 3 4 1  25 1 25 1 M L H 2 253 M L B 2 253 M C 8 2 - 253 M L 8 2 253 MC8 2 252 MCB2 -252 M L 8 2 - 252 MC82 -252 MC82 - 254 MC 8 2 - 254 M L 8 2 -254 MC B 2 -254 MC82 - 255 MC82 - 2 5 5 MC82 -255 MC82 - 2 5 5 MC82 -256 MC82 - 256 MC82 - 256 MC8 2 -256 Mf 8 2 -257  626 1 6262 6262 6262 6262 6263 6263 6263 6263 6264 6264 6264 6264 6265 6265 6265 6265 6266 6266 6266 6266 6267 6267 6267 6267 6268 626B 6268 626B 6269 6269 6269 6269 6270 6270 6270 6270 627 1 627 1 627 1 627 1 6272 6272 6272 6272 6273 6273 6273 6273 6274 6274 6274 6274 6275 6275 6275 6275 6276  1984  f o rCCld«KMMC  R 5495158 490203 ACTF 20 27  1124 DG1 1  R 5495154 490227 ACTF 2D 46  2  R 5495145 490459 MTFF 5T 71  5  R 5495135 490180 SOZS 8 88 72 6 9 R 5495125 490175 SCCL 8C 745 42! 8 6 R 5495080 490540 MARG 5A 42 1  R 5495026 490562 AFTF 2E 43 R 5495007 490435 ACTF 2D 38  5  1136 TE 4 2 3 32 6129 0 2 0 1 275 23 60  3  2  34  0 2 16  3 7 25  4  10  20  1500  34 0 3 16  1 6 65  9  10  30  2 100  4 0 3 16  1 3 00  5  10  50  720  1 75 1 4 1  7  10 04  20 3 27  4 20  3 80  4 30 1 38  16 4 39  10  30 9 37  980  1 2 80  7  10  40  BOO  10  40  100  24  10  30  1560  120  1253 TE 3 74  1 1 62  1 40  4 3 2 2 13  1084  BL 2 3 14  10 BL 3 2  20 73 BK 1 2  TE ME TS 5 5 3 1 3 4 16 O 3 1 1 .46 2 7 1 09 1084 TE ME TS 635 1 34 14 1 3 32 34 0 0 5 5 3 1 3 1 38 SO 640 .60 7 12 7 37 69 5 86 1268 TE 7 1 0 0 3 O 0 3 1 1 1 0 3 1 54 14 128 40  23 13 2 1 5 50 2 .139  GR 1  3  4  1  2  GR 1 2  3  R 5494990 490556 SOZS 8 46  BL2SL3 4  R 5494877 490505 SOZS 8 46  5  5 4 9 4 145 4 9 3 2 7 0  3  2  R 5494996 490515 SCCL 8C 58  R  TE ME 57 0 1 2 3 .60 30  4 2 3 315  BL 2  3  R 5 4 9 4 140 4 9 3 2 3 5 DBLT 3BC 1  3  DG2  ft 549t>0G6 4 9 0 5 6 9 AFTF 2E 50  R 5 4 9 4 109 4 9 3 2 4 4 DF TF 3E 1  Page  DG4  3 1  4  3  3  G< 1 30  3 1  4  3  4  SL3GG2 36  60  1279 TE 1 0 12 4 0 1 0 2 234 63 4 20  4 3 24  1  1245 TE 2 19 0 1 0 2 2 3 4 5 10  2 3 4  1 3 25  4 3 3 130  3 1  12  1 2 103  1275 TE 2 289 4 3 50  1 2 228  2  1 2 43  2  1 2 58  12  1 2 4  6 70  1  1  15  34 0 3 28  1  7 90  32  10  60  1282 TE 9 5 4 2 3 1 50 22  34  0 3 14  1 4 60  46  IO  200  1279 TE 12 3 3 2 2 8 50  34  0 3 14  1 2 85  15  20  70  760  1267 TE 129 3 3 2 2 1 20  43  0 3 1  1 1 30  23  10  40  40O  1 50  14  10  30  1 100  1 too  1 2 3 0 TE GY6 3  23  8  4 2  0 23  1  1  1 0 0 10  1  24  13  . 10 1245 TE  0 1  1  PJ  cQ  PH  1 2 5 0 TE 3  14 0  ft)  1  1. 60  36  40  SO  t020  oo 00  Listing 103 104 105  toe  107 108 109 1 10 I t 1 1 12 1 1 3 1 14 1 15 1 16 I 17 t 18 1 19 120 12 1 122 123 124 125 126 127 128 129 1 30 1 3 1 132 133 1 J J 135 1 J6 137 1 38 139 1 40 14 1 142 143 144 145 146 147 148 149 150 15 1 152 153 154 155 156 157 158 159 160  o f GOOD a t 1 3 : 4 7 : 2 6 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  1 2 3 4 t 2 3 4 1 2 3 4 1 2  3 4 1  2  3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3  MC82 - 2 5 7 MC82 - 2 5 7 MC82 - 2 5 7 HC82 -258 MC82 - 2 5 8 MC62 - 2 5 8 MC82 - 2 5 8 MC82 - 2 5 9 MC82 - 2 5 9 MC82 - 2 5 9 MC82 -259 MC82 2 6 0 MC82 2 6 0 MC82 - 2 6 0 MC8 2 - 2 6 0 HC82 -26 1 MC82 26 1 MC8 2 -26 1 MC8 2 -26 1 Mr 8 2 -262 MC82 - 262 MC8 2 - 262 M C 8 2 -262 MC82 - 263 MC 8 2 - 2 6 3 MC8 2 -263 M r e 2 263 M i 8 2 - 264 M C 8 2 264 M r 8 2 264 M ' 8 2 264 M l 8 2 265 M. 8 2 265 Ml 8 2 265 M( 8 2 2 6 5 ML 8 2 266 Mr 8 2 - 2 6 6 ML 8 2 2 6 6 MCS2 2 6 6 MC8 2 -267 MC82 -267 MC 82 267 MCB2 -267 ML 8 2 -268 MC82 -268 MC82 - 2 6 8 MC8 2 -268 MC82 - 2 6 9 MCB2 - 2 6 9 MC82 - 2 6 9 MC82 - 2 6 9 MC8 2 - 2 7 0 MC82 - 2 7 0 MC82 - 2 7 0 MC82 - 2 7 0 MC82 -27 1 MCB2 -271 MC8 2 -27 1  6276 6276 6276 6277 6277 6277 6277 6278 6278 6278 6278 6279 6279 6279 6279 6280 62BO 6280 6280 628 1 628 1 628 1 628 1 6282 6282 6282 6282 6283 6283 6283 62B3 6284 62B4 62B4 6284 6285 62B5 62B5 6285 6286 6286 6286 6286 6287 6287 6287 6287 6288 6288 6288 6288 6289 6289 6289 6289 6290 6290 6290  o n NOV DCTF  7,  1984 f o r C C i d - K M M C  30 1  2  R 3 4 9 4 17 1 4 9 3 3 2 0 MCHT 5C 28 R 5494219 MCHT 5C  2  23 2 15 1 75  1 3 40  2  1  1 0 104  7  1 0 95  3  3  7  3  13  83 78  7  13  10  1 0 123  3  4  1 0 510O  83  1 2 170  30  1 75  1 1  10  20  5 14  20 02  30  780  1 05 4 75  1 0 8  4 OO  35  10  10  940  1 1 2 5 1  1 0 0 13  3 55  12  10  10  920  1 1 2 42  1 0 0 1 3  3 70  10  10  20  960  1 45  63  BO  I3O0  1BOO  1 4 . 40  48  2400  220  660  3 60  38  150  530  2O0  43 O 3 17  I 4 40  155  120  290  1 160  34  1 3 25  175  200  170  860  1 2 44  1  1025 TE PH 0 0 5 3 2 3 431 0 3 1 7 3 30  325  10000  1060 TE 14 2 70  12  3 43 165  6  GR 1 9  3  4  57  1 2 3850  1 2 280  3  3  PH 1 3 14 2 2 3 9  1 2  1060 69  t  PH  50  t  2  0 9 8 8 TE 2 19 5 4 2 2 2 70 15 0 9 8 8 TE 2 19 4 4 3 50  2 2 5  1 3 7  1088  BK 1 4 15 38  3 47 37 7 48  1 2 240  4  1 1 255  GR 1  3 87  9  TE ME T S 12 4 5 3 1 0 0 4 3.80 28 19 99 4.73 1 38 1108 TE PH 2 19 4 4 2 2 43 0 3 1 1 14 2 . 40  49003 1  1108 TE 3  BL 3 4  38  3  BL2 7  1 4 0 2 10  4  3  1  3  DG3 2  SO  4  3  30  1 3 65 64  SO 23  90 6 79  63  50  50  900  4 1  50  30  1800  05  4  10  40  1560  1 7 35  12  20  30  700  3  170 12  1460  1 5  20  PH 0 5 3 3 18  3  43 0 9  1 2 23 82  1084 TE PH 1249 3 3 2 2 43 2 60 1  2 3 23 300  120O TE 2 4 9 0 2 O 2 129 0 3 22 21 50  490327 128  1  TS P H 0 2 64 0 3 1 1 114  0 9 6 2 TE 2 1  GR 1  R 5495067 490122 SPSC 8G 5100  2 243 0 3 1  1 2 8 0 TE  490O72  585  R 5495045 ACIF 20  3 4  489760  R 5 4 9 5 152 4 8 9 9 4 4 AFTF 20 147 57 6 9 R 5495124 490O04 SCCL BC 86 R 5495075 SOZS 8  BK 1 3  BL3  R 5495275 49OO90 SOZS 8 3050  1  TE ME 17 0 1 IO 19 2 1 1 2 6 0 TE 1 . 10  489545  865  5 1 0  1 2 5 0 TE  BK 1  30O0 R 5495293 SuZS B  7  22  489597  385 5495250  2456 . 10 1257  BK 1  30 R 5495287 MSSV 3D  20  3 43  493322 40  R 5495339 MIFF SI  Page 4 2  10  R 5 4 9 4 157 4 9 3 2 7 2 RYLT 4A RV CA CA SL 1 1 9 76 8 9 12 9 3 R 5494164 493279 MCHT 5C BR t 24 2  R  3  GV 1  1 3 1  1 2 OO  pj  1  2  LQ  00 LD  Listing 16 1 162  163 164 16S 166 167 168  169  170 1 7 1 172 173 174 175 176 177 178 1 179 1 180 I 18 1  of  GOOD a t 4 1 2 3 4 1 2 3 4 1 2 3 4  1  1 1 189  2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  1  1  1 1 1 1 1 1  182 183 184 185 186 187  188  190 119 1  1  192 1193 1 194  1  195 1 196 1 197  1  198 1 199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 12 10 12 11 12 12 12 13 12 14 1215 12 16 12 17 12 18  2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1  on NOV  13:47:26  MC82 -271 MC82 -272 MCB 2 -272 MC82 -272 MC82 -272 MCS2 - 2 7 3 MC82 - 2 7 3 MC82 - 2 7 3 MC82 - 2 7 3 MC82 -274 MC82 -274 Ml 8 2-274 MC8 2 -274 MC82 - 2 7 5 MCB 2 - 2 7 5 MC82 -275 MC82 275 MC82 -276 MCB 2 -276 MC8 2 -276 MC82 -276 MC8 2 277 MC82 -277 MC82 -277 MC8 2 -277 MCB 2 -278 MC82 -278 MCB 2 2 7 8 MCB 2 -278 MCB 2 2 7 9 MCB 2 - 2 7 9 MCB 2 -279 MC8 2 - 2 7 9 MC82 - 2 8 0 MC82 - 2 8 0 MC82 - 2 8 0 MC82 - 2 8 0 MCB 2 -28 1 MCB 2 281 MC8 2 -281 MCB 2 -281 MC82 - 282 MC82 282 MC82 -282 MC82 -282 MC82 - 2 8 3 MC82 - 2 8 3 MC82 - 2 8 3 MC82 - 2 8 3 MC82 -284 MCB 2 -284 MC82 -284 MC82 -284 MC82 3 1 0 MC82 -3 10 MC82 3 10 MC82 - 3 1 0 MC82 - 3 0 9  6290 S291 6291  629 1 6291 6292 6292 6292 6292 6293 6293 6293 6293 6294 6294 6294 6294 6295 6295 6295 6295 6296 6296 6296 6296 6297 6297 6297 6297 6298 6298 6298 6298 6299 6299 6299 6299 6300 6300 63O0 6300 6301 6301 6301 6301 6302 6302 6302 6302 6303 6303 6303 6 303 6 304 6304 6 304 6304 6305  R  7,  1984 for  CCId=KMMC  21  5495065 490280 285  R 549505O 490240 RVLT 4 44 R 5494982 490220 SPSC 8G 17 8 3 04 R 5494830 490270 SPSC 8G 2 150 83 OO R 5494758 490316 SPSC 8G 2250 R 5 4 9 4 145 4 9 1 3 3 5 DCLT 3C0 2 1 R 5 4 9 4 188 4 9 1 3 7 0 DCTF 3D 23  1205 TE 16  158  BL2 10  3 445  BL2 8  10 DG1GG3 3  6  85  2  3 4 22 3 78  DG1GG4 38 10  4  t 1 4 5 TE ME 1 2 23 29 3 3 53 30 25 1 49 1208 TE ME 1 2 32 9 3 4 80 1 50 .23 1 82 1 1 9 0 TE 9 3 4 1 2 23 1 13 80  4  DG2 3  4 2  4  DG4  3 1  2  DG4 1  1  DG4  3  3 23 70  R 5 4 9 3 9 7 5 4 9 1 4 30 ACTF 2D 13 69 53 R 5494565 490792 SQ2S 8 77 490790  6274 10  120  30  1OOO0  1 90  27  60  40  620  9 IB  20 02  20 2 11  540  10  20 02  20 2 38  500  12  30  30  280  1  3 1  134  2 5 25 1 1 55 08 45  2  TS 2 3 346 PH  1  2 5 32 1 2 . 10 1 1 87  2 3 1  34  0 1 0 1 3  3  2 3 24 1 1 BO  1 53  1  GG4DG2 2  3 1  1  GR2  1  GR 1 2 14 8 0 SL3  8  1  23 1 12  90  2  IO  30  680  70  3  IO  40  700  18  3  10  30  780  34 0 3 7  1 2  4 2 2 65  0 9 7 7 TE 2 279 0 10  0 0 1 1  34  1  4 2  2  1023 TE 279 0 10  0 0 1 1  34 0 3 5  1 2 65  3  10  20  780  1 2 1  32 0 3 10  1 4 48  7  10  20  840  3 67  10  10  20  680  1 98  2  10  20  1300  10 07  30  2 60  4 2  4 4  2  2  3 32 80  3 32  88  3  55  4 4 13 57 43  1 3  2  0 0 1 3  1  2  1 0 4  2 56  4 2  1053 TE DG4  R 5 4 9 3 9 9 5 4 9 1 5 13 DCLP 3C 16  TS 2 2 2  63  0 9 4 7 TE 2 279 0 10  491524  R 5494086 491530 ANLP 2C 2 1  6397  10  4 05  0 9 2 5 TE  R 5494215 491509 DCTF 3D 24  5494524  TE 0 0 2 0 3 1 OO 3  0 0 152  3 4 7 2 72  4  3 1  31  1  2  70  1084 7  2  R 5494234 ACTF 20  1  340  R 5 4 9 4 190 4 9 1433 DCTF 3D 18  R  Page  129 10  5  2  0 9 4 2 TE 6279 0 3 2 2 30 11  0 8 5 5 TE 23 6259 0 1 0 2 . 10 2 0827 23  TE ME  147 0 10  52 1 1020 TE  4 11 0 1 15*  1 4 90 0998  1  73 5  TE ME  TS 0 1 2  3  3  1  TS  34  4  O 3 3  0  0  5  0 2  13 4 1 . 47 123  4  0  3  3  1  1  2 02  3.78  1  2 .95  2 2 73  46  20  1  690  940  pj  cQ CD  77  980  o  Listing 12 19 1220 122 1 1222 1223 122-1 1225 1226 1227 1228 1229 12 30 123 1 1232 1233 1234 1235 1236 1237 1238 1239 1240 124 1 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 126 1 1262 1263 1264 1265 1266 1267 1268 1269 1270 127 1 1272 1273 1274 1275 1276  o f GOOD a t 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3  13:47:26  MC82 - 3 0 9 MC82 - 3 0 9 MC82 - 3 0 9 MC82 -308 MC82 -308 MC82 -308 MC82 -308 MC82 -307 MC82 -307 MC82 -307 MCB2 -307 MC82 - 3 0 6 HC82 -306 MC82 - 306 MCB 2 - 3 0 6 MCB 2 - 3 0 5 MCB 2 - 3 0 5 MC82 - 3 0 5 MC82 - 3 0 5 MCB 2 -304 MC82 -304 MC82 -304 MC8 2 -304 MC82 - 3 0 3 MC8 2 - 3 0 3 MC82 - 3 0 3 MCB 2 - 3 0 3 MC82 -302 MC82 -302 MC82 -302 MC82 -302 MC82 -301 MCB 2 -301 MCB 2 -301 MC82 -301 MC82 - 3 0 0 MC82 - 3 0 0 MC8 2 - 3 0 0 MC82 - 3 0 0 MC82 -299 MC82 - 2 9 9 MC82 - 2 9 9 MC82 - 2 9 9 MC82 -298 MC82 2 9 8 MC82 -298 MC82 -298 MC82 -286 MC82 -286 MC82 - 2 8 6 MC82 -2B6 MCB 2 -287 MC82 -287 MC82 -287 MC82 -287 MC82 -288 MC82 -288 MC82 - 2 8 8  o n NOV  7.  1984 f o r CCId-KMMC  Page  22  BLS 6 43 1 1 1 0 4 4 6 3 0 5 SOZS 8 49 48 6305 2 20 1 .20 6 7 . 25 11.11 6305 15 32 6 14 88 6306 R 5494420 490750 1003 TE 4 1 3 6 3 0 6 SPSC 8G BL 1 38 2 3 3 4 6306 15 5 58 2 10 6306 6307 R 5494480 490805 0 9 8 3 TE 6 3 0 7 MTFF 3 47 1 1 1 5 5 3 5T BL2 6 307 120 500 225 5 30 2 1 6307 6308 R 5484454 490817 0 9 7 3 TE 6 3 0 8 MTFF 5T BL2 36 47 1 0 0 0 0 2 6308 245 156 2SOO 13 7 60 6308 6309 R 5494385 490865 0 9 3 2 TE 2 249 5 4 6 3 0 9 SOZS GR2 13 4 1 3 8 4 155 6309 45 23 50 6309 6310 R 5494354 490898 0 9 2 0 TE GV3 3 4 1 2 12 59 5 4 6 3 1 0 SOZS 8 82 3 a 170 6 3 10 50 6 3 10 63t 1 H 5494287 490882 0 8 7 8 TE 631 1 DCTF 3D DG4 4 2 2 2 479 0 0 3 15 631 1 103 1 270 20 63 1 1 6 3 12 R 5 4 9 4 2 7 5 4 9 0 8 8 0 0 8 7 0 TE 6 3 12 S O Z S SL3 2 4 1 1 0 0 4 4 8 79 7 32 6 3 12 2 10 6312 6 3 13 R 5 4 9 4 2 4 3 4 9 0 8 B 5 0 8 5 5 TE GG4 4 1 1 6 3 13 S O Z S 3 2 O 4 4 8 6 3 13 1 15 54 62 2 10 6 3 13 6 3 14 R 5 4 9 4 2 0 1 4 9 0 8 8 1 0 8 4 2 TE 6314 SPSC GR3DG3 3 4 1 2 12 8G 29 3 3 6 3 14 47 2 15 2 10 20 6 3 14 6 3 15 R 5 4 9 4 158 4 9 0 8 4 9 0 8 1 8 TE 6 3 15 S O Z S BL4 23 4 1 2 8 2 12 3 4 6 3 15 96 1 12 80 3 6 3 15 6 3 16 R 5 4 9 4 142 4 9 0 8 4 3 08 14 TE 1ME 6 3 1 6 SOZS 4 1 2 12 8 GR3 3 97 4 3 6 3 16 39 94 4 2 . 10 6316 7 5 12 II 91 2 .76 .39 3. 78 6317 R 5493692 491033 0 7 8 3 TE 6 3 17 D C T F 3D GY6 4 1 1 6 2 5 1 1 6317 66 10 33 6 3 17 6 3 18 R 5 4 9 3 6 9 5 4 9 1 0 1 2 0 7 8 0 TE 5T 6 3 1 8 MTFF GY6 23 47 2 2 12 5 5 3 6 3 18 3 1 2 18 1 2 10 20 6 3 18 6 3 19 R 5 4 9 3 6 7 3 4 9 1 0 2 9 0 7 9 7 TE 6 3 19 3 6 3 19 17 77 68 8 10  to  to  t  2  3  43 0  3  6  1 1 88 90  7 . 13  3  3 1  43 0  2 4 26  3 0  3 1  3 5  4  145 15  20 04  280 5 36  1000  1 1 78  6  10  80  220  1 3 25  t75  120  750  460  170  660  2650  1 3 25  4 1 0 3 1 1  1 4 37  85  3 3 15  43  1 4 OB  1 1  IO  160  540  1 7  10  20  50  660  7  10  30  t 1O0  1 1  10  40  860  10  6  10  20  380  1 2 22  9  10  30  260  1 .58  9  10  70  640  10 02  20 3 14  4 20  2 4 17  0 1 18  3  3  5 3 12  1 0  34  1 3 14  3 1  4 0  3 1  4 O  2 2 1  43  3  43  3 1  TS 2 3 2  3 2  1 5 60  0 1  1 40  O 1  3  0  3 1  0  0 1  34  0  3  1 1 . 76 62  2 05  1  0 1  2  2  3  1 1  1 3 4  4 O  3 2 59  1 1 74  12  10  30  1460  0  3  5  3 50  3  10  50  880  1  2  1 . 40  5  10  SO  1700  Listing 1277 1278 1279 1280 128 1 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1 305 1306 1307 1308 1309 13 10 13 11 13 12 13 13 13 14 13 15 1316 1317 13 18 13 19 1320 132 1 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334  of  GOOD 4 1 2 3 4 1 2 3 4 1 2 3 4 I 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1  at  13  MC82 2 8 8 MC82 - 2 8 9 MC82 - 2 8 9 MC82 - 2 8 9 MC82 - 2 8 9 MC8 2 - 2 9 0 MC82 2 9 0 MC82 - 2 9 0 MC82 - 2 9 0 MC82 - 2 9 1 MCB 2 - 2 9 1 MC82 - 2 9 1 MC82 - 2 9 1 MC82 - 2 9 2 MC82 - 2 9 2 MC82 - 292 MC82 - 2 9 2 MCB 2 - 2 9 3 MC82 - 2 9 3 MC82 - 2 9 3 MC82 2 9 3 MC62 - 2 9 4 MCB 2 - 294 MC82 - 294 MCB 2 - 294 MC82 - 2 9 5 MC82 - 2 9 5 MC8 2 - 2 9 5 MCB2 - 2 9 5 MCB 2 - 2 9 6 MCB2 - 2 9 6 MC82 - 2 9 6 MCB 2 - 2 9 6 MCB2 - 2 9 7 MC82 - 2 9 7 MC82 - 2 9 7 MC8 2 - 2 9 7 MC82 - 3 1 9 MC82 - 3 19 MC82 - 3 19 MCB 2 - 3 19 MC82 - 3 2 0 MC82 - 3 2 0 MC82 - 3 2 0 MC82 - 3 2 0 MCB 2 - 3 2 2 MC82 - 3 2 2 MCB 2 - 322 MC82 - 3 2 2 MCB 2 - 3 2 8 MC82 - 3 2 8 MCB 2 - 3 2 8 MC8 2 - 3 2 8 MCB 2 326 MC8 2 - 3 2 6 MCB 2 326 MC82 - 3 2 6 MC82 - 3 2 5  47:26 6 3 19 6320 6320 6320 6320 632 1 632 1 632 1 632 1 6322 6322 6322 6322 6323 6323 6323 6323 6324 6324 6324 6324 6325 6325 6325 6325 6326 6326 6326 6326 6327 6327 6327 6327 6328 6328 6328 6328 6329 6329 6329 6329 6330 6 3 30 6330 6330 6331 6331 633 1 633 1 6332 6332 6332 6332 6333 6333 6333 6333 6334  o n NOV  7,  R 5493649  sozs a  1984  for  CCid-KMMC  0825 GRIGG5  R 5492365  7  1  0 9 2 0 TE 1 3 32 1928 0 3 54 . 20  3  3  4  0  0945 Gv 1 1  3 43 1  t  1 140  0G4 1  1  1  DG4 1  1  4  2 2 1 15  1  4  I  2 80  2  1 47 1  0  0 67  DG4 1  2 1  4  1 1 50  2  1  56  123  0 9 8 0 TE 23 6249 0  20  20  1340  70  2  10  30  1 100  50  7  10  20  1360  7  1 3 75  6  20  20  920  43 0 24  7 70  7  20  30  700  143 0  2  t  2 OO  3  1  t  2  2  2  5  69  1095 TE 3 7 1 0 . 10  23  105  2  9  500  9  145  3800  493875  1 5  43  2  IO  30  460  4  10  14  10  20  720  3 OO  19  to  30  840  25  3  10  20  1360  2 60  23  10  30  340  1 2  6 6 133  3  2  TE  . IO  1 6  6 132 10  .20  3 4  TE  . 10  0 0 13  14 0  1  TE  50  3  14 0 0 1 1  2  2  35  6  10  20  1800  2  15  4  20  20  780  6066 7  10  1 0 0 0 TE  494163  34  1 2 3 1  1 0  0  34 0 3 22  2 6  1006 TE 175 4 4 2 2 10 19  0771  t  2 2 12  1 0  1054 TE 0 0 0 2 10  1 0 3 12  1 2 432 1 1  to  09O7  492712  TE 3 5 5  20  0907  494105  494305  2  5  TE 0 0 3 2 1 1 10  1 0 80  494020  lOOO R 5493145  3  491045  140  0 8 6 3 TE 174 3 3 2 10  1  BK 1  27 R 5492105  6  490992  24 R 5493100  14 0  1 2 1  0894  490974  46 R 5492400  TE 5 0 4  10  1 3 32 75  490972  10 R 5492425  12  490986  16 R 5493294 DCLP 3C  t  DG 1  15 R 5493450 MARG 5A  4  49099O  26 R 5493495 MTff 5T  1  2  BK 1  3 1 R 5493526 ACL T 2CD  t  1 70  4910O3  38 R 5493559 SPSC 8C  12 46 1  SL3DGI  17 R 5493575 MCHT 5C  2  491005 4  R 5493594 MARG 5A  23  491017 IS  R 5493610 SPSC BG  Page  PH  6148  13  13  7 30  9  10  30  80  6  19  6 55  65  120  2 10  120  0 9 2 5 TE 2 OO 1 3 4 0 TE  PH  Listing 1335 1336 1337 1338 1339 1340 134 1 1342 134 3 1344 1345 1 346 1347 1348 1 349 1 3SO 135 1 1352 1353 1 354 1 355 1356 1 357 1 358 1359 1 3CO 1 36 1 1362 1 363 1 364 1365 1 306 136 7 1 168 1 369 1 37u 137 1 1372 1373 1374 1375 1376 1377 1378 1379 1380 138 1  o f GOOD a t 2 3 4 1 2 3 4 I 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  13 47 2 6 o n NOV  MC82 - 3 2 5 MC82 - 3 2 5 MC82 - 3 2 5 MC82 3 1 5 MC82 3 1 5 MC82 - 3 1 5 MC82 - 3 1 5 MC82 3 17 MC82 -317 MC a 2 -3 17 MC82 -317 MC82 -32 1 MC8 2 -32 1 MC8 2 - 3 2 1 M ' 8 2 -32 1 Mi. 8 2 - 32 3 MC8 2 - 323 MC 8 2 323 MC 8 2 323 MC 82 - 154 MC82 - 154 MC8 2 - 154 MC8 2 - 154 MC8 2 - 156 MC 8 2 - 156 ML B 2 - 156 MC82 - 156 MC82 -032 MC82 -032 M L 8 2 032 Mi 8 2 0 3 2 ML 8 2 0 2 9 ML 8 2 0 2 9 Mi 8 2 -029 ML 8 2 0 2 9 ML b 2 06 2 M L 8 2 062 ML 8 2 0 6 2 ML 8 2 0 6 2 MC8 2 0 0 7 ML 8 2 0 0 7 ML 8 2 -007 MCB2 -007 \ MC82 0 0 1 2 MC8 2 -001 3 ML 8 2 0 0 1 4 MC8 2 -001  6334 6334 6334 6335 6335 6335 6335 6336 6336 6336 6336 6337 6337 6337 6337 6338 6338 6338 6338 6339 6339 6339 6339 6340 6340 6340 6340 634 1 634 1 634 1 634 1 6342 6342 6342 6342 6343 6343 6343 6343 6344 6344 6344 6344 6345 6345 6345 6345  7.  70 R BSL T  14  1984 f o r CCtd'KMMC  4  Page  2 1  AN CA CA BK 1 36 3 1 3 1 1 66 33 15 . 35 5 . 18 R 5492370 490616 DC IV 9 AN CA CA 28 2 3 62 27 16 15 6 68 R CA AN 1 1 49 65 3 1 15 25 5 80 R 5492720 494353 ACLT 2CD BA TH CA GR 1 34 4 1 19 3 5 3 34 16 37 8 8 1 R 5492755 493715 RVLT 4 RV CA I H G R 1 S L 2 4 0 12 36 1 8 1 4 1 78 6 2 12 19 R 5492990 493863 MT F P 5T AN CA CA DG2DG4 12 4 1 3 12 5 9 15 16 04 8 25 R 5492830 494005 ANLP 2C AN CA CA OG I B L 3 3 4 4 27 1 24 60 06 15 8 33 R 5492820 493675 ABL T 2BC AN CA CA DG2 3 4 1 46 32 7 80 6o 65 15 79 R 5493J75 492950 ANLP 2C AN CA CA B L 3 13 4 13 3 2 7 48 6 1 76 15 32 R 5493440 493380 DCFL 3A RV CA CA SL 1 2 12 49 1 3 1 58 69 40 15 54 R 5494056 491142 CA GG50G1 DBLI 3BC AN 3 4 "* 24 3 5 62 2 0 3 11 18 53  24  87  1 2 45  2 95  32  0 00 4 73  0  0  1020  10  30  0 1 16  10 2 1  0 1 28  0  0 OO 4 07  O 1 04  10 3 1  0 1 IO  0  0 OO 3 52  0 1 02  to  0 1 04  0  1 0 00 2 22  0 60  10 30  5  OO 5 1  0 2 52  IO 02  0 1 40  0  4 0 O 2 . 92  0 OO 4 . 52  O 30  IO 30  O 2 9 1  0  23 0 3 0 3 96  1 0 OO 3 23  0 56  10 29  0 2 89  0  1 O 00 80  0 58  10 32  0 2 26  O  4  1 O.OO 3 90  0 88  10 32  0 2 51  0  00 65  0 1 46  10 13  0 1 49  0  0 OO 2 61  0 1 69  10 12  O 3 01  0  35  30  13  TE ME I S 1 0 1 0 1 8 0 0 0 0 77 1 8 1 3 .43 07 10 TE ME T S 2  20  42  20 94  0 1 9 1 TE ME TS  39  . 20 73 1 59 1025 IE ME 1 3 32 597 0 1 20 10 i1 16 8 14 0990 ME 2 2 2 1 0 0 36 . 20 17 52 1160 ME 2 3 12 8 3 4 6 1 0 39 30 i1 34 4 17 1077 I E ME 1 3 23 6 4 2 5 0 2 20 20 1I 0 9 3 37 1016 TE ME 1 3 32 6 4 2 5 O 2 24 60 11 2 1 3 47 0 9 0 9 TE ME 2 2 423 6412 3 2 38 30 i1.07 2 95 1 0 6 0 TE ME 1 3 1 7 0 0 93 30 .67 2 51 08 17 ME 1 3 432 6 2 5 9 3 2 375 . 20 .56 , 3 97  5 69  0 4 58 TS 0 2 0  32 0 3 0 2 94  TS 0 3 0  4 0 0 0 84  0  2 0  0  2 0  0  0 18  23  TS 0 2 0  23 0 3 O 2 26  0 1 0  3 0 3 0 3.66  TS 0 1 0  24  0 3 0  1 23 2 314  0  0 2  19  0 3  30  1 0 5  0 0  PJ  oo  Page  TABLE  A.5  194  L i s t i n g o f 1983 r o c k c h i p s a m p l e s ( i n c l u d i n g l o c a t i o n descriptions and c h e m i c a l a n a l y s e s ) . Format f o r these l i s t i n g s are i n Table A . 1 . D e t a i l e d codes for s p e c i f i c f i e l d s are i n T a b l e s A . 2 and A . 3 .  101  Lls tIng 1 2  3  4 5  6  7 8 9 10  1 1 12 13 14 15  16 17 18  19  20 2 1 22 23 24 25 26 27 28 29 30 3 1 32 33 34 35 36 37 38 39 40 4 1 42 43 44 45 46 47 48 49 50 5 1 52 53 54 55 56 57 58  1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  1  2 3 4  1  2 3 4  1  2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2  at  13 5 7 : 1 7 o n NOV  MC83 - 6 2 6 MC83 - 6 2 6 MC83 -626 MC83 6 2 6 MC83 - 6 3 0 MC8 3 - 6 3 0 MC8 3 - 6 3 0 MCB 3 - 6 3 0 MCB3 -63 1 MCB 3 6 3 1 MC83 6 3 1 MCB 3 -63 1 MCB 3 -632 M( B3 6 3 2 MC8 3 -632 Ml B 3 6 3 2 MCB 3 - 6 3 3 MCB 3 - 6 3 3 MCB 3 6 3 3 MC83 - 6 3 3 MC 8 3 6 3 5 MCB 3 - 6 3 5 MC8 3 6 3 5 MCB 3 6 3 5 MC 8 3 -636 MCB 3 6 3 6 MCB 3 6 3 6 MC83 6 36 MCB 2 192 MCB 2 192 MC8 2 - 192 MCB 2 192 MCB 2 0 1 9 MCB 2 - 0 1 9 MCB 2 - O I 9 MCB 2 - 0 1 9 MCB 2 0 1 5 MC82 0 15 MCB 2 0 1 5 MC8 2 0 1 5 MC82 -3 15 MC82 3 15 MCB2 3 15 MCB 2 -3 15 MC82 2 5 8 MCB 2 - 2 5 8 MCB 2 -258 MC8 2 - 2 5 8 Ml 8 2 2 7 3 MC82 - 2 7 3 MCB2 - 2 7 3 MCB 2 - 2 7 3 MC82 - 154 MC82 - 154 MC82 - 154 MC82 - 154 MC83 6 3 7 MCB 3 -637  6380 6380 6380 6380 638 t 638 t 6381 63B 1 6382 6382 6382 6382 63B3 6383 6383 63B3 6384 6384 6384 6384 6387 6387 6387 6387 638B 6388 63B8 6388 6 145 6 145 6145 6 145 6234 6234 6234 6234 6236 6236 6236 6236 6335 6335 6335 6335 6277 6277 6277 6277 6 292 6292 6292 6292 6339 6339 6339 6339 6389 6389  7,  1984 f o r CCId-KMMC  Pane  R 5 4 9 6 2 3 0 49 1540 BSLT IA 55 08 15 6 9 R 5495850 490650 BSLT IA  8 21  47 45 17 12 R 5495840 490580 BSLT 1A  9  16 12 48 8 0 R 5495830 490530 BSLT IA  8  4 8 16 16 32 R 5495850 490460 BSLT IA  9  10 22  7 04 ME  9 85 6236  1 96  12  19  1 27  0882  8 99 ME  6 03 6238  3 . 07  1 28  19  5  0945  7 25 ME  7 34 6237  5  09  18  4 7 1  0975  7 27 ME  5 61 6234  t 96  3  44  14  5  1025  8 02  5  4  0  72  . 24  3 79  1 14  24  5 06  26  18  2  4  10 27  20 2 66  9 35  20 22  20 3 25  3 2 73  10 18  10 4 42  0 1 16  10 2 1  0 1 28  5 14  20 02  30  27  60  40  92  72  18 0 3 45 .0 6 R 5495530 490940 BSLT IA  6230  92  78  10 56  ME  82  82  47 46 18 19 R 5 4 9 5 5 1 0 4909OO BSLT IA  0798  90  1 09 1070  ME  1070  8 85 ME  93  32  18  50  2 96  5 91  49 04 6 9 1 4 12 16 79 93 8 60 9 53 O 9 4 0 TE ME TS R 5492250 493800 1 4 4 0 2 0 3 132 4 2 BSLT 1A BA I H 0G2 3 12 2 2 1 55 23 9 85 18 3 10 a 97 3 87 1 69 14 43 16 23 7 4 1 52 33 63842234 R 5495840 490445 0 8 9 2 TE ME TS BK 1 3 31 1 2 3 9 0 1 0 1 37 0 BSPL IA 24 1 5 10 24 1 75 10 50 9 93 4 16 1 05 6 31 6 10 5 0 12 17 25 63812236 0 8 8 0 TE ME TS R 5495830 490620 BSLT 1 12 129 0 1 0 1 432 7 0 GG10G2 1 4 1 3 87 34 6 55 1 75 48 2 20 1 78 47 48 10 47 . 95 a 27 5 76 16 79 R TE ME TS BSLT IA AN CA CA BK1 36 3 1 2 1 O 1 O 1 2 8 O O 45 20 0 0 00 31 1 1 0 t 8 1 3 43 4 73 5 18 77 66 33 15 35 R 5 4 9 4 157 4 9 3 2 7 2 1257 TE ME TS PH 1 RYL T 4A 2 17 0 1 O 3 64 0 3 RY CA CA SL 1 23 2 1 3 1 1 1 OS 15 40 . 10 9 1 1 14 21 4 75 12 9 3 t 75 19 76 8 9 1084 6 3 9 7 4 9 0 2 4 0 TE R 5495050 t 0 3 1 RYLT 4 BL2 i 3 3 7 1 0 0 0i Ci 2 0 1 3 1 90 44 IO 445 152 1 OO  03  18  14  77  1  R 5492755 493715 RYLT 4 RY CA 36 7B 62 R 5495260 489870 RlLT 4A  69  0990  TH G R 1 S L 2 1 12 19  4 0 12 2 2 8 36 1 4 1  ME T S 2 1 0 0 0 31 20 0 17 52 0980 ME  2  4 0  0  0 84  PJ  LQ  0 2  OO 5 1  2  0 52  10 02  0 1 40  (D  Cn  List*ng 59 60  6  1  62 63 64 65  66  67 6B 69 70 7 1 72 73 74 75 76 77 78 79 SO 8 1 82 83 84 85 86 87 83 89 90 9 1 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 1 10  1 11 1 12 1 13 1 14 1 15 1 16  F TOT a t 1 3 : 5 7 : 1 7  3 MC83 -637 4 MC83 -637 1 MC83 -644 2 MCB3 -644 3 MC83 -644 4 MC83 -644 1 MC82 - 0 4 0 2 MC82 - 0 4 0 3 MC82 - 0 4 0 4 MC82 - 0 4 0 1 MC8 2 - 151 2 MC82 -15 1 3 MC82 -15 1 4 MC82 151 1 MC82 - 185 2 MC82 - 185 3 MC82 - 185 4 MC82 185 1 MC82 - 186 2 MC82 - 186 3 MC82 - 186 4 MC82 - 186 1 MC82 -4 10 2 MC82 -4 10 3 MC82 -4 10 4 MC82 -4 10 1 MC82 - 444 2 MCB2 -444 3 MC B 2 4 4 4 4 MC82 -444 1 MC8 2 - 2 3 3 2 MC8 2 - 2 3 3 3 MCB2 -233 4 MCB2 - 2 3 3 1 MC82 -238 2 MC8 2 -238 3 MC82 -238 4 MOB 2 -238 1 MO 8 2 -317 2 ML 8 2 317 3 MCB2 -317 4 MC8 2 -3 17 1 MC82 0 0 7 2 MC82 -007 3 MC82 -007 4 MCB2 0 0 7 1 MC83 -601 2 MC83 -601 3 MC83 -601 4 MC83 -601 1 MCB3 -601 2 MC83 -601 3 MC83 -601 4 MC83 6 0 1 1 MC83 -603 2 MC83 -603 3 MC83 -603 4 MC8 3 6 0 3  o n NOV  7.  1984 for  CCld-KMMC  Page  6389 2 34 12 2 08 02 6389 9 0 10 3 64 33 6292 6397 R 5495060 490230 1208 ME 6 3 9 7 RVLT 44 6397 02 15 75 2 1 6397 2 74 1 55 9 3 17 1023 TE ME T S 2088 6088 R 5493380 493475 32 0 0 6088 DCFL 3A DA CA CA DG1 1 12 1 3 2 87 0 0 0 1 1 64 4 6088 1 152 150 20 2 1 1 2 43 14 34 2 58 47 2 42 6088 7 0 37 3 34 6348 1313 I E ME TS 6 103 R 5 4 9 3 1 4 3 4 9 4 1 5 8 1 AN CA GG3 12 4 2 2 12 7 1 0 1 0 0 6 103 D C F L 3A 0 0 3 37 19 64 1 12 1 16 6 103 10 3 63 5 17 7 26 17 0 2 6 103 55 0 1 1 08 4 96 3 64 2 138 0 9 2 8 I E ME I S 6 138 R S 4 9 2 3 15 4 9 3 9 6 8 OA CA CA BL3 4 12 1 1 2 8 0 1 0 1 6 138 D C F L 3A 24 O 3 1 2 65 1 1 18 2 10 6 138 2 1 1 79 5 38 13 9 5 . 50 92 6 13S 72 5 1 3 67 0 9 3 0 I E ME TS 6 139 R 5 4 9 2 3 0 3 4 9 3 9 4 7 34 0 0 AN CA CA B L 3 01 34 1 2 6 139 D C F L 3A 2 129 5 3 1 2 9 1 2 42 2 6 139 14 10 3 85 5 77 .74 2 0 5 16 57 6 139 6 3 66 3 19 3 58 6 18 1 0 5 4 9 3 4 0 0 4 9 2 1 2 8 5 - 1 8 - 0 2 1595 0 1597 0 0 7 6 0 I E 2 2 5 DG4BL1 2 1 0 7 0 0 0 4 6 18 1D C F L 3A 1 4 22 6 5 10 6 18 1 8 3 1 30 6 18 1 6 2 2 4 D 5 4 9 3 4 4 6 4 9 2 0 6 0 5-18- 13B 1224 0 1226 0 0 7 6 0 TE 27 0 6224 DCFL 3A GR1VW2 2 2 2 2 8 1 0 1 0 2 27 5 65 6224 1 12 160 10 25 1 18 6224 63912250 6 2 50 R 5 4 9 5 4 4 2 4 9 0 0 9 7 1105 TE ME TS 2 4 6 2 2 12 3A 28 0 0 1 1 124 1 0 6 2 5 0 DFBC GV 1 B 4 10 1 103 10 10 6 2 50 5 1 6 67 2 44 6250 6 0 92 17 39 7 1 3 01 3 93 2 2 5 7 6257 R 5495335 490205 1173 TE ME TS 6257 DCFL GV 1 3A 528 5 2 1 1 3 4 2 2 2 12 O 3 1 6257 48 9 1 1 6 3 40 9 10 6257 64 17 5 66 68 2 15 16 45 3 04 4 2 1 6 3 3 6 R 5 4 9 2 3 7 0 4 9 0 6 16 0 7 1 0 TE ME TS 6 3 3 6 DC IV 9 AN CA CA 6336 42 0 00 28 2 3 20 0 0 4 07 6336 6 68 .94 191 5 69 62 27 16 15 6344 R 5 4 9 3 4 4 0 4933BO 1 0 6 0 I E ME TS 1 6344 DCFL 3A RV CA CA SL 1 2 12 1 3 24 0 3 1 7 0 0 0 1 6344 93 49 . 30 0 0 o.oo 1 3 5 65 6344 15 5 4 1 5 8 67 2 51 1 2 3 69 . 4 0 6366 6365 R 5494150 491340 092 1 ME 6365 DCFL 3A 6365 4 79 4 02 4 16 6365 57 2 61 6 5 01 14 19 6 3 6 6 R 5 4 9 4 ISO 4 9 1340 092 1 ME 6365 6366 DCFL 3A 6366 5 17 4 40 6366 6 5 74 14 9 9 58 2 63 2 99 6368 R 5494630 4 0 1 7 1 0 1340 ME 6368 DCFL 3A 6368 6368 69 99 52 2 47 2 56 13 5 5 3 . 90 1 58  46  58  1 54  02  1 03  02  6 2 56  10 07  30  55  10 26  40  35  3 31  10 07  20 1 OO  10 1 3  20 2 19  14  20  30  25  10  20  2 80  10 13  20 2 55  2 05  10 16  20 1 93  0 1 04  10  0 1 10  0 1 46  IO 13  1  9 2 Ol  2 75  3  1 6  3  1  1  56  0 1 49  2  17  27  PJ  2 67  16  3  1 1  23  1 72  2  14  cQ (5 LD  L1sting 1 17 1 18 1 19 120 12 1 122 123 124 125 126 127 128 129 130 13 1 132 133 1 34 135 136 137 138 139 140 14 1 142 143 144 145 146 147 148 149 150 15 1 152 153 154 155  156  157 158 159 160 161 162 163 164 165 166 167 168 169 170 17 1 172 173 174  FIOI 1 2 3 4 1 2 3 4  1  2 3 4 1 2 3 4 1 2 3 4  1  2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2  at  13:57:17  o n NOV  MC8 3 - 6 0 9 6 3 7 0 R 5 4 9 5 0 7 0 3A MC83 - 6 0 9 6 3 7 0 D C F L MC8 3 - 6 0 9 6 3 7 0 7 1 MC8 3 - 6 0 9 6 3 7 0 MCB 3 - 6 0 9 6 3 7 1 R 5 4 9 5 0 7 0 MC83 - 6 0 9 6 3 7 1 D C F L 3A MC83 - 6 0 9 6 3 7 1 7 1 MC83 - 6 0 9 6 3 7 1 MCB3 -6 10 6 3 7 2 R 5 4 9 4 9 9 0 MC83 -6 10 6 3 7 2 D C F L 3A MC 8 3 6 10 6 3 7 2 MC8 3 6 10 6 3 7 2 65 ML 8 3 -6 13 6 3 7 4 R 5 4 9 4 2 7 0 MCB 3 6 13 6 3 7 4 D C F L 3A MCB 3 6 1 3 6 3 7 4 MCB 3 6 13 6 3 7 4 66 MCB3 -6 1 3 6 3 7 5 R 5 4 9 4 2 7 0 MCB 3 -6 1 3 6 3 7 5 D C F L 3A MC83 6 1 3 6 3 7 5 MCB3 6 1 3 6 3 7 5 67 MC83 -617 6 3 7 6 R 5 4 9 4 6 7 0 MC83 6 1 7 6 3 7 6 D C F L 3A MC83 6 17 6 3 7 6 MC83 -617 6 3 7 6 69 MC83 -6 19 6 3 7 8 R 5 4 9 4 6 4 0 MC83 6 19 6 3 7 8 D C F L 3A MCB 3 6 19 6 3 7 8 MC83 -6 19 6 3 7 8 66 MC83 -620 6 3 7 9 R 5 4 9 4 5 7 0 MCB 3 -620 6 3 7 9 D C F L 3A MCB 3 -620 6 3 7 9 MCB 3 6 2 0 6 3 7 9 68 MC83 6 3 4 6 3 8 5 R 5 4 9 5 5 0 0 MC8 3 6 3 4 6 3 8 5 D C F L 3A MCB3 6 34 6 3 8 5 MC83 -634 6 3 8 5 57 MCB3 -638 6 3 9 0 R 5 4 9 5 2 5 0 MCB 3 6 3 8 6 3 9 0 O C F L 3A MCB 3 -638 6 3 9 0 MC83 6 3 8 6 3 9 0 7 1 MC83 6 3 9 6 3 9 1 R 5 4 9 5 4 3 0 MC83 6 3 9 6 3 9 1 D C F L 3A MC8 3 6 3 9 6 3 9 1 MCB 3 -639 6 3 9 1 59 MC8 3 -64 1 6 3 9 3 R 5 4 9 5 1 5 0 MC8 3 -64 1 6 3 9 3 D C F L 3A MCB 3 64 1 6 3 9 3 MCB 3 64 1 6 3 9 3 59 MC83 64 1 6 3 9 4 R 5 4 9 5 150 MCB3 64 1 6 3 9 4 D C F L 3A MC83 -64 1 6 3 9 4 MCB 3 64 1 6 3 9 4 58 MC83 -643 6 3 9 6 R 5 4 9 5 0 2 0 MC8 3 6 4 3 6 3 9 6 D C F L 3A MCB 3 6 4 3 6 3 9 6 MC8 3 6 4 3 6 3 9 6 70. MC83 -645 6 3 9 9 R 5 4 9 5 3 2 0 MCB3 -645 6 3 9 9 D C F L 3A  1984  f o r CCId=KMMC  Page  1  4898O0  76 14 26 489BOO  2 85  69 14 OO 489740  2 68  33 15 4 0 489640  4 89  62 15 27 489640  4 90  04 15 491070  4 75  12  3  42 14 54 491180  15 15 491380  1  37  98 ME  2 03 6370  4 84  2 . 46  09  1 27  1 140  89 ME  2 22  5 03  2 42  08  1 38  1205  2 23 ME  3 63 6375  3 83  2 34  18  2 29  1280  1 9 1 ME  2 32 6374  4 4 1  2 8  18  1 79  1280  1 83 ME  2 47  4 63  2 5 1  18  1 76  I200  1. 64  1 51  4 79  2 60  16  1 69  2 02 ME  2 . 27  4  2 98  17  2 58  1225  1 55 ME  3 OS  3 6  2 34  16  1 85  1250  3 33 ME  6  63  3 20  28  1010  1 1088  68 ME  2 63 6250  4 OO  1 83  IO  1 72  3 99 ME  2 09 6394  3  72  1 46  18  3 . 04  5 08 ME  74 6393  1  15  5 05  2 1  3 57  79  1  29  5 03  22  3 46  .30  64  66  66  58 1200  1  4 35  1  60  4  90 15 67 489840  B 06  5 1 13 64 490150  2 62  .3  81 17 62 490030  7 3 1  77  08 15 5 0 49OO30  7 87  95 15 490040  7 99  99 14 87 490240  637 1  32  69 14 30 490430  16  ME  140  l  ME  62  1 04  1 100 83 1 10O  3  00  .81  1  5  1  11  150  ME  165  87 ME  34  1  3 1  17  3 01  •a pj  1  (D 23 6259  2 96  3  14  1 1  1 90 L O  L is tIng 175 176 177 178 179 180 18 1 182 183 184 185 186 187 188 189 190 19 1 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 2 10 2 1 1 2 12 2 13 2 14 2 15 2 16 2 17 2 18 2 19 220 22 1 222 223 224 225 226 227 228 229 2 30 23 1 232  FTOT 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  at  13:57:17  MC83 - 6 4 5 MC8 3 - 6 4 5 MC83 -647 MC8 3 -647 MCB3 -647 MC83 -647 MC83 6 4 7 MC83 -647 MC83 -647 MC83 -647 MC83 - 6 4 9 MC83 - 6 4 9 MC8 3 - 6 4 9 MC8 3 6 4 9 M C 8 3 -654 MC83 -654 MCB3 -654 MC83 -654 MCB3 0 4 0 MC B 3 0 4 0 MCB3 0 4 0 MC83 0 4 0 MC8 3 - 185 MC83 - 185 MCB3 - IBS MC83 - 185 MCB3 - 2 3 3 MCB3 - 2 3 3 MC83 - 2 3 3 ML 8 3 - 2 3 3 MC83 2 3 8 ML83 238 MC8 3 -238 MC83 -238 MC83 -60B MC83 -608 MC83 -608 MC83 -608 MC83 6 18 MC83 6 18 MC83 -6 18 MC83 -6 18 MC82 - 100 MC62 - 1 0 0 MC8 2 - too MC82 - too MC82 - 0 0 5 MC82 - 0 0 5 MC82 - 0 0 5 MC82 - 0 0 5 MC82 -0O6 MC82 0 0 6 MC82 -006 MC82 -006 MC82 - 169 MC82 169 MC82 169 MC82 - 169  6399 6399 6400 6400 6400 6400 6401 6401 6401 6401 6402 6402 6402 6402 6404 6404 6404 6404 2088 2088 2088 2088 2 138 2 138 2 138 2 138 2250 2250 2250 2250 2257 2257 2257 2257 6369 6369 6369 6369 6377 6377 6377 6377 6020 6020 6020 6020 6090 6090 6090 6090 609 1 609 1 609 1 609 1 61 18 6 118 6 118 6 118  o n NOV  7.  1984 f o r C C l d - K M M C  Page  58  3 77 ME  2  10 6401  3 04  1 5 1  . 19  2 79  1000  2 .4 3 ME  2 97 6400  4 62  1 69  18  1 63  lOOO  2 .39 ME  2 89  5  16  1 46  . 20  1 91  1 02  3 08  3 02  1 1  2 07  6 3 34 16 0 7 R 5495230 489660 DCFL 3A  6  .69  6 5 12 15 34 R 5495230 489660 DCFL 3A  4 .92  64 76 15 43 R 5495140 490260 DCFL 3A  4 85  70 1 150  7 1 36 15 OO R 5495170 489870 DCFL 3A  2 9 1  35  72 .06 12 87 P 5493380 493475 DA CA CA DG1 DCFL 3A  2  14 5 0 70 12 P 5492315 493968 DA CA CA BL 3 DCFL 3A  2 54  72 12 14 P 5495442 490067 DFBC 3A  3 64  67  1050  48  32  1 12  4  18 GY 1  6 I 03 17 68 P 5495335 490205 DCFL 3A GV 1  6  63 99 16 54 R 5 4 9 4 9 4 0 4 9 1300 ANFL 2A  5  16 32 50 04 R 5494660 491150 ANFL 2A  8  1 3  49 3 94 2 78 6088 1023 ME TS 2 87 0 0 0 1 32 0 0  46 12  0928 2  1 1 50  2 46 2 2  12  7 1  70  3  4 2 2  7 1  2  15  1 1  1 84  2 60  08  1 60  2  3 18 2 .4 1 2 38 ME TS 6 138 1 8 O 1 0 1 24 0 3  88 1 76 5 62 1 105 62506391 ME TS 28 0 0 1 1 124 1 0  3 1  10  99  3 29 4 65 2 45 1 173 6257 ME TS 528 5 2 1 1 12 0 3 1  82  17  2 52  2 38 ME  3 02  5 51  04  18  1 92  1340  7 27 ME  6 51  4 31  1 38  25  5  1200  2 25  17  1 98  68  39  84 ME  88  16 2 1 4 73 66 4 .96 6 5 11 1 8 1 2 72 R 5493435 492989 0 9 3 3 TE ME TS AGLM 2A AN CA CA DG2 3 26 3 2 24 5 8 0 0 0 1 32 0 3 1 14 1 1 1 4 88 1 6 185 10 2 .04 62 7 9 14 24 7 55 1 08 31.72 31 6 5 0 9 8 3 TE R 5492680 493875 ABLT 2BC GR2DG2 24 4 2 3 3 6 5 2 9 0 2 0 1 342 0 32 2 1 8 4 29 20 120 10  3 48  31  10 29  40 2 64  5  10  30  03  4  10  20  4 89  5  10  10  1  R 5492680 493720 ABLT 2BC 64 R 5492B65 49413 1 AGLM 2B 1 1  DG 1 1  0G2 1  3 12  0 9 9 0 TE 4 2 3 234 6247 O 67 20  10 5 6 2 3 1 101  1 127 TE 4 5 0 10  1  0 1  0 0 1  1  34 0 3 5  2  23 0 0 13  1 5  P LQ (D L£>  00  TOT  L i s ting i 233 234 235 236 237 238 239 240 24 1 242 243 244 245 246 247 248 249 250 25 1 252 253 254 255 256 257 258 259 260  1 2 3 4 1 2 3 4 t 2 3 4 I 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4  at  13.57:17  MC82- 172 M C 8 2 - 172 MCB2- 172 MC82- 172 MC82- 173 MC82- 173 MC82- 173 MC82 - 173 MC82 174 MCB 2 -174 MC82 - 174 MCB 2 174 MC82- 189 MC 8 2 -189 MCB 2 -189 MC82 - 189 MC82- 201 MCB2- 201 MC82 -2 0 1 MCB 2 201 MC82 -207 MCB2- 207 MC82 207 MC82- 207 MC82- 226 MC82 -226 MCB 2 226 MCB 2 -2 2 6  6121 6 121 6121 6121 6122 6 122 6122 6 122 6123 6 123 6123 6 123 6 142 6 142 6 142 6 142 6 154 6 154 6 154 6 154 6 158 6 158 6 158 6158 6 1B8 6 188 6 188 6 IBB  o n NOV R 5492795 ANFL 2A  7,  1984 f o r CCtd=KMMC  Page 1075 TE 2 817 0 . 10  4 9 4 117 DG2 49  12  1  2  14 2  3 65  0 0 1 234  1  4  0 4  9  1065 TE ME 494098 CA 0G2 1 8 0 0 0 1 23 4 0 BA 1 12 2 1 1 15 76 1 1 100 20 54 7 9 16 91 1 25 3 42 6 . 15 10 46 R 5492765 494086 1052 TE AN8X 2B 0 G 1 B L 3 13 6 2 3 43 4 2 5 6 0 2 0 2 326 0 3 1 3 1 1 55 10 63  7 1  6  10  40  10 33  40 2 51  460  R 5492780 ANFL 2A  493883 31 5 2 2 AN TH CA DG2 127 1 1 59 1 57 8 2 16 91 10 0 0 R 5 4 9 3 8 7 8 4 9 2 4 15 ANFL 2A OA CA CA DG1VW2 4 3 2 3 2 69 18 1 6 15 2 0 4 60 66 4 0 R 5 4 9 3 123 4 9 2 0 3 5 ANFL 2A DG 1 1 2 2 3 84 1 3 128  TE ME 32 2 0 5 0 1 0 3 14 2 13 2 66 2 87 1 0 2 0 TE ME 2 78 0 0 0 1 82 0 3 2 13 . 10 65 1 82 2 51 0 8 6 6 TE 23 0 2 8 0 0 0 1 19 26 20  R 5492305 ANFL 2A  0 9 2 0 TE 2 78 0 O 0 1 8 2 3 28 40  R 5492272 AGLM 2AB  493850 DG 1 44  3  1 1  2 2 3 68  60  5 85 3 63  5 . 10  1 4 60  0  6 55 3 97  6 1 08  10 23  20 2 81  380  5 IO  10 13  20 1 53  7O0  10  0  0  0937  4  30  0 3 26  1 4  3 05 4 1  2  5  35  5  10  20  180  1 5  25  5  10  20  540  pj  LQ  fD  LD  Page  B.  WHOLE  ROCK  AND TRACE  B.1  Whole  Rock  Analyses  One  hundred  freshest  most  Emphasis  was  pits. was  X-ray  done  B.C.,  by  Major  the  three  Table  in  taken  the  undiluted  analyses data  are from  contained  values  of  packages;  reported 38  major  basalt,  powder  in  from  rock  the  major  the  analyses.  Britannia  element  open  analyses  from trace  glass  discs  elements  were  pellets.  Tables  A . 4 and  samples,  A . 5 on  card  recalculated  to  4.1.  elements dacite  of  Na a n d  selected  i n Table  whole  determined  flux.  pressed  for  samples  Brooksbank A v e . , N . Vancouver,  were  III  for  vicinity  spectrometry  Chemplex Grade  are  Average  were  Concentrations  element  % dry,  dacites  fluorescense  from  Chemical  100  the  units  ANALYSES  fist-sized  Chemex L a b s L t d . , 212  with  determined  4.  on  CHEMICAL  thirty-three  massive  V7J 2C1.  diluted  and  ELEMENT  200  for  and  the  main  rock  types  in  rhyodacite  are  contained  Petrographic  for  each  in  4.2.  Thin samples  sections  analysed  were  for  cut  major  by  Coots  elements.  of  the  Page  B.2  Trace  Element  Samples from  the  present) report, Three  up  to  faces  of  outcrops  along  four  from  and  every  northeast 1983)  -  thirty-four  1973  in  B.C., are  by  for  meters  southwest  rock  Anaconda d r i l l  trace  elements  Chemex L a b s  core  in  Preliminary produced  contained  in  percentage elements Anomalous  L t d . , 212  Table  least 1983).  Appendix  estimated Table  into  sections  were  randomly  outcrop  co.  Shear  including  analysed  Fe.  was  (priv.  Britannia  samples,  Co, and  were  The  for  Zone. 48  Cu, Zn,  analyses  made  Means  C . 1 . From  of  and  were the  these  elements  and  pressed  are  powder  analytical  manipulation of for  Percentage  aided  anomalous  from  Brooksbank A v e . , North  thresholds  C.1.  thresholds  three  taken  Vancouver, procedures  C.  statistical  histograms  population.  (if  the  chip  V7J 2C1. Geochemical preparation  included  data  25  were  Table A . 4 .  Analyses pellets  chips  crosscutting  Mo, A u , A g , N i , A s , Hg, B a ,  contained  in  2 kilograms of  K.M.McColl,  samples Pb,  Analyses  of  hundred  201  were  division  of  background thresholds determined  trace  elements  cumulative  background  estimated  trace  the  by  rock  frequency  plots  analytical values populations  from  the  mean  population 29  element  locations  (priv.  co.  by of  are  also  type.  anomalous included  anomalous report,  and  for  rock the  type  in  at  K.M. McColl,  TABLE B.1  ROCK T Y P E n = 1  ELEMENT  Cu Mo Pb Zn Ag Ni Co Fe As Au Hg Ba  ppm ppm ppm ppm ppm ppm ppm  % ppm ppb ppb ppm  T a b l e o f e s t i m a t e d t h r e s h o l d s f o r e l e m e n t s by r o c k elements i n samples from the B r i t a n n i a Ridge a r e a . T a b l e s A.4 and A . 5 . RHYOLITE 5 X  20 3 94 62 .3 2 3 1 9 22 24 448  THR  DACITE 80 2  30 7 75 1 00 .8 2 3 1 15 50 15 210  X  12 1 2 76  -  1 4 2 4  -  26 575  THR  1 00 6 7 1 70 .3 4 17 4 20 15 55 1800  ANDESITE 107 X  47 1 2 80 3 13 3 5 23 498  BASALT 4  SCHIST 57  THR  X  THR  X  117 7 45 308 . 1 40 30 7 53 20 81 2000  28 2 1 62 .7 32 26 7 5 12 16 355  40 3 1 60 .1 70 30 8 6 15 16 500  type for trace Data are from  SEDIMENTARY 70  THR  X  THR  1 5 2000 2 9 41 2 58 220 .2 .2 34 4 7 20 2 6 6 47 20 70 597, 1200  28 2 2 81 .1 6 11 2 8  1 59 12 71 1 80 1 56 25 5 90 20 70 1 200  1. T h e n u m b e r o f s a m p l e s i n c l u d e d i n e s t i m a t e is "n" . 2 . T h e mean o f t h e b a c k g r o u n d p o p u l a t i o n i s " X " , t h e e s t i m a t e d threshold is "THR".  -  31 329  anomalous  Page  C.  GEOCHEMICAL  PREPARATION  AND A N A L Y T I C A L  203  PROCEDURES  C.1  Trace Element Determination The f o l l o w i n g a r e p r o c e d u r e s p u b l i s h e d by Chemex L a b s L t d . effective April 1982. 1. Geochemical samples ( s o i l s , s i l t s ) a r e d r i e d a t 80 C f o r a p e r i o d o f 12 t o 24 h o u r s . The d r i e d s a m p l e i s s i e v e d t o -80 mesh f r a c t i o n t h r o u g h a n y l o n and s t a i n l e s s steel sieve. Rock g e o c h e m i c a l m a t e r i a l s are c r u s h e d , d r i e d and p u l v e r i z e d to -100 mesh. 2. A 1.00 gram p o r t i o n o f t h e sample i s w e i g h e d i n t o a calibrated test tube. T h e s a m p l e i s d i g e s t e d u s i n g h o t 70 % HCIO^ and c o n c e n t r a t e d HNO3. Digestion time = 2 hours. 3.  Sample  water. before  Sample being  4. unit  volume  is  adjusted  solutions  analyzed  Detection  by  limits  are  to  25  mis.  homogenized  atomic using  and  absorption Techtron  using  demineralized  allowed  to  settle  procedures.  A . A . 5 atomic  absorption  are: Copper  1  ppm  *Silver  0.2  ppm  *Lead  1 ppm  *Nickel  1 ppm  *Chromium  5  ppm  *Cobalt  1 ppm  Manganese  5  2  ppm  Iron *  Ag, Pb,  Co,  and  Molybdenum  Cadmium N i are  1 ppm  0.1  corrected  Zinc  1  ppm  for  background  absorption. 5. limits 0.1  Elements are  ppm.  present  reported  as  in  one  concentration half  the  below  detection  the  limit,  detection i.e.  Ag  -  ppm  ppm  Page  PPM A and  Arsenic:  digested  of  gram  1.0  nitric  the  the  sample  acid  to  solution  digest the  204  is  digested  strong is  solution  content  fumes  diluted  acidified,  reduced  arsenic  is  of  to  mixture  perchloric  with  converted  determined  a  volume  reduced is  with  and  using  perchloric  acid.  mixed.  K l and to  of  The An a l i q u o t  mixed.  arsine  A  with  flameless  of  portion  NaBH  and  4  atomic  absorption. Detection  limit:  1 ppm  PPB M e r c u r y : The of  sample  is  digested  hydrochloric acid.  solution closed added then  flushed it a  is  to  absorption  reduce  mercury  out  of  the  measured  Varian  by  a  reaction  cell. to  its  elemental vessel  vapour  with  the  standard  solutions  absorbance carried  limit:  5  ppb  of  the  the  small  resulting  connected is  state.  The  into  the  absorbance  same  to  amount clear a  rapidly mercury  absorption  absorption  freshly-prepared  through  a  sulfate  atomic  The  plus  flask  Stannous  reaction cold  acid  digestion  Spectrophotometer.  compared  Detection  nitric  Following  transferred  system to  where with  is  with  of  cell  methods  samples  mercury  procedure.  is  is  Page  205  Barium: A 0.20 NHO^ a c i d s of  to  flame.  Gold  NaCl  Analysis  N.A.A.  The  sample  is  metals  bead.  Sample in  a  cupelled  beads,  beads  quantified  for  1ug/kg  (ppb).  is  with  baked to  a mixture  residue  reduce  by AAS u s i n g  fused lead  in  are  gold.  in  is  of  N2O  HF-HCIO^  leached  ionization  litharge,  button  a muffle  plus  neutron  irradiated  The added  is  resulting  thermal  digested  - ^2^2  with  effects 9  m : t X  a s  -  25 in  ml the  ture.  Method:  A 10 gm s a m p l e flux.  is  dryness.  % HC1 w i t h  10  A.A  gm s a m p l e  standard  flux. counted  carbonate  containing  furnace  and  to  blank  any  T h e gamma e m i s s i o n s utilizing  The d e t e c t i o n  a  limit  gold  produce  beads  Ge  and  a  are of  silicious  in  precious  irradiated the  (Li) detector  for  a  the  and  10 gm s a m p l e  is  Page  C.2  K-Ar Analytical  The  following  Laboratory, performed K  in  is  Techtron Ar Mass  The  is  U n i v e r s i t y of  The  Rb  reported  Analytical  The  in  and  analysis  in  of  are  ppm  pressed  the  Columbia for  Geochronolgy analyses  atomic  absorption  using  a  one  precision  of  J  O  Ar  using  an  AE1 M S - 1 0  spike.  standard  were  deviation.  provided  British  concentrations powder rock  by  the  Columbia  for  were  standard  determined  using  standards  measurements. one  are  pellets  coefficients  scattering  dilution  Geochronolgy analyses  1984.  absorption  repectively).  for  U n i v e r s i t y of  Mass  a  by  Techniques  G e o l o g i c a l Survey  have  by  purity  techniques  August, Sr  isotope  high  U.S.  Compton  British  duplicate  by  and  following  performed  provided  1985.  determined  Laboratory,  were  spectrophotometer.  spectrometer  Rb-Sr  techniques  determined  Errors  C.3  Techniques  April,  AA4  206  X-ray  are  obtained Rb-Sr  deviation  for  from  (2  replicate  fluorescence.  used  ratios  by  calibration.  Mo K and  % and  alpha  concentrations 5 %  Page  Isotope 30  cm r a d i u s  desk  top  determinations solid  value of  and of  mass  performed  on  spectrometer  a  60  degree  automated  by  Sector, a  HP85  minicomputer.  Experimental 0.1194  source  are  207  data  are  recalculated  0 . 71 020+_2  and  normalized to  relative the  Eimer  to  the  and  an  D  Sr/  NBS S r C 0  Amend  3  SrCO-^  Sr  value  of  (SRM 987) standard  value  0.70800+2. ft 7 ft The  p r e c i s i o n of  deviation Rb-Sr  (.015 dates  a  single  Sr/  ft o  a  Sr  ratio  is  one  constant  of  1.42  standard  %). are  based  on a  decay  x10  —11  yr  -  

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