The metamorphism of the rocks of the Aldridge formation, Kimberley B.C
department or school: Science, Faculty of
department or school: Earth, Ocean and Atmospheric Sciences, Department of
data provider: DSpace
degree campus: UBCV
creator: Hoadley, John William
issued: 2012-03-22T21:33:27Z
issued: 1947
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: The area near the Sullivan Mine, Kimberley B.C., is underlain by rocks of the Purcell series which consist of two sedimentary formations of late Pre-Cambrian age, the Aldridge and the Creston. Both are composed of argillite, siltstone, and quartzite. The Sullivan ore body is a replacement deposit in certain favourable horizons in the Aldridge formation. The only known igneous rocks near the mine are the Purcell intrusives of late Pre-Cambrian age. These intrusives occur as large sheets, or sills, at a small angle to the bedding of the Purcell series.They are chemically about the same as gabbro. The object of this research was to determine the changes induced in the sedimentary rocks of the Aldridge formation near the Sullivan Mine by the intrusion of the Purcell sills; to compare the alterations found with the alterations known to be present in the wall rocks of the Sullivan ore body; and from this comparison, determine whether there is any justification for relating the mineralization of the Sullivan ore body to the intrusion of the Purcell sills. In order to obtain the information required the writer made a petrographic examination of thirty-six thin sections of specimens of the core of the Sullivan Diamond Drill Hole 249 located just east of the mine. The hole was drilled vertically through a sixty foot sill, and on into the underlying sediments of the Aldridge formation. The results obtained from this examination indicate that the sediments adjacent to the sill have been subjected to low grade thermal metamorphism, which has resulted in the development of a pronounced biotite spotted contact zone. Late magmatic emanations, either from the partially consolidated sill, or from the parent magma chamber caused metasomatism in the sedimentary rocks of the contact zone, and the effects of the metasomatic action are super imposed upon the effects of the thermal metamorphism. Tourmaline, albite, pyrrhotite, sphalerite, sphene and rutile are the main minerals produced by…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/41722
note: L C3 & J THE METAMORPHISM OF THE ROCKS OF THE f ALDRIDGE FORMATION KIMBERLEY, B.C. BY JOHN W. HOADLEY A THESIS SUBMITTED IK PARTIAL FULFILMENT OF THE.REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE IN THEf DEPARTMENT ,OF GEOLOGY AND GEOGRAPHY THE UNIVERSITY OF BRITISH COLUMBIA APRIL 1947 ACKNOWLEDGMENTS The w r i t e r acknowledges the as s i s t a n c e rendered by Drs. Gunning, Watson and Swans, on. The t e c h n i c a l .advice and as s i s t a n c e given by Mr. J.A. Donnan was i n v a l u a b l e . CONTENTS PAGE Abs t r a c t . : 1 I n t r o d u c t i o n 3 Object of the research 3 Part 1. L o c a t i o n and General Geology ; 5 Wall rock a l t e r a t i o n of the S u l l i v a n Ore Body .* 6 .Petrography of u n a l t e r e d sedimentary rocks 7 Part 2. -Minerals o c c u r r i n g i n the rocks of the A l d r i d g e Formation cut by d r i l l hole 249' ; 9 Part 3. A l t e r a t i o n of the' rocks of the A l d r i d g e Formation 15 General Statement . . . .• 15 D e s c r i p t i o n of the s p o t t i n g 15 V a r i a t i o n i n texture of the spots 16 B i o t i t e content and d i s t r i b u t i o n .'.. . 16 P y r r h o t i t e content 16 Tourmaline content 16 R u t i l e content 17 C l i n o z o i s i t e content 17 C h l o r i t i z a t i o n 17 Part 4. O r i g i n of New M i n e r a l s . • Formation of the b i o t i t e 18 O r i g i n of tourmaline and sulphides 20 O r i g i n of a l b i t e 22 O r i g i n of r u t i l e 24 Part 5. Conclusions 25 B i b l i o g r a p h y 27 Appendix ; 28 ILLUSTRATIONS PAGE Pl a t e 1. V e i n l e t of p y r r h o t i t e i n t h i n s e c t i o n 289A 53 2 . Lens of p y r r h o t i t e shown i n P l a t e 1 53" 3. Pronounced s p o t t i n g i n t h i n s e c t i o n 264A 54 4. Large spots i n t h i n section 340A. ." 54 5.. S i m i l a r to P l a t e 4 -• crossed N i c o l s 55 6. Tourmaline aggregates i n t h i n s e c t i o n 160B-' low power-. 55 7. Tourmaline aggregates i n t h i n s e c t i o n 160B- ' …
has type: Thesis/Dissertation
is shown at: 10.14288/1.0053535
language: eng
degree discipline: Geological Sciences
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/41722