The telescoped silver-lead-zinc deposits of the contact group mineral claims, Cassiar district, 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: McDougall, James John
issued: 2012-02-29T00:06:23Z
issued: 1953
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: The regional geology of the McDame Area is described briefly and a detailed description of the "Contact Group" mineral claims within this area is presented. The "Contact" vein deposit described herein is apparently unique, as far as geological literature is concerned, in its primary mineral associations. This vein, in a contact-metamorphic environment, possesses the form and textural characteristics of a mesothermal deposit. Typical high, medium and low temperature minerals are present in relationships that suggest unbroken deposition in the vein and a genetic relation to both the associated intrusive and related pyrometasomatic deposits. The occurrence and origin of native sulfur, wad, and hydrocarbon in the vein are discussed. Alabandite (MnS), which is a common constituent, is classified, on grounds of ex-solution phenomena, as having crystallized at temperatures greater than those previously assigned to it. The role of manganese in this deposit is given special attention. The conclusion is reached that the Contact Vein was formed at shallow depth under conditions of high but rapidly falling temperature and locally high pressure. Accordingly, it illustrates telescoping within the mesothermal-pyrometasomatic range of physical conditions.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/41020
note: I THE TELESCOPED SILVER-LEAD-ZINC DEPOSITS of the CONTACT GROUP MINERAL CLAIMS, Cassiar D i s t r i c t , B.C. By James John McDougall A thesis submitted i n p a r t i a l f u l f i l m e n t of the requirements f o r the degree of Master of Science, i n the Department of Geology and Geography We accept this thesis as conforming to the standard required from candidates for the degree of Master of Science Members of the Department of Geology and Geography "The University of B r i t i s h Columbia A p r i l 1953 Abstract The regional geology of the McDame Area i s des-cribed b r i e f l y and a detailed description of the "Contact Group" mineral claims within this area i s presented. The "Contact" vein deposit described herein i s apparently unique, as far as geological l i t e r a t u r e i s concerned, i n i t s primary mineral associations. This vein, i n a contact-metamorphic environment, possesses the form and t e x t u r a l c h a r a c t e r i s t i c s of a mesothermal deposit. Typical high, medium and low temperature minerals are present i n relationships that suggest unbroken deposition i n the vein and a genetic r e l a t i o n to both the associated i n t r u s i v e and rela t e d pyrometasomatic deposits. The occurrence and o r i g i n of native s u l f u r , wad, and hydrocarbon i n the vein are discussed. Alabandite (MnS), which i s a common constituent, i s c l a s s i f i e d , on grounds of ex-solution phenomena, as having c r y s t a l l i z e d at temperatures greater than those previously assigned to i t . The role of manganese i n thi s deposit is given special attention. The conclusion i s reached that the Contact Vein was formed at shallow depth under conditions of high but rapidly f a l l i n g temperature and l o c a l l y high pressure. Accordingly, i t i l l u s t r a t e s telescoping within the mesothermal-pyrometasomatic range of physical conditions. T a b l e o f C o n t e n t s C h a p t e r 1 I n t r o d u c t i o n P a g e G e n e r…
has type: Thesis/Dissertation
is shown at: 10.14288/1.0053498
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/2429/41020