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TitleGeology and petrography of selected carbonate-hosted Zn-Pb deposits of the southeastern Cordillera, British Columbia and Alberta
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AuthorDrage, N; Paradis, S
SourceGeological Survey of Canada, Open File 8410, 2018, 27 pages, https://doi.org/10.4095/311220
Year2018
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceBritish Columbia; Alberta
NTS82E; 82F; 82G; 82J; 82K; 82L; 82M; 82N; 82O
AreaRocky Mountains
Lat/Long WENS-120.0000 -114.0000 52.0000 49.0000
Subjectseconomic geology; regional geology; stratigraphy; structural geology; igneous and metamorphic petrology; mineralogy; tectonics; mineral deposits; sulphide deposits; metals; zinc; lead; mineralization; ore mineral genesis; ore controls; structural controls; paragenesis; depositional environment; tectonic setting; host rocks; bedrock geology; lithology; sedimentary rocks; dolostones; breccias; igneous rocks; intrusive rocks; volcanic rocks; sphalerite; galena; pyrite; structural features; faults; gangue minerals; dolomites; calcite; quartz; Canadian Cordillera; Foreland Belt; Monarch Deposit; Kicking Horse Deposit; Shag Deposit; Munroe Deposit; Oldman Deposit; Purcell Anticlinorium; Rocky Mountain Trench; Cathedral Escarpment; Ancestral North America; Spray River Group; Rocky Mountain Supergroup; Rundle Group; Mount Head Formation; Exshaw Formation; Banff Formation; Paliser Formation; Sassenach Formation; Fairholme Group; Cedared Formation; Burnais Formation; MacKay Group; Lewis Thrust; Misty Formation; Etherington Formation; Linvingstone Formation; Belly River Formation; Wapiabi Formation; Cardium Formation; Blackstone Formation; Blairmore Formation; Kootenay Group; Fernie Formation; carbonate-hosted deposits; mississippi valley type deposits; Phanerozoic; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian; Carboniferous; Pennsylvanian; Mississippian; Devonian; Ordovician; Cambrian
Illustrationslocation maps; geoscientific sketch maps; stratigraphic correlations; stratigraphic cross-sections; photographs; photomicrographs; charts
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramVolcanic and sedimentary systems, Targeted Geoscience Initiative (TGI-5)
Released2018 09 27
AbstractThe Monarch, Kicking Horse, Shag, Munroe, and Oldman carbonate-hosted, sulphide deposits of the southeastern Canadian Cordillera share many of the characteristics of Mississippi Valley-type deposits, such as stratabound lenses, pods, and disseminated sulphide minerals locally accompanied by breccia-vein systems. The deposits are hosted in dolostone located at major facies transitions between shallow-water carbonate platformal and deeper basinal rocks along the ancient Paleozoic margin of the Canadian Cordillera. They are associated with fault and breccia structures located nearby or along the platform-basin facies transition. The location and geometry of these deposits reflect the interplay between structures (i.e. deep-seated faults located at platform-basin transition) and lithologies (i.e. permeable and reactive stratigraphic units).
Sulphides, consisting of sphalerite, galena, and, to a lesser extent, pyrite, are present as fracture, breccia matrix, and vug-fillings, as well as replacement of dolostone host rock. Dolomite and calcite are the common gangue minerals. Quartz is present at three showings of the Shag deposit but is otherwise absent (except for trace amounts at Kicking Horse). Paragenesis is relatively simple and shares many features across the studied deposits. Generally, sulphide paragenesis starts with pyrite, followed by sphalerite and then galena.
Summary(Plain Language Summary, not published)
Geologic and petrographic descriptions are presented for five carbonate-hosted sulphide deposits, Monarch, Kicking Horse, Shag, Munroe, and Oldman, of the southeastern Canadian Cordillera. The deposits share many characteristics with Mississippi Valley-type deposits, such as stratabound lenses, pods, and disseminated sulphide minerals locally accompanied by breccia-vein systems. The deposits are hosted in dolostone located at major facies transitions between shallow water carbonate platformal and deeper basinal rocks along the Paleozoic margin of the Canadian Cordillera. They are associated with fault and breccia structures located nearby or along the platform-basin facies transition. Sulphides are present as fractures, breccias, vug-fillings, and replacement of dolostone host rock. They consist of sphalerite, galena, and lesser amounts of pyrite. Dolomite and calcite are the common gangue minerals. Paragenesis is relatively simple and shares many features across the studied deposits. Generally, sulphide paragenesis starts with pyrite, followed by sphalerite, then galena.
GEOSCAN ID311220