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TitleTextural and mineralogical characterization of a Ni-Zn-rich black shale occurrence at the Akie property, Kechika Trough, northern British Columbia, and comparison with examples from Yukon
DownloadDownload (whole publication)
AuthorPeter, J M; Bocking, N; Gadd, M G; Layton-Matthews, D; Johnson, N
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 207-216, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Geological Survey of Canada, Open File 8358
File formatpdf
ProvinceBritish Columbia; Yukon
NTS94E; 94F; 94G; 94I; 94J; 94K; 94L; 94M; 94N; 94O; 94P; 95; 96B; 96C; 96D; 96E; 96F; 96L; 104I; 104O; 104P; 105; 106A; 106B; 106C; 106D; 106E; 106F; 106G; 106H; 106I; 106J; 106K; 106L; 115I; 115N; 115O; 115P; 116A; 116B; 116C; 116F; 116G; 116H; 116I; 116J; 116K
AreaGataga District; Peel River
Lat/Long WENS-141.0000 -120.0000 67.0000 57.0000
Subjectseconomic geology; mineralogy; stratigraphy; geochemistry; mineral deposits; mineral exploration; mineral potential; metals; nickel; zinc; molybdenum; sulphides; sedimentary ore deposits; stratiform deposits; ore mineral genesis; mineralization; ore controls; sedimentary basins; geological history; tectonic history; bedrock geology; lithology; sedimentary rocks; shales; black shales; carbonates; limestones; siltstones; debris flow deposits; igneous rocks; volcanic rocks; clasts; structural features; faults; faults, thrust; folds; anticlines; synclines; lineaments; drillholes; textural analyses; thin section microscopy; scanning electron microscope analyses; bulk composition; Kechika Trough; Selwyn Basin; Akie Deposit; Richardson Trough; Mackenzie Platform; Nick Deposit; Peel River Deposit; Eagle Plains Deposit; Monster River Deposit; Cardiac Creek Deposit; Ancestral North America; Earn Group; Warneford Formation; Akie Formation; Gunsteel Formation; Road River Group; Kechika Group; ore systems approach; hyper-enriched black shale (HEBS) deposits; mineral liberation analysis (MLA); Phanerozoic; Paleozoic; Devonian; Silurian; Ordovician; Cambrian
Illustrationsgeoscientific sketch maps; schematic cross-sections; photographs; photomicrographs
ProgramTargeted Geoscience Initiative (TGI-5), Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5), Volcanic and sedimentary systems
Released2018 01 19
AbstractHyper-enriched black shales (HEBS) that are enriched in Ni, Zn, Mo, and other elements occur within the Devonian strata of Yukon over 100s to 1000s km2. The mineralization is typically up to several tens of centimetres thick. Recently, during exploration for SEDEX deposits, mineralization that is potentially analogous (and time-stratigraphically equivalent) to HEBS mineralization in Yukon was discovered in the Kechika Trough of northeastern British Columbia. Here, about 3 to 20 m stratigraphically below the SEDEX mineralization of the Cardiac Creek deposit, an approximately 2 to 20 cm thick stratiform horizon hosts sphalerite, chalcopyrite, millerite, gersdorffite, clausthalite, pentlandite and pyrite within Devonian black, carbonaceous shale. This mineralization is strikingly similar in broad stratigraphic age, metal enrichments, textures and mineralogy to HEBS localities in Yukon. Based on these similarities, this mineralization likely was formed at a discrete time interval, over a wide area (likely 1000s km2) within the Selwyn Basin and the adjacent carbonate platform. This has implications for any genetic and exploration model(s) for this style of mineralization.