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TitleGenesis of hyper-enriched black shale Ni-Mo-Zn-Pt-Pd-Re mineralization in the northern Canadian Cordillera
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorGadd, M GORCID logo; Peter, J MORCID logo; Layton-Matthews, D
SourceTargeted Geoscience Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods; by Peter, J MORCID logo (ed.); Gadd, M GORCID logo (ed.); Geological Survey of Canada, Bulletin 617, 2022 p. 15-38, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods
RelatedNRCan photo(s) in this publication
File formatpdf
ProvinceYukon; British Columbia
NTS94C; 94F; 106C; 106D; 106E; 106F; 106K; 106L; 106M; 106N; 116
AreaYukon River; Ogilvie River; Porcupine River; Ogilvie Mountains
Lat/Long WENS-141.0000 -132.0000 67.0000 64.0000
Lat/Long WENS-126.0000 -124.0000 58.0000 56.0000
Subjectseconomic geology; geochemistry; sedimentology; geochronology; paleontology; stratigraphy; mineralogy; Science and Technology; Nature and Environment; Middle Devonian; mineral exploration; exploration guidelines; mineral deposits; sedimentary ore deposits; polymetallic ores; sulphide deposits; metals; nickel; molybdenum; zinc; platinum; palladium; gold; lead; zinc; silver; ore mineral genesis; mineralization; ore controls; syngenesis; diagenesis; sedimentation; eustatic submergence; continental margins; sedimentary basins; paleoenvironment; depositional environment; marine environments; sea water geochemistry; mass spectrometer analysis; geochemical analyses; host rocks; bedrock geology; lithology; sedimentary rocks; shales; ore grades; sulphides; pyrite; radiometric dating; biostratigraphy; micropaleontology; microfossils; conodonts; isotopic studies; sulphur; osmium; lithostratigraphy; lithogeochemistry; mineralogical analyses; Canadian Cordillera; Richardson Trough; Kechika Trough; Blackstone Trough; Monster River Showing; Nick Deposit; Peel River Deposit; Moss Deposit; Akie Property; Canol Formation; Road River Group; Yukon Block; platinum group elements; Phanerozoic; Paleozoic; Devonian
Illustrationsgeoscientific sketch maps; tables; lithologic sections; photographs; profiles; photomicrographs; plots; schematic representations
ProgramTargeted Geoscience Initiative (TGI-5) Volcanic and sedimentary systems - volcanogenic massive sulphide ore systems
Released2022 01 27; 2022 11 17
AbstractPolymetallic (Ni-Mo-Zn-Pt-Pd-Au-Re) hyper-enriched black shales in the northern Canadian Cordillera consist of thin, semi-massive sulfides interbedded with black shale. We studied HEBS deposits at Nick, Peel River, Monster River, and Moss in northern Yukon, and at a single locality underlying the Cardiac Creek Pb-Zn-Ag deposit in northeastern British Columbia. High-grade mineralization contains up to 7.4 weight per cent Ni, 2.7 weight per cent Zn, 0.38 weight per cent Mo, 400 ppb Pt, 250 ppb Pd, 160 ppb Au, and 58.5 ppm Re. Sulfide mineralization formed during syngenesis to later diagenesis. Analyses by LA-ICP-MS indicate that pyrite is the principal host of platinum-group elements, Au, and Re. Mineralization and sedimentation were coeval based on the overlap between Re-Os geochronology of HEBS at Nick and Peel River (390.7 ± 5.1 and 387.3 ± 4.4 Ma, respectively) and conodont biostratigraphic ages of sedimentary host rocks. Bulk S isotope composition of HEBS is uniformly negative, indicating that bacterial reduction of seawater sulfate generated sulfur to precipitate sulfide minerals. The initial Os ratios at Peel River (0.25 ± 0.07) and Nick (0.32 ± 0.20) overlap with Middle Devonian seawater, suggesting that elemental enrichment was derived from seawater.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This contribution summarizes the results of a 5-year study of multiple mineral deposit types: polymetallic hyper-enriched black shale; sedimentary exhalative Pb-Zn; carbonate-hosted Pb-Zn, magnesite; fracture-controlled replacement Zn-Pb, rare-earth element-F-Ba; and volcanogenic massive sulfides. Studies employed field geology, combined with geochemical (lithogeochemistry, stable and radiogenic isotopes, fluid inclusions, and mineral chemistry) and geophysical (rock properties, magnetotelluric, and seismic) methods. Collectively, the research provides advanced genetic and exploration models for volcanic- and sedimentary-hosted base-metal deposits, together with new laboratory, geophysical, and field techniques.

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