| Title | Geochemical evidence for a magmatic contribution to the metal budget of the Windy Craggy Cu-Co(±Zn) volcanogenic massive-sulfide deposit, northwestern British Columbia |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Leybourne, M I; Peter, J M ; Schmidt, M A; Layton-Matthews, D; Voinot, A; Mathieu, L |
| Source | Targeted Geoscience Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods; by Peter, J M (ed.); Gadd, M G (ed.); Geological Survey of Canada, Bulletin 617, 2022 p. 287-312, https://doi.org/10.4095/328018
 Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods |
| File format | pdf |
| Province | British Columbia |
| NTS | 114P/02 |
| Area | Windy Craggy Mountain |
| Lat/Long WENS | -137.7833 -137.7461 59.7375 59.7208 |
| Subjects | economic geology; geochemistry; tectonics; Science and Technology; Nature and Environment; Upper Triassic; mineral exploration; exploration guidelines; mineral deposits; volcanogenic deposits; sulphide
deposits; metals; copper; cobalt; zinc; gold; ore mineral genesis; mineralization; ore controls; fluid dynamics; fluid inclusions; sulphides; pyrite; chalcopyrite; pyrrhotite; whole rock geochemistry; geochemical analyses; mass spectrometer analysis;
trace element analyses; lithogeochemistry; host rocks; bedrock geology; lithology; igneous rocks; volcanic rocks; mafic volcanic rocks; basalts; andesites; mafic intrusive rocks; sedimentary rocks; argillites; structural features; faults; tectonic
history; magmatism; hydrothermal systems; alteration; intrusions; dykes; sills; Windy Craggy Deposit; Tats Group; Alexander Terrane; Canadian Cordillera; Data processing; Phanerozoic; Mesozoic; Triassic |
| Illustrations | location maps; geoscientific sketch maps; stratigraphic columns; tables; plots; ternary diagrams; histograms |
| Program | Targeted Geoscience Initiative (TGI-5) Volcanic and sedimentary systems - volcanogenic massive sulphide ore systems |
| Released | 2022 01 27; 2022 11 17 |
| Abstract | Volcanogenic massive-sulfide (VMS) deposits may have had metal contributions from magmatic degassing and leaching of footwall rocks. The Windy Craggy Cu-Co-Zn VMS deposit in northwestern British
Columbia may include magmatic contributions, based on laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of fluid inclusions (enriched in Sb, Sn, and Bi) and lithogeochemistry. Sulfide-mineral trace-element abundances in the
massive-sulfide orebody, underlying stockwork zone, gold zone, and altered and unaltered mafic rock and argillite were analyzed by LA-ICP-MS. Elevated Au, W, As, Bi, Sb, Se, Te, Tl, Ag, Co, and Mo contents occur within the gold and/or stockwork
zones. Increasing 'magmatic metals' with increasing Co/Ni values suggest direct magmatic contribution to the deposit. Covariation of Co with these so-called 'magmatic elements' indicates that it, too, may be of magmatic origin, sourced via fluids
exsolved from a crystallizing magma; however, evidence from the composition of rocks and sulfide minerals from Windy Craggy and other VMS deposits suggests that there is probably no meaningful distinction between hydrothermal leaching and direct
magmatic contributions and that most - if not all - fluids that form VMS deposits should be termed 'magmatic-hydrothermal'. |
| 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. |
| GEOSCAN ID | 328018 |
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