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TitleMagmatic Ni-Cu-PGE sulphide deposits at convergent margins
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorNixon, G T; Manor, M J; Jackson-Brown, S; Scoates, J S; Ames, D EORCID logo
SourceTargeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models; by Ames, D EORCID logo (ed.); Houlé, M G (ed.); Geological Survey of Canada, Open File 7856, 2015 p. 17-34, https://doi.org/10.4095/296676 Open Access logo Open Access
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models
File formatpdf
ProvinceBritish Columbia
NTS92H; 104I
AreaHope; Turnagain River
Lat/Long WENS-122.0000 -120.0000 50.0000 49.0000
Lat/Long WENS-130.0000 -128.0000 59.0000 58.0000
Subjectsmetallic minerals; igneous and metamorphic petrology; modelling; nickel; platinum; chromium; ore mineral genesis; metallogeny; mineralization; sulphides; alaskan-type ultramafic complex; ultramafic rocks; Giant Mascot mine; Turnagain intrusion; Paleozoic; Cretaceous
ProgramTargeted Geoscience Initiative (TGI-4) Mafic-Ultramafic Ore Systems
Released2015 06 22
AbstractMagmatic Ni-Cu-PGE sulphide deposits hosted by ultramafic-mafic intrusions in convergent-margin tectonic settings are an increasingly important resource worldwide, yet remain poorly understood and underexplored. A compilation of global mineralized intrusions in subduction-related settings underscores their economic potential and reveals mineralogical differences that may reflect parental magma composition and ore-forming processes. Our geochemical and isotopic investigations of two mineralized ultramafic intrusions in the Cordillera, the orthopyroxene-absent Turnagain Alaskan-type intrusion and the orthopyroxenerich Giant Mascot intrusion, emphasize (1) the importance of wall-rock assimilation in promoting sulphide saturation and formation of an immiscible sulphide liquid; and (2) the ability of narrow conduit systems to channel influxes of new metal-laden magma and serve as traps for the collection of upgraded Ni-Cu-PGE sulphides. Processes fundamental to the production of economic Ni-sulphide deposits in the oxidized and hydrous primitive magmas generated at subduction zones are similar to those that have produced worldclass magmatic nickel deposits in other tectonic settings.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI-4) 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 volume summarizes 22 research activities completed under the TGI-4 Ni-Cu-PGE-Cr ore systems project that focused on revised and new geologic models for Ni-Cu-PGE, PGE-Cu and Cr deposits, innovative techniques for determining potential fertility of intrusion (Ni-Cu-PGE), and defining pathfinders for Ni-Cu-PGE mineralization.
GEOSCAN ID296676

 
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