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TitleA geological, petrological, and geochronological study of the Grey Gabbro unit of the Podolsky Cu-(Ni)-PGE deposit, Sudbury, Ontario, with a focus on the alteration related to the formation of sharp-walled chalcopyrite veins
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKontak, D J; MacInnis, L M; Ames, D EORCID logo; Rayner, N MORCID logo; Joyce, N
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. 287-301, https://doi.org/10.4095/296696 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
ProvinceOntario
NTS41I
AreaSudbury
Lat/Long WENS -82.0000 -80.0000 47.0000 46.0000
Subjectsmetallic minerals; igneous and metamorphic petrology; geochronology; modelling; nickel; platinum; chromium; ore mineral genesis; metallogeny; alteration; chalcopyrite; sulphides; mineralization; copper; argon argon dates; zircon dates; uranium lead dates; gabbros; stable isotope studies; rubidium-strontium ratios; hydrothermal alteration; lead lead dates; petrographic analyses; Podolsky deposit; Superior Province; Sudbury Igneous Complex
ProgramTargeted Geoscience Initiative (TGI-4) Mafic-Ultramafic Ore Systems
Released2015 06 22
AbstractThe Canadian Ni-Cu-PGE-Cr ore systems project, under the fourth phase of the Targeted Geoscience Initiative (TGI-4), spanned a breadth of ore deposit types, tectonic environments (crustal boundaries, suprasubduction zones, astrobleme, intracratonic rift), and processes of formation (magmatic to hydrothermal). This report summarizes key project activities for six mineral districts completed by a collaborative group of more than fifty contributors from the GSC, four provincial geological surveys, academia, and industry to develop and refine genetic models and exploration techniques to determine fertility and pathfinders. Sixty-six new age determinations provide important geochronological constraints to build and refine models for many Cr-(PGE), Ni-Cu-PGE, Cu-PGE, and Fe-Ti-V-(P) prospective and fertile regions. These include Ni-Cu-PGE in convergent-margin settings, Cr in the Bird River and McFaulds Lake ("Ring of Fire") greenstone belts, Cr in La Grande Rivière-Eastmain domains, Cu-PGE in Midcontinent Rift, and Ni-Cu-PGE in the enormous Sudbury mining district. New exploration techniques to detect fertility using advanced mineral chemical microanalytical techniques and discriminant diagrams were developed for oxide phases (chromite, magnetite) in barren and fertile intrusions through examination of Canada's districts (Sudbury Igneous Complex, Ontario; Voisey's Bay, Labrador and Newfoundland) and Archean komatiite (Alexo, Abitibi). The first in situ determination of actual ore-metal concentrations from an early trapped melt hosting a major mining district was completed. Various new indicator minerals and assemblages, such as apatite, biotite, and epidote-amphibole-titanite assemblages, were identified with distinctive chemistry to aid in vectoring towards buried Ni-Cu-PGE and Cu-PGE mineralization.
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 ID296696

 
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