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TitleMinéralisations chromifères et nickélifères associées à la Suite mafique-ultramafique de Caumont dans le secteur de Nemiscau, Eeyou Istchee Baie-James, Québec, Canada
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorHoulé, M G; Bandyayera, D; Bécu, V; Bédard, M -P
SourceGeological Survey of Canada, Scientific Presentation 117, 2020, 1 sheet, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf
NTS32N/08; 32N/09; 32O/05; 32O/11; 32O/12; 32O/13; 32O/14
AreaEeyou-Istchee Baie-James
Lat/Long WENS -76.4178 -75.2717 51.8133 51.4181
Subjectseconomic geology; mineralogy; Science and Technology; Nature and Environment; mineral potential; mineral exploration; mineral deposits; nickel; chromium; chromite; magmatic deposits; stratiform deposits; sulphide deposits; ore mineral genesis; mineralization; ore controls; bedrock geology; lithology; igneous rocks; ultramafic rocks; volcanic rocks; mafic volcanic rocks; volcano-sedimentary strata; intrusive rocks; peridotites; dunites; pyroxenites; gabbros; tectonic setting; host rocks; intrusions; x-ray diffraction analyses; Archean; Suite Intrusive de Caumont; Superior Province; Sous-Province Nemiscau; Sous-Province La Grande; Intrusion du Lac des Montagnes; Groupe du Lac des Montagnes; Intrusion de Caumont; Intrusion de Levack; Gisement de Mountain Lake; Gisement de Nisk; platinum group elements; Precambrian
Illustrationslocation maps; geoscientific sketch maps; lithologic sections; photographs; tables
ProgramTargeted Geoscience Initiative (TGI-5) Nickel-copper-PGE-chromium systems
Released2020 09 18
Summary(Plain Language Summary, not published)
Mafic and ultramafic rocks are ubiquitous in the Eeyou Istchee James Bay territory, although their abundance is extremely variable from one area to another. These are relatively common in the Nemiscau area and are interpreted as part of Caumont's mafic and ultramafic intrusive suite. These units in this suite consist of a series of mafic and ultramafic intrusions oriented ENE-WSW within the volcano-sedimentary sequence of the Lac des Montagnes Group along the contact between the Nemiscau subprovince, to the south, and the La Grande, to the north, of the Superior Province. Ongoing work aims to better characterize the ultramafic to mafic intrusions of the Caumont Suite in order to constrain their petrological and geochemical affinities as well as the association between chromiferous and nickeliferous mineralizations observed in many of these intrusions. This new geological information will be critical in a comparative study of the Caumont suite with other intrusions in the Superior Province such as those present in the Ring of Fire area in northern Ontario.

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