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TitleMafic intrusive rocks from the Bird River intrusive suite, Bird River greenstone belt, southeast Manitoba
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBécu, V; Houlé, M G; McNicoll, V J; Yang, E M; Gilbert, H P
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. 49-60, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
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
NTS52L/05; 52L/12
AreaBird River
Lat/Long WENS -96.0000 -95.5000 50.7500 50.3333
Subjectsmetallic minerals; igneous and metamorphic petrology; geochemistry; geochronology; modelling; nickel; platinum; chromium; ore mineral genesis; metallogeny; mafic rocks; intrusive rocks; mafic intrusive rocks; lithology; chromite; whole rock geochemistry; whole rock analyses; uranium lead dates; zircon dates; Bird River Greenstone Belt; Superior Province; Coppermine Bay Intrusion; Euclid Lake Intrusion; Mayville Intrusion
ProgramTargeted Geoscience Initiative (TGI-4) Mafic-Ultramafic Ore Systems
Released2015 06 22; 2023 03 17
AbstractThis study presents new field, petrographic, and geochemical observations for the Coppermine Bay and Euclid Lake intrusions of the Bird River greenstone belt, allowing for comparison with the Mayville and other Bird River sill intrusions in southeast Manitoba. The mafic-dominated Coppermine Bay intrusion, located in the westernmost part of the southern arm of the Bird River greenstone belt, is texturally and petrographically similar to the mafic part of the mafic-ultramafic Euclid Lake intrusion, located 34 km to the northeast, at the northeast margin of the belts northern arm. The mafic components of the Coppermine Bay and Euclid Lake intrusions possess textural, compositional, and geochemical similarities with the Mayville and with mafic parts of other Bird River sill intrusions. Combined with geochemical and geochronological investigations, a petrogenetic linkage of these mafic-ultramafic intrusions is proposed through a widespread Neaoarchean Bird River magmatic event at ca. 2743 Ma, referred to as the Bird River intrusive suite. TiO2 and Zr contents, as well as rare earth elements profiles and plagioclase chemistry, may be useful geochemical tools to successfully discriminate and identify potentially fertile intrusions beyond traditionally
explored sectors in the Bird River greenstone belt.
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.

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