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TitleProject Unit 13-002. Mineralogy, geochemistry and petrogenesis of nickel-copper-platinum group element mineralization in the Black Thor intrusive complex, McFaulds Lake greenstone belt, Ontario
AuthorFarhangi, N; Lesher, C M; Houlé, M G
SourceSummary of field work and other activities, 2013; by Ontario Geological Survey; Ontario Geological Survey, Open File Report 6290, 2013 p. 55.1-55.7 Open Access logo Open Access
LinksOGS OFR 6290 Online - En ligne (pdf, 204 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20130225
PublisherOntario Geological Survey
Mediapaper; on-line; digital
File formatpdf
NTS43D/16; 43E/01
AreaMcFaulds Lake
Lat/Long WENS -86.5000 -86.0000 53.2500 52.7500
Subjectsgeochemistry; mineralogy; igneous and metamorphic petrology; petrogenesis; geochemical analyses; nickel; copper; platinum; mineralization; mineralogical analyses; sulphide deposits; chromitites; textural analyses; geochemical analyses; cores; sperrylite; magmatic deposits; pyrrhotite; pentlandite; chalcopyrite; magnetite; breccias; McFaulds Lake greenstone belt; Black Thor intrusive complex; platinum group elements; Precambrian
ProgramTargeted Geoscience Initiative (TGI-4) Mafic-Ultramafic Ore Systems
AbstractThe Black Thor intrusive complex (BTIC) occurs within the McFaulds Lake greenstone belt (circa 2.7 to 2.8 Ga) in northern Ontario and comprises a lower ultramafic series of dunite and peridotite; a middle ultramafic series of dunite, peridotite and chromitite (Black Thor and Black Label horizons); and an upper ultramafic to mafic series of peridotite, olivine pyroxenite, pyroxenite, melagabbro, mesogabbro, leucogabbro and anorthosite. A late pyroxenite unit intruded the lower ultramafic series and parts of the middle ultramafic series (see Carson et al., this volume, Figures 52.1 and 52.2; see also Carson et al. 2013; Weston and Shinkle 2013). In addition to the world-class chromite deposits, several iron-nickel-copper sulphide occurrences, the focus of this study, occur within the BTIC. The majority of the mineralization occurs within the following 6 areas or zones: 1) "AT-12 extension" zone (within the feeder underlying the BTIC); 2) "Basal Contact" zone (along the contact between the BTIC and underlying granitoids; 3) "NW breccia" zone (magmatic breccia zone between the Basal Contact zone and the Black Label horizon along the western side of the complex); 4) "F2" zone (magmatic breccia zone near the Black Label horizon in the northern part of the complex); 5) Black Label chromitite zone; and 6) Black Thor chromitite zone (see Carson et al., this volume, Figure 52.2; Tuchscherer et al. 2010). (Unless noted otherwise, the olivine in all rocks has been serpentinized; all rocks have been metamorphosed, but the "meta" prefix on all rock names has been omitted for convenience and clarity.)
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. The purpose of this contribution is to present the main objectives, research methods, preliminary results, preliminary implications, and future work for this MSc study undertaken by N. Farhangi at Laurentian University. The topic of the study is Mineralogy, Geochemistry, and Petrogenesis of Ni-Cu-PGE Mineralization in the Black Thor Intrusive Complex, McFaulds Lake Greenstone Belt, Ontario

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