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TitleProject Unit 13-002. Stratigraphy, geochemistry and petrogenesis of the Black Label chromite horizon, Black Thor intrusive complex, McFaulds Lake greenstone belt, Ontario
AuthorMehrmanesh, K; Carson, H J E; 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. 53.1-53.6 Open Access logo Open Access
LinksOGS OFR 6290 Online - En ligne (pdf, 204 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20130223
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
Subjectsigneous and metamorphic petrology; metallic minerals; petrogenesis; intrusive rocks; ultramafic rocks; dunites; peridotites; pyroxenites; gabbros; cores; petrographic analyses; lithology; chromite; textural analyses; McFaulds Lake greenstone belt; Black Thor intrusive complex; Black Label deposit; Precambrian
ProgramTargeted Geoscience Initiative (TGI-4) Mafic-Ultramafic Ore Systems
AbstractThe Black Thor intrusive complex 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; and an upper ultramafic to mafic series of peridotite, olivine pyroxenite, pyroxenite, melagabbro, mesogabbro, leucogabbro and anorthosite; the lower and middle series are intruded by a late pyroxenite (see Carson et al., this volume, Figures 52.1 and 52.2; see also Carson et al. 2013; Weston and Shinkle 2013). The Black Thor intrusive complex hosts 2 major chromite deposits, the Black Label and the Black Thor horizons, which are similar in many respects. The Black Label deposit-the focus of this study-has been disrupted in the central parts by a late pyroxenite body (see Spath, Lesher and Houlé, this volume, Article 54), but appears to have been originally more discontinuous than the Black Thor deposit. (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.)
The purpose of this article is to present the main objectives, research methods, preliminary results and the future work for an MSc thesis study undertaken by K. Mehrmanesh at Laurentian University. This ongoing project is supported by Cliffs Natural Resources, the Natural Sciences and Engineering Research Council of Canada (NSERC) Collaborative Research and Development Program, the Ontario Geological Survey (OGS), and the Targeted Geoscience Initiative 4 (TGI-4) of the Geological Survey of Canada (GSC), which is part of the Earth Sciences Sector of Natural Resources Canada.
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 K. Mehrmanesh at Laurentian University. The topic of the study is stratigraphy, geochemistry, and petrogenesis of the Black Label Chromitite Horizon within the Black Thor Intrusive Complex, McFaulds Lake Greenstone Belt, Ontario

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