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TitleInsights into the timing of mineralization and metamorphism in the North Caribou greenstone belt, western Superior Province
DownloadDownload (whole publication)
AuthorKelly, C J; Schneider, D A
SourceTargeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration; by Dubé, B (ed.); Mercier-Langevin, P (ed.); Geological Survey of Canada, Open File 7852, 2015 p. 245-253, https://doi.org/10.4095/296645 (Open Access)
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Dubé, B; Mercier-Langevin, P; (2015). Targeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration, Geological Survey of Canada, Open File 7852
File formatpdf
ProvinceOntario
NTS52O; 53B
AreaNorth Caribou Lake
Lat/Long WENS -92.0000 -90.0000 53.0000 51.0000
Subjectseconomic geology; geochronology; Archean; gold; mineralization; mineral occurrences; metamorphism; greenstone belts; spectrometric analyses; North Caribou Greenstone Belt; Superior Province; Precambrian
Illustrationstables; plots
ProgramGold Ore Systems, Targeted Geoscience Initiative (TGI-4)
Released2015 06 11
AbstractSecondary ion mass spectrometry (SIMS) U-Pb depth profiles of unpolished detrital zircon were used in an attempt to resolve the timing of metamorphism and mineralization in the North Caribou greenstone belt of northern Ontario, which hosts the Musselwhite gold mine. Eleven samples located 10-75 km from the mine site were collected from metasedimentary rocks adjacent to structures that may have promoted hydrothermal fluid flow. Zircon rim material is commonly characterized by decreased Th/U concentrations (up to an order of magnitude), as well as generally possessing concordant ages. Rim ages obtained via this technique range from 2788-2703 Ma, up to 250 m.y. younger than zircon cores. The timing of zircon rim recrystallization overlaps with the timing of potassic alteration in the surrounding plutons, as well as regional gold mineralization in the North Caribou Superterrane. These zircon rims may represent the timing and potential distribution of Au-bearing fluids within and regional to the Musselwhite deposit.
GEOSCAN ID296645