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TitleNew U-Pb geochronology from the Blake River Group, Abitibi Subprovince,Québec: Implications for geological interpretations and base metal exploration
AuthorMcNicoll, V; Goutier, J; Dubé, B; Mercier-Langevin, P; Ross, P; Dion, C; Monecke, T; Percival, J
SourceGeological Association of Canada-Mineralogical Association of Canada, Joint Annual Meeting, Programs with Abstracts vol. 34, 2011 p. 139
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20130571
Meeting2011 GAC-MAC-SEG-SGA Joint Annual Meeting; Ottawa; CA; May 25-27, 2011
Mediapaper; on-line; digital
File formatpdf
ProvinceQuebec; Ontario
Lat/Long WENS -80.0000 -78.5000 49.0000 48.0000
Subjectsgeochronology; metallic minerals; uranium lead dates; volcanic rocks; mineral deposits; mineralization; Archean; volcanic rocks; plutonic rocks; volcanogenic deposits; sulphide deposits; Blake River Group; Abitibi greenstone belt; Horne mine; Quemont deposit; Fabie deposit; Millenbach mine; Amulet mine; Bousquet Formation; LaRonde Penna mine; Bousquet 2-Dumagami deposit; Precambrian
ProgramGold Ore Systems, Targeted Geoscience Initiative (TGI-4)
ProgramGold Ore Systems, Targeted Geoscience Initiative (TGI-4)
AbstractThe 2704-2695 Ma Blake River Group forms part of the Abitibi Subprovince of the Superior Province. The submarine volcanic rocks of this group are host to a number of volcanogenic massive sulphide (VMS) deposits, including several world-class deposits. Nineteen new high precision U-Pb ages contribute to a high level of understanding of the time evolution of the Blake River Group and demonstrate that VMS deposits formed throughout the protracted volcanic evolution of the entire group. Important mineralizing events in the Blake River Group occur on the order of 2 m.y. and appear to be related to major magmatic episodes. The Blake River Group is host to the two largest Archean Au-rich VMS deposits (Horne and LaRonde Penna) and the large Bouchard- Hebert/Mobrun VMS deposit. These large deposits were formed during three distinct time periods (2702 Ma Horne-Quemont, 2698-2697 Ma LaRonde-Bousquet, and 2696 Ma Bouchard- Hebert/Mobrun). Age constraints on the timing of various mineralizing events contribute to better understanding the geometry of the Blake River Group and its geologic and metallogenic evolution. Recognizing the specific time-stratigraphic intervals favourable for mineralization and the associated geological settings are important aspects of future exploration models for these polymetallic deposits in the Blake River Group.