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TitleGeodynamic influences on the genesis of Archean world-class gold-rich VMS deposits: examples from the Blake River Group, Abitibi greenstone belt, Canada
AuthorMercier-Langevin, P; Hannington, P; Dubé, B; McNicoll, V; Goutier, J; Monecke, T
SourceLet's talk Ore Deposits - Proceedings of the Eleventh Biennal SGA Meeting; 2011 p. 85-87
LinksOnline - En ligne
Year2011
Alt SeriesEarth Sciences Sector, Contribution Series 20130545
MeetingEleventh Biennal SGA Meeting; Antofagasta; CL; September, 2011
Documentbook
Lang.English
Mediapaper; on-line; digital
ProvinceQuebec
NTS32D/03NE; 32D/06; 32D/07
AreaRouyn Noranda; Lac Chassignolle; Malartic
Lat/Long WENS -79.5000 -78.5000 48.5000 48.1667
Subjectseconomic geology; igneous and metamorphic petrology; mineral occurrences; mineral deposits; mineral potential; mineralization; gold; volcanogenic deposits; sulphides; sulphide deposits; lithogeochemistry; greenstone belts; greenstones; igneous rocks; volcanic rocks; tholeiites; basalts; andesites; lithostratigraphy; Archean; Abitibi Greenstone Belt; Laronde Penna Deposit; Blake River Group; Bousquet Deposit; Doyon Deposit; Precambrian; Proterozoic
ProgramVolcanogenic Massive Sulfide Ore Systems, Targeted Geoscience Initiative (TGI-4)
AbstractThe Archean gold-rich VMS deposits of the Abitibi greenstone belt occupy a stratigraphic position and volcanic setting that differs from other base metalbearing VMS deposits in the belt in terms of interpreted tectonic setting and evolving geodynamic architecture in the inferred arc?back-arc?style environment. Specifically, the first gold-rich VMS-forming episode was related to early extension-subsidence and major transitional felsic volcanism in the central part of the Blake River group at about 2702-2701 Ma. Extension and associated transitional to calc-alkaline migrated eastward to form the gold-rich VMS deposits of the Doyon-Bousquet-LaRonde camp at 2698-2697 Ma, at which time the Cu-Zn deposits of the Noranda Mine Sequence were being deposited in the more mature, tholeiitic to transitional mafic-dominated extensional setting. Defining the specific timestratigraphic intervals, the geological settings and the footprint of the gold-rich VMS deposits of the Abitibi are key aspects of exploration models for these valuable polymetallic deposits.
GEOSCAN ID296015