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TitreGeodynamic influences on the genesis of Archean world-class gold-rich VMS deposits: examples from the Blake River Group, Abitibi greenstone belt, Canada
AuteurMercier-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
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20130545
RéunionEleventh Biennal SGA Meeting; Antofagasta; CL; Septembre, 2011
Documentlivre
Lang.anglais
Mediapapier; en ligne; numérique
ProvinceQuébec
SNRC32D/03NE; 32D/06; 32D/07
Lat/Long OENS -79.5000 -78.5000 48.5000 48.1667
Sujetsgîtes minéralogiques; gisements minéraux; potentiel minier; minéralisation; or; gîtes volcanogènes; sulfures; gîtes sulfureux; lithogéochimie; ceintures de roche verte; roches vertes; roches ignées; roches volcaniques; tholéiites; basaltes; andésites; lithostratigraphie; Archéen; Ceinture d'Abitibi Greenstone ; Dépôt de Laronde Penna ; Groupe de Blake River ; Dépôt de Bousquet ; Dépôt de Doyon ; géologie économique; pétrologie ignée et métamorphique; Précambrien; Protérozoïque
ProgrammeÉtude des gîtes de sulfures massifs volcaniques, Initiative géoscientifique ciblée (IGC-4)
LiensOnline - En ligne
Résumé(disponible en anglais seulement)
The 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