GEOSCAN Search Results: Fastlink


TitleMetallogeny of the Doyon-Bousquet-LaRonde Mining Camp, Abitibi Greenstone Belt, Quebec
AuthorMercier-Langevin, P; Dubé, B; Lafrance, B; Hannington, M; Galley, A; Moorhead, J; Gosselin, P
SourceMineral deposits of Canada: a synthesis of major deposit-types, district metallogeny, the evolution of geological provinces, and exploration methods; by Goodfellow, W D (ed.); Geological Association of Canada, Mineral Deposits Division, Special Publication no. 5, 2007 p. 673-701
Alt SeriesEarth Sciences Sector, Contribution Series 20060546
PublisherGeological Association of Canada, Mineral Deposits Division (St. John's, NL, Canada)
Mediapaper; DVD
RelatedThis publication is contained in Mineral deposits of Canada: a synthesis of major deposit-types, district metallogeny, the evolution of geological provinces, and exploration methods
File formatpdf
AreaAbitibi; Rouyn-Noranda
Lat/Long WENS -79.0000 -78.5000 48.5000 48.2500
Subjectseconomic geology; metallic minerals; mineral deposits; volcanogenic deposits; sulphides; mineral occurrences; mineral exploration; gold; base metals; base metal deposits; copper; zinc; silver; igneous rocks; volcanic rocks; intrusive rocks; gold origin; mineralization; Archean; metallogeny; hydrothermal alteration; Doyon-Bousquet-LaRonde Deposits; Bousquet Formation; Blake River Group; Abitibi Greenstone Belt; Precambrian
Illustrationssketch maps; photographs; tables; cross-sections; schematic models
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
ProgramConsolidating Canada's Geoscience Knowledge
AbstractThe Doyon-Bousquet-LaRonde (DBL) mining camp deposits are hosted by the volcanic and intrusive rocks of the 2701-2696 Ma Bousquet Formation located in the upper part of the 2703-2694 Ma Blake River Group in the Abitibi greenstone belt. Since the 1930s, mining has taken place at eight Au ± base metal deposits in the DBL camp for a cumulative production, at the end of 2005, of 67 million tonnes (Mt) of ore at 5.67 g/t Au (381 tonnes Au, or 12.3 Moz). The total production, reserves, and estimated resources amount to 133 Mt of ore at 5.23 g/t Au (694 t Au, or 22.3 Moz). Three main Au±Cu-Zn-Ag deposit types are recognized in the DBL mining camp: 1) Au-rich volcanogenic massive sulphide deposits (LaRonde Penna, Bousquet 2-Dumagami, Bousquet 1, Westwood, Ellison, Warrenmac); 2) epizonal 'intrusion-related' Au-Cu sulphide-rich vein systems (Doyon); and 3) shear zone-hosted ('orogenic') Au-Cu sulphiderich veins (Mouska, Mic Mac, Mooshla), which share some characteristics with the first two ore types. The origin of the Au in the DBL camp has been extensively debated in the past and three models have been proposed: synvolcanic or syngenetic, multi-stage, and syndeformation. In these models, Au in the volcanogenic massive sulphide (VMS) and sulphide-rich veins of the camp is considered to be 1) a primary component of the hydrothermal fluids at the origin of the VMS (synvolcanic model) and of the epizonal intrusion-related veins, or 2) in part structurally introduced within and in part remobilized from massive sulphides into high-strain zones (multi-stage model), or 3) of metamorphic origin (syndeformation model). Recent studies of the LaRonde Penna deposit and the Mooshla synvolcanic pluton-hosted vein systems, combined with the geological synthesis and reconstruction of the DBL mining camp geology, have provided further insights into the synvolcanic or syngenetic model for the introduction of the Au, highlighting the fact that deformation is not a prerequisite for the formation of Au±Cu-Zn-Ag, Doyon-Bousquet-LaRondetype deposits, as previously thought.

Date modified: