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TitreIOCG environments in Canada: Characteristics and geological vectors to ore
AuteurCorriveau, L; Mumin, H; Setterfield, T
SourceSmart Science for Exploration and Mining, proceedings of the Tenth Biennial SGA Meeting; par Williams, P J (éd.); Rusk, B (éd.); vol. 2, 2009 p. 620-622
LiensOnline - En ligne
Année2009
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120052
RéunionTenth Biennial SGA Meeting; Townsville; AU; août 17-20, 2009
Documentlivre
Lang.anglais
Mediapapier
ProvinceColombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut
SNRC1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long OENS-141.0000 -50.0000 90.0000 41.7500
Sujetsgisements minéraux; gîtes minéralogiques; oxydes de fer; cuivre; or; cadre tectonique; interprétations tectoniques; minéralisation; altération; altération hydrothermale; Zone de Great Bear Magmatic ; Ceinture de Central Mineral ; Zone de faille de Cobequid-chedabucto ; géologie économique; tectonique
Illustrationslocation maps
ProgrammeGisements polymétalliques - Zone magmatique du Grand lac de l'Ours (T.N-O.), GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
Prospective geological environments for polymetallic iron-oxide copper-gold (IOCG) deposits in Canada are currently most common in Proterozoic settings but Phanerozoic examples occur within the Appalachian Orogen and the Cordillera, and Archean examples are starting to be discovered. All examples outcrop. The Great Bear Magmatic Zone displays superb glacially-polished cross-sectional exposures of both magnetite-group and hematite-group IOCG systems; the Wernecke Breccias offer a 3D perspective on such systems; and crustal-scale fault control and the polyphase build-up of IOCG systems through orogenesis is exemplified by the Cobequid-Chedabucto Fault Zone and the Central Mineral Belt. Exposures within the Great Bear systems record many of the processes required to form giant uranium-rich IOCG deposits: 1) regional- to deposit-scale wholesale element mobility driven by significant thermal anomalies, 2) repeated and focussed trapping and precipitation of metals within key structural and lithological traps, and 3) superimposition of hematite-bearing alteration on magnetite ones. Varied mineralization styles arose from coalescing hydrothermal cells where potent and polyphase fluid-rock interaction led to an extraordinary range of IOCG deposits and to continuum with porphyry and epithermal systems.
GEOSCAN ID291421