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TitleIOCG environments in Canada: Characteristics and geological vectors to ore
AuthorCorriveau, L; Mumin, H; Setterfield, T
SourceSmart Science for Exploration and Mining, proceedings of the Tenth Biennial SGA Meeting; by Williams, P J (ed.); Rusk, B (ed.); vol. 2, 2009 p. 620-622
LinksOnline - En ligne
Year2009
Alt SeriesEarth Sciences Sector, Contribution Series 20120052
MeetingTenth Biennial SGA Meeting; Townsville; AU; August 17-20, 2009
Documentbook
Lang.English
Mediapaper
ProvinceBritish Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 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 WENS-141.0000 -50.0000 90.0000 41.7500
Subjectseconomic geology; tectonics; mineral deposits; mineral occurrences; iron oxides; copper; gold; tectonic setting; tectonic interpretations; mineralization; alteration; hydrothermal alteration; Great Bear Magmatic Zone; Central Mineral Belt; Cobequid-Chedabucto Fault Zone
Illustrationslocation maps
ProgramIron-oxide Copper-gold (IOCG) / Multiple Metals - Great Bear Lake (NWT), GEM: Geo-mapping for Energy and Minerals
AbstractProspective 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