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TitleExploring for iron oxide copper-gold (Ag-Bi-Co-U) deposits: case examples, classification and exploration vectors
AuthorCorriveau, L; Mumin, H
SourceExploring for iron oxide copper-gold deposits: Canada and global analogues; by Corriveau, L (ed.); Mumin, H (ed.); Geological Association of Canada, Short Course Notes no. 20, 2010 p. 1-12
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20090320
Mediapaper; on-line; digital
File formatpdf
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-180.0000 180.0000 90.0000 -90.0000
Subjectseconomic geology; mineral deposits; mineral occurrences; iron oxides; gold; copper; exploration; mineral exploration; hydrothermal deposits; alteration; hydrothermal alteration
Illustrationslocation maps; tables; photographs
ProgramGEM: Geo-mapping for Energy and Minerals, Iron-oxide Copper-gold (IOCG) / Multiple Metals - Great Bear Lake (NWT)
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
ProgramSecure Canadian Energy Supply
AbstractIron oxide copper-gold deposits are sulphide-deficient hydrothermal deposits where iron oxide-rich and other fertile alteration types contain economic quantities of copper and/or gold with or without Ag, Co, Bi, Fe, Mo, Ni, PGE, Pb, REE, U, V, Zn and industrial mineral by products. Ore zones are part of regional-scale hydrothermal alteration systems rich in iron oxide and other fertile mineral assemblages that can chemically and texturally modify host rocks beyond recognition of protoliths over tens of kilometres. The nature and systemic evolution of these alteration zones provide a framework for the development of alteration to mineralization zoning models that puts into perspective the interrelationships among iron oxide-apatite deposits and magnetite- to hematite-group IOCG deposits. Due to the extraordinary range and intrinsic complexity of IOCG and affiliated deposits, IOCG environments present one of the most challenging targets for explorers and researchers in economic geology. That host terranes are commonly seriously under explored and under mapped present challenges and opportunities; resources if present are still largely untapped. This, with the combined potential for base, precious, rare earth, strategic and nuclear metals, the potentially high resources, and the clustering of deposits within districts that line up along laterally extensive geological provinces, make the deposit type very attractive for modern exploration and for more robust mining and exploration investments. This short course volume addresses critical issues in exploring for these deposits, provides case studies of reference deposits worldwide, and frames the diagnostic alteration types, paragenetic sequence, structural controls, and geophysical and geochemical signatures into zoning models, deposit classification and vectors for mineralization. Representative field examples and rock samples from stunning exposures of IOCG deposits and hydrothermal systems in the Great Bear Magmatic Zone (Canada) and worldwide analogues are amply illustrated to accompany the regionalto deposit-scale vectors to mineralization in order to best frame exploration approaches for IOCG deposits and facilitate their application in the under-explored terranes largely mapped prior to the recognition of the deposit type in the 1990s.