Database name: |
World Fe-oxide+/-Cu-Au-U (IOCG) deposits |
Compilers: |
Sunil S. Gandhi |
Release date: |
2015-03-04 |
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Deposit name(s): |
Cobriza |
Political location(s): |
Peru; Province or state: Huancavelica; Nearest community: Lima (300 km ESE) |
Deposit clan (type): |
Kiruna-type |
Deposit status: |
producer; Size category: 100 Mt; Status comments: current production 10 000 tpd Cu ore; 100 Mt resources average 1.4 to 1.6 % Cu and 14 to 19 g/t Ag (Espinoza, 2002); deposit 5500 m long 15-25 m thick, > 2000 m deep; strike 315, dip 30 to 50 deg. SE |
Geologic province: |
Hercynian Orogen |
Geologic subprovince: |
Eastern Cordillera |
Geologic district: |
Permo-Triassic Ensialic Rift |
Commodities: |
Cu; Ag; Bi; Fe |
Geological ages: |
Permian - Triassic (related magmatics) |
Host rocks: |
(1) sedimentary; carbonate; Depositional setting: ensialic rift; Metamorphic grade: greenschistHost rock stratigraphy: | Cobriza Limestone |
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Related igneous rocks: |
(1) intrusive; granite suite; Initials: Cobriza granite; Magma series: alkaline (A-type); Depositional setting: continental |
Radiometric ages: |
Object dated: Alteration Signature; Age - Ma: 263.4; +8; -8; Dating method: K-Ar; Concentrate: amphibole; Source rock: granite-altered; Event dated: mineralization; Interpretive comment: age close to age of 253+/-11 Ma old Azul batholith to which Cobriza granite NE of deposit belongs; Reference: Injoque, J., 2002: Fe Oxide-Cu-Au Deposits in Peru: An Integrated View; Section The Americas, in Hydrothermal Iron Oxide Copper-Gold and Related Deposits: A Global Perspective, Volume 2, Edited by Porter, T. M., Australian Mineral Foundation, Adelaide, Australia, PGC Publishing, Adelaide, 377 p, p. 97 - 114 |
Deposit shape: |
tabularDeposit dimensions: | length: 5,500 metres width: 20 metres thickness: 2,000 metres |
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Qualified comments: |
(Applies to: reserve/resource assays) Current production 10 000 tpd Cu ore; 100 Mt resources average 1.4 to 1.6 % Cu and 14 to 19 g/t Ag (Espinoza, 2002); deposit 5500 m long 15-25 m thick, > 2000 m deep; strike 315, dip 30 to 50 deg. SE |
References: |
Injoque, J., 2002 |
Fe Oxide-Cu-Au Deposits in Peru: An Integrated View |
Section The Americas, in Hydrothermal Iron Oxide Copper-Gold and Related Deposits: A Global Perspective, Volume 2, Edited by Porter, T. M., Australian Mineral Foundation, Adelaide, Australia, PGC Publishing, Adelaide, 377 p, p. 97 - 114 |
Petersen, U., 1965 |
Regional Geology and Major Ore Deposits of Central Peru |
Economic Geology, Volume 60, p. 407 - 476 |
Sillitoe, 2003 |
Iron Oxide-Copper-Gold Deposits: An Andean View |
Mineralium Deposita, Volume 38, p. 787 - 812 |
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