Deposit number | Country | Location | Names | Commodities |
298 | Chile (Atacama) | 26.33.18 S -- 070.19.00 W | Manto Verde; Mantoverde | Cu; Au; Ag; Fe |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | |||||||||
Compilers: | Sunil S. Gandhi | |||||||||
Release date: | 2015-03-04 | |||||||||
Deposit name(s): | Manto Verde; Mantoverde | |||||||||
Political location(s): | Chile; Province or state: Atacama; Nearest community: Copiapo (100 km 350) | |||||||||
Deposit clan (type): | Olympic Dam-type | |||||||||
Deposit (sub) types: | specularite-rich breccia ; Located on Manto Verde Fault, which dips moderately to the east and is part of the regional north-trending Atacama Fault Zone; older Manto Verde breccia and younger Manto Atacama breccia; Reference: Vila, T.; Lindsay, N.; Zamora, R., 1996: Geology of the Manto Verde Copper Deposit; in Andean Copper Deposits: New Discoveries, Mineralization Styles and Metallogeny, Edited by Camus, F.; Sillitoe, R.; Peterson , R. , Special Publication, Society of Economic Geologists, 5, 198 p, p. 157 - 169 | |||||||||
Deposit status: | producer; Size category: 120 Mt; Status comments: Production records date back to 19th century; 400 000 t mined during 1909-1939 (grade >3 % Cu); exploration by Empresa Minera de Mantos Blancos S. A. from 1988-95 outlined 85 Mt averaging 0.82 % Cu. | |||||||||
Geologic province: | Chilean Coastal Cordillera | |||||||||
Geologic subprovince: | Cretaceous Iron Belt | |||||||||
Geologic district: | Los Pozos | |||||||||
Deposit object located: | open pit | |||||||||
Commodities: | Cu; Au; Ag; Fe | |||||||||
Mineralization styles: | breccia-fillings | |||||||||
Geological ages: | Early Cretaceous (host rocks) Middle Cretaceous (alteration) | |||||||||
Tectonic setting: | continental orogenic belt-major fault zone; convergent; Formal name: Atacama Fault Zone (mineralization) | |||||||||
Coincident features: | fault trending NNW with breccia zones (Subsidiary fault of the regional Atacama Fault Zone; premineralization strike-slip and postmineralization dip-slip (E-side down) movements); Coincident feature name: Manto Verde Fault | |||||||||
Regional tectonic structure: | fault Tectonic structure name: Atacama Fault | |||||||||
Host rocks: | (1) volcanic; intermediate volcanic rocks (subaerial); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: continental arc; Metamorphic grade: greenschist
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Related igneous rocks: | (1) intrusive; gabbro-diorite suite (subvolcanic diorite porphyry stocks); Magma series: calc-alkaline; Depositional setting: continental (2) intrusive; granite suite (granite stocks); Magma series: calc-alkaline; Depositional setting: continental | |||||||||
Metallogenic signatures: | Cu Au Ag Fe | |||||||||
Alteration signatures: | sericitization: sericite, clay; What was altered: andesite, diorite potassic alteration: potash feldspar; What was altered: andesite,diorite chloritization: chlorite; What was altered: andesite, diorite tourmalinization: tourmaline; What was altered: host rock silicification: quartz; What was altered: host rocks | |||||||||
Mineralogy: | (alteration): hematite, malachite, chrysocola, brochantite, atacamite, cuprite, native copper (gangue): specularite, calcite (mineralization): chalcopyrite, pyrite, bornite | |||||||||
Radiometric ages: | Object dated: Host Rocks; Age - Ma: 117; +3; -3; Dating method: K-Ar; Concentrate: sericite; Source rock: Intermediate to felsic volcanics; Event dated: host rock; Interpretive comment: sericite alteration related to copper mineralization, hence age of host rocks is minimmum; Reference: Vila, T.; Lindsay, N.; Zamora, R., 1996: Geology of the Manto Verde Copper Deposit; in Andean Copper Deposits: New Discoveries, Mineralization Styles and Metallogeny, Edited by Camus, F.; Sillitoe, R.; Peterson , R. , Special Publication, Society of Economic Geologists, 5, 198 p, p. 157 - 169 Object dated: Related igneous rocks(2); Age - Ma: 121; +3; -3; Dating method: K-Ar; Concentrate: sericite; Source rock: granophyric dyke; Event dated: post-mineralization (intrusion); Interpretive comment: Ages for alteration-mineralization slightly older than adjacent plutons (130-127 Ma); Reference: Vila, T.; Lindsay, N.; Zamora, R., 1996: Geology of the Manto Verde Copper Deposit; in Andean Copper Deposits: New Discoveries, Mineralization Styles and Metallogeny, Edited by Camus, F.; Sillitoe, R.; Peterson , R. , Special Publication, Society of Economic Geologists, 5, 198 p, p. 157 - 169 | |||||||||
References: |
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Resource data: |
Estimate date: 2001; Component: Oxide; 230 million metric tons ore; Combined with production?: yes; Provisional entry?: no; Resource category: total resource
Percent weights allocated to deposit: 100.0% Estimate date: 2001; Component: sulphide; 400 million metric tons ore; Combined with production?: yes; Provisional entry?: no; Resource category: total resource
Percent weights allocated to deposit: 100.0% |