Chimborazo

Porphyry copper deposit in Antofagasta, Chile

Names and other identifiers

GMRAP ID 296
Tract name Chile Eocene–Oligocene Chuquicamata (005pCu1010)
Site status deposit

Geographic location

Country Chile
State or province Antofagasta
Geographic location -69.083333333, -24.133333333
Geologic map unit -69.083333333, -24.133333333
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 37Ma
Age determination method unknown
Age range 38.72 ±0.17 to 34.9 ±0.41 Ma
Age reference Singer and others (2008)
Minerals alunite, anhydrite, biotite, bornite, brochantite, atacamite, chalcocite, chalcopyrite, chlorite, clay minerals, covellite, enargite, pyrite, sericite, tennantite
Associated rocks breccia, diorite porphyry, monzonite porphyry, tonalite porphyry, andesite, dacite, diorite, granodiorite, tuff
Tectonic setting continental margin
Stratigraphic age Eocene

Commodity and development information

Development status Prospect
Major commodities Cu
Tonnage (Mt) 236Mt
Cu grade (%) 0.6%
Contained copper 1,400,000t
Gold-Moly ratio -9999

Reference information

Comments 30% of the deposit area is covered by gravel.
Study area name Andes
References Kelley and others (2003); Long (1995); Petersen and others (1994); Petersen and others (1996); Richards (1999); Richards and others (2001); Sillitoe and Perelló (2005); Singer and others (2008)
Site reference Cunningham and others (2008)
Kelley, D.L.,Hall, G.E.M., Closs, L.G., Hamilton, I.C., and McEwen, R.M., 2003, The use of partial extraction geochemistry for copper exploration in northern Chile: Geochemistry, Exploration, Environment, Analysis, v. 3, p. 85–104.
Long, K.R., 1995, Production and reserves of Cordilleran (Alaska to Chile) porphyry copper deposits, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p. 35–68.
Petersen, C.R., Rivera, S.L., and Peri, M.A., 1994, Chimborazo copper deposit, II Region, Chile exploration and geology: Congreso Geologico Chileno, 7th, Concepcion, Actas, v. 2, p. 1613.
Petersen, C.R., Rivera, S.L., and Peri, M.A., 1996, Chimborazo copper deposit, Region II, Chile—Exploration and geology, in Camus, F., Sillitoe, R.H., and Petersen, R., eds., Andean copper deposits: new discoveries, mineralization, style and metallogeny: Society of Economic Geologists Special Publication 5, p. 71–80.
Richards, J.P., 1999, Tectonomagmatic controls on localization of porphyry copper deposits, Chile, in Stanley, C.J., and others, eds., Mineral deposits—Processes to processing: Rotterdam, Balkema, Society for Geology Applied to Mineral Deposits (SGA) Biennial Meeting, 5th, London, U.K., 1999 [Proceedings], v. 1, p. 425–428.
Richards, J.R., Boyce, A.J., and Pringle, M.S., 2001, Geologic evolution of the Escondida area, northern Chile—A model for spatial and temporal localization of porphyry Cu mineralization: Economic Geology, v. 96, p. 271–305. (Also available at http://dx.doi.org/10.2113/gsecongeo.96.2.271.)
Sillitoe, R.H., and Perelló, Jose, 2005, Andean copper province—Tectonomagmatic settings, deposit types, metallogeny, exploration, and discovery, in Hedenquist, J.W., Thompson, J.F.H., Goldfarb, R.J., and Richards, J.P., eds., Economic Geology One Hundredth Anniversary Volume, 1905–2005: Littleton, Colo., Society of Economic Geologists, p. 845–890.
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.