Potrerillos

Porphyry copper (Cu-Au) deposit in Atacama, Chile

Names and other identifiers

GMRAP ID 300
Alternate names Andes
Tract name Chile Eocene–Oligocene Chuquicamata (005pCu1010)
Included sites San Antonio
Site status deposit

Geographic location

Country Chile
State or province Atacama
Geographic location -69.423888889, -26.4875
Geologic map unit -69.423888889, -26.4875
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 36Ma
Age determination method unknown
Age range 39–34 Ma
Age reference Singer and others (2008)
Minerals adularia, alunite, anhydrite/gypsum, ankerite, antimony, arsenopyrite, azurite/malachite, biotite, bismuth, bornite, brochantite, carbonate, chalcocite, chalcopyrite, chrysocolla, covellite, cuprite, diaspore, galena, gold, jarosite, kaolinite/illite/dickite, magnetite, montmorillonite, pyrite, pyrophyllite, rutile, sericite, silver, sphalerite, stibnite, tetrahedrite/tennantite, woodhouseite, zunyite
Associated rocks breccia, andesite porphyry, dacite porphyry, feldspar porphyry, skarn, granite, granodiorite, limestone, siltstone
Tectonic setting continental margin
Stratigraphic age Eocene

Commodity and development information

Development status Producer
Major commodities Cu, Mo, Au
Tonnage (Mt) 1,030Mt
Cu grade (%) 0.976%
Mo grade (%) 0.011%
Au grade (g/t) 0.77g/t
Contained copper 10,100,000t
Gold-Moly ratio 70

Reference information

Comments Exposed.
Study area name Andes
References Colley and others (1989); Long (1995); Marsh and others (1997); Mpodozis and others (1994); Sillitoe (1981); Sillitoe (1991); Thompson and others (2004); Tomlinson (1994); Zappettini and others (2001); Singer and others (2008)
Site reference Cunningham and others (2008)
Colley, H., Treloar, P.J., and Diaz, F., 1989, Gold-silver mineralization in the El Salvador region, northern Chile, in Keays, R.R., Ramsay, W.R.H., and Groves, D.I., eds., The geology of gold deposits—The perspective in 1988: Economic Geology Monograph 6, p. 208–217.
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.
Marsh, T.M., Einaudi, M.T., and McWilliams, Michael, 1997, 40Ar/39Ar geochronology of Cu-Au and Au-Ag mineralization in the Potrerillos district, Chile: Economic Geology, v. 92, p. 784–806. (Also available at http://dx.doi.org/10.2113/gsecongeo.92.7-8.784.)
Mpodozis, C., Tomlinson, A.J., and Cornejo, P.C., 1994, Acerca del control estructural de intrusivos Eocenosy porfidos cupriferos en la region de Potrerillos–El Salvador: Congreso Geologico Chileno, 7th, Actas v. 2, p. 1596–1600.
Sillitoe, R.H., 1981, Regional aspects of the Andean porphyry copper belt in Chile and Argentina: Applied Earth Science, Institution of Mining and Metallurgy Transactions, Section B, v. 90, p. B15–B36.
Sillitoe, R.H., 1991, Gold metallogeny of Chile—An introduction: Economic Geology, v. 86, p. 1187–1205. (Also available at http://dx.doi.org/10.2113/gsecongeo.86.6.1187.)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/.
Thompson, J.F.H., Gale, V.G., Tosdal, R.M., and Wright, W.A., 2004, Characteristics and formation of the Jerónimo carbonate-replacement gold deposit, Potrerillos district, Chile, in Sillitoe, R.H., Perelló, J., and Vidal, C.E., eds., Andean metallogeny—New discoveries, concepts, and updates: Society of Economic Geologists Special Publication 11, p. 75–95.
Tomlinson, A.J, 1994, Relaciones entre el porfido cupriferoy La Falla inversa de la mina de Potrerillos: un caso de intrusion syntectonica Potrerillos–El Salvador: Congreso Geologico Chileno, 7th, Actas, v. 2, p. 1629–1633.
Zappettini, Eduardo; Miranda-Angles, Vitaliano; Rodriguez S., Carolina; Palacios, Oscar; Cocking,Robert; Godeas, Marta; Uribe-Zeballos, Hernán; Vivallo S., Waldo; Paz, M.M.; Seggiaro, Raúl; Heuschmidt, Bertand; Gardeweg P., Moyra; Boulangger Rondoy, Elmere; Korzeniewski, Lidia I.; Mpodozis M., Constantino; Carpio R., Mario; and Rubiolo, Daniel, 2001, Mapa metalogénico de laregión fronteriza entre Argentina, Bolivia, Chile y Perú (14ºS–28ºS): Santiago, Chile, Servicio Nacional de Geología y Minería, Publicacion Geológica Multinacional No. 2, 222 p., 1 map, scale 1:1,000,000.