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Ujina

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Porphyry copper deposit in Antofagasta, Chile

Names and other identifiers

GMRAP ID 282
Tract name Chile Eocene–Oligocene Chuquicamata (005pCu1010)
Site status deposit

Geographic location

Country Chile
State or province Antofagasta
Geographic location -68.637222222, -20.992777778
Geologic map unit -68.637222222, -20.992777778
Nearby data
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Geologic information

Deposit type Porphyry copper
Age (Ma) 35.2Ma
Age determination method unknown
Age range 35.2 ±0.3 to 34.7 ±0.3 Ma
Age reference Singer and others (2008)
Minerals albite, alunite, biotite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, copper, covellite, cuprite, Cu-wad, enargite, hematite, kaolinite/dickite/illite, magnetite, malachite, molybdenite, montmorillonite, muscovite/sericite, pyrite, pyrophyllite, tennantite
Associated rocks dacite porphyry, granodiorite porphyry, andesite, andesite porphyry, ignimbrite, rhyolite, tuff
Tectonic setting continental margin
Stratigraphic age Eocene

Commodity and development information

Development status Producer
Major commodities Cu
Tonnage (Mt) 1,298Mt
Cu grade (%) 0.71%
Contained copper 9,200,000t
Gold-Moly ratio -9999

Reference information

Comments Cu enrichment age: 15 Ma. 100% of the deposit area is covered by gravel and ignimbrite as much as 100 m thick.
Study area name Andes
References Bisso and others (1998); Briggs (2006); De Beer and Dick (1994); Dick and others (1994); Masterman and others (2004); Masterman, Cooke and Moore (2005); Mine of the Month (2006); Moore and Masterman (2002); Sillitoe (1995b); Sillitoe and McKee (1996); Singer and others (2008)
Site reference Cunningham and others (2008)
Bisso, C.B., Duran, M., and Gonzales, A.A., 1998, Geology of the Ujina and Rosario copper porphyry deposits, Collanhuasi district, Chile, in Porter, T.M., ed., Porphyry and hydrothermal copper and gold deposits—A global perspective: Adelaide, PGC Publishing, Australian Mineral Foundation International Conference, Perth, Western Australia, November 30–December 1, 1998 [Proceedings], p. 217–232. (Abstract also available at http://www.portergeo.com.au/publishing/porphyry98/porphyry98start.html.)
Briggs, D.F., 2006, Mining operations report, ver. 2005: unpublished report, [unknown] p.
De Beer, L.J., and Dick, L.A., 1994, Development of the Collahuasi copper deposits—A world-class copper project in the Andes of northern Chile, in Mining Latin America: London, The Institution of Mining and Metallurgy, p. 181–195.
Dick, L.A., Chávez, W.X., Jr., Gonzales, A., and Bisso, C., 1994, Geologic setting and mineralogy of the Cu-Ag-(As) Rosario vein system, Collahuasi district, Chile: Society of Economic Geologists SEG Newsletter, no. 19, p. 1, 6–11. (Also available at http://www.segweb.org/pdf/publications/newsletters/1994/SEG-Newsletter-19-1994-October.pdf.)Masterman, G.J., Cooke, D.R., Berry, R.F., Clark, A.H., Archibald, D.A., Mathur, Ryan, Walshe, J.L., and Durán, Manuel, 2004, 40Ar/39Ar and Re-Os geochronology of porphyry copper-molybdenum deposits and related copper-silver veins in the Collahuasi district, northern Chile: Economic Geology, v. 99, p. 673–690. (Also available at http://dx.doi.org/10.2113/gsecongeo.99.4.673.)Masterman, G.J., Cooke, D.R., and Moore, 2005, Geology and discovery of porphyry Cu-Mo-Ag deposits in the Collahuasi district, northern Chile, in Porter, T.M., ed., Super porphyry copper and gold deposits—A global perspective: Adelaide, PGC Publishing, v. 1, p. 175–188. (Abstract also available at http://www.portergeo.com.au/publishing/superporphyry/superpstart.html.)
Mine of the Month, 2006, Collahuasi on high: Mining Magazine, January 2006.
Moore, R.L., and Masterman, G.J., 2002, The corporate discovery history and geology of the Collahuasi porphyry copper deposits, Chile, in Cooke, D.R., and Pongratz, J., eds., Giant ore deposits—Characteristics, genesis and exploration: CODES Special Publication 4, p. 23–50.
Sillitoe, R.H., 1995b, Collahuasi, Chile, in Exploration and discovery of base- and precious-metal deposits in the Circum-Pacific region during the last 25 years: Tokyo, Society of Resource Geology, Resource Geology Special Issue 19, p. 7–9.
Sillitoe, R.H., and McKee, E.H., 1996, Age of supergene oxidation and enrichment in the Chilean porphyry copper province: Economic Geology, v. 91, p. 164–179. (Also available at http://dx.doi.org/10.2113/gsecongeo.91.1.164.)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/.