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Sierra Gorda

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Porphyry copper (Cu-Mo) deposit in Antofagasta, Chile

Names and other identifiers

GMRAP ID 290
Alternate names Isabela, Salvadora, Santa Catalina, Catalina
Tract name Chile-Peru Paleocene–Eocene Toquepala (005pCu1008)
Site status deposit

Geographic location

Country Chile
State or province Antofagasta
Geographic location -69.338888889, -22.880555556
Geologic map unit -69.338888889, -22.880555556
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Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Mo
Age (Ma) 64Ma
Age determination method unknown
Age range 64–63 Ma
Age reference Singer and others (2008)
Minerals antlerite, atacamite, brochantite, chalcanthite, chalcopyrite, clay minerals, jarosite, magnetite, malachite, pyrite, sericite, tourmaline
Associated rocks granodiorite, granodiorite porphyry, andesite
Tectonic setting continental margin
Stratigraphic age Paleocene

Commodity and development information

Development status Prospect
Major commodities Cu, Mo, Au
Tonnage (Mt) 2,918Mt
Cu grade (%) 0.353%
Mo grade (%) 0.016%
Au grade (g/t) 0.048g/t
Contained copper 10,300,000t
Gold-Moly ratio 3

Reference information

Study area name Andes
References Boric and others (1990); Perelló (2005); Sillitoe and McKee (1996); Zappettini and others (2001); Singer and others (2008); Quadra FNX Mining Ltd.; Lopez and Ristorcelli (2011)
Site reference Cunningham and others (2008)
Boric, R.P., Diaz, F.F., and Maksaev, V.J., 1990, Geología y yacimientos metalíferos de la Región de Antofagasta: Santiago, [Chile] Servicio Nacional de Geología y Mineneria, Boletin 40, 246 p., 1 map, scale 1:500,000.
Lopez, Leonel, and Ristorcelli, Steven, 2011, Technical Report for the Sierra Gorda Project,Chile: National Instrument 43-101 Technical Report prepared by Pincock, Allen, and Holt and Mine Development Associates for Quadra FNX Mining Ltd., 240 p.
Perelló, J.A., 2005, Exploration review—South America: Society of Economic Geologists SEG Newsletter, no. 61, p. 42–44. (Also available at http://www.segweb.org/pdf/publications/newsletters/2005/SEG-Newsletter-61-2005-April.pdf.)Quadra FNX Mining Ltd., 2011, Quadra FNX files NI 43-101 technical reports for the Sierra Gorda and Victoria projects: Quadra FNX Mining Ltd. press release, June 9, 2011, 1 p., accessed June 16, 2014, at http://kghm.com/media-centre/news-releases/news-releases-details/2011/Quadra-FNX-Files-NI-43-101-Technical-Reports-for-the-Sierra-Gorda-and-Victoria-Projects/default.aspx.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/.
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.