Cotabambas project

Porphyry copper (Cu-Au) deposit in Apurímac, Peru

Names and other identifiers

GMRAP ID 614
Alternate names Ccala
Tract name Peru Eocene–Oligocene Antapaccay (005pCu1009)
Included sites Azulccacca, Ccalla, Huaclle
Site status deposit

Geographic location

Country Peru
State or province Apurímac
Geographic location -72.348055556, -14.181111111
Geologic map unit -72.348055556, -14.181111111
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 35.7Ma
Age determination method K-Ar biotite
Age range 35.7 ±0.9 Ma
Age reference Perelló, Carlotto and others (2003)
Minerals alunite, anhydrite/gypsum, apatite, biotite, bornite, chalcocite, chalcopyrite, chlorite, Cu oxide, epidote, galena, gold, hematite, illite/smectite, limonite, magnetite, molybdenite, pyrite, rutile, sericite, sphalerite, sphene
Associated rocks andesite dike, breccia, dacite dike, diorite, granodiorite, quartz monzodiorite porphyry, diorite, granodiorite, skarn
Tectonic setting continental margin
Stratigraphic age Eocene

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Tonnage (Mt) 404Mt
Cu grade (%) 0.42%
Au grade (g/t) 0.23g/t
Ag grade (g/t) 2.84g/t
Contained copper 1,700,000t
Gold-Moly ratio -9999

Reference information

Comments Andahuaylas-Yauri belt. Exposed. Resources are updated from Wright and Colquhoun (2012). Singer and others (2008) reported resource as of July, 2007, at 0.3% Cu cut-off grade, continuing <100 ppm Mo. Alunite K-Ar age of 3.3±0.2 Ma.
Study area name Andes
References Panoro Minerals Ltd. (2007); Perelló, Neyra and others (2004); Perelló, Carlotto and others (2003); Singer and others (2008); Wright and Colquhoun (2012)
Site reference Cunningham and others (2008)
Panoro Minerals Ltd., 2007, A junior explorer with a major acquisition: Panoro Minerals Ltd., 24 p. (Also available at http://www.panoro.com/i/pdf/2007-07-18_RC.pdf.)Perelló, José; Carlotto, Victor; Zárate, Alberto; Ramos, Pedro; Rosso, Héctor; Neyra, Carlos; Caballero, Alberto; Fuster, Nicolás; and Muhr, Ricardo, 2003, Porphyry-style alteration and mineralization of the middle Eocene to early Oligocene Andahuaylas-Yauri belt, Cuzco region, Peru: Economic Geology, v. 98, p. 1575–1605. (Also available at http://dx.doi.org/10.2113/gsecongeo.98.8.1575.)
Perelló, J., Neyra, C., Rosso, H., Zárate, A., Ramos, P. Caballero, A., Martini, R., Fuster, N., and Muhr, R., 2004, Cotabambas—Late Eocene porphyry copper-gold mineralization southwest of Cuzco, Peru, in Sillitoe, R.H., Perelló, J., Vidal, C., eds., Andean metallogeny—New discoveries, concepts and updates: Society of Economic Geologists Special Publication 11, p. 213–230.
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/.Wright, Christopher, and Colquhoun, William, 2012, Cotabambas copper-gold project, Apurímac, Peru: Lima, AMEC (Perú) S.A. National Instrument 43-1-1 Technical Report prepared for Panoro Minerals Ltd., [127 p.]. (Also available at http://www.panoro.com/i/pdf/Cotabambas-Copper-Gold-Project-National-Instrument-43-101-Technical-Report.pdf.)