Toromocho

Porphyry copper deposit in Junín, Peru

Names and other identifiers

GMRAP ID 254
Alternate names Toro Mocho, Morococha
Tract name Peru-Ecuador middle–late Miocene La Granja (005pCu1006)
Site status deposit

Geographic location

Country Peru
State or province Junín
Geographic location -76.133333333, -11.6
Geologic map unit -76.133333333, -11.6
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 8Ma
Age determination method K-Ar
Age range 8–7 Ma
Age reference Singer and others (2008)
Minerals actinolite, biotite, bismuthinite, calcite, chalcocite, chalcopyrite, chlorite, covellite, cubanite, diopside, enargite, galena, garnet, magnetite, pyrite, serpentine, sphalerite, talc, tennantite/tetrahedrite, tremolite
Associated rocks breccia, dacite porphyry, quartz monzonite porphyry, quartz porphyry, hornfels, skarn,basalt, phyllite, shale, sandstone ,andesite, dacite, diorite, granodiorite, dolomitic conglomerate, limestone, marble
Tectonic setting continental margin
Stratigraphic age Miocene

Commodity and development information

Development status Prospect
Major commodities Cu, Mo, Ag, Au
Minor commodities Pb, Zn
Trace commodities Bi, W, As, Sb
Tonnage (Mt) 2,152Mt
Cu grade (%) 0.461%
Mo grade (%) 0.017%
Ag grade (g/t) 7g/t
Contained copper 9,920,000t
Gold-Moly ratio -9999

Reference information

Comments Exposed. 2006 pre-feasibility study. Some additional reported contents: 0.246 oz/t Ag, 0.00007 oz/t Au, 0.031% Pb, 0.145% Zn, 0.0129 % Mo, 0.0047% Bi, 0.0238% W, 0.0447% As, 0.0082% Sb.
Study area name Andes
References Angulo (2000); Peru Copper Inc. (2006); Peru Copper Inc. (2007); Sillitoe (1988); Stakiw (2007b); Singer and others (2008)
Site reference Cunningham and others (2008)
Angulo, A.A., 2000, Yacimiento Toromocho—Primer volumen de monografias de yacimientos minerales Peruanos—Historia, exploration y geología: Lima, Instituto de Ingenieros de Minas del Peru, p. 205–225.
Peru Copper Inc., 2006, Developing a world-class deposit at the Toromocho project in Peru, 2 p., accessed 2008, at http://www.perucopper.com/i/pdf/Fact-Sheet.pdf. [Web page no longer available.]
Peru Copper Inc., 2007, Toromocho project, 3 p., accessed 2008, at http://www.perucopper.com/s/Toromocho.asp. [Web page no longer available.]
Sillitoe, R.H., 1988, Epochs of intrusion-related copper mineralization in the Andes: Journal of South American Earth Sciences, v. 1, no. 1, p. 89–108. (Also available at http://dx.doi.org/10.1016/0895-9811(88)90018-1.)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/.
Stakiw, S., 2007b, Peru Copper endorses $840M Chinese bid takeover targets Toromocho deposit: The Northern Miner, June 18–24, 2007, p. 1–2.