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Magistral

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Porphyry copper (Cu-Mo) deposit in Ancash, Peru

Names and other identifiers

GMRAP ID 249
Tract name Peru-Ecuador middle–late Miocene La Granja (005pCu1006)
Site status deposit

Geographic location

Country Peru
State or province Ancash
Geographic location -77.771666667, -8.215555556
Geologic map unit -77.771666667, -8.215555556
Nearby data
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Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Mo
Age (Ma) 15Ma
Age determination method unknown
Age range 15.3 ±0.7 Ma
Age reference Singer and others (2008)
Minerals bornite, chalcocite, chalcopyrite, chlorite, covellite, epidote, galena, kaolinite, molybdenite, pyrite, sericite, sphalerite, tetrahedrite
Associated rocks quartz monzonite porphyry, skarn,granodiorite,andesite, limestone
Tectonic setting continental margin
Stratigraphic age Miocene

Commodity and development information

Development status Prospect
Major commodities Cu, Mo, Ag
Tonnage (Mt) 270Mt
Cu grade (%) 0.51%
Mo grade (%) 0.062%
Ag grade (g/t) 4.11g/t
Contained copper 1,400,000t
Gold-Moly ratio -9999

Reference information

Comments Exposed.
Study area name Andes
References Anonymous (2001d); Cabello (2002); Chadwick (2001); Heintze (1985); Inca Pacifica Resources Inc. (2007); Noble and others (2004); Perelló, García and others (2001); Singer and others (2008)
Site reference Cunningham and others (2008)
Anonymous, 2001d, Magistral drilling pulls high-grade copper: The Northern Miner, August 27–September 2, p. 11.
Cabello, J., 2002, Copper exploration in the central Andes—A review: Chile, BHP Billiton, 7 p., accessed 2008, at http://www.metabulletin.com/speakerpaper/copper/presentations/bhpbilliton.pdf. [Web page no longer available.]
Chadwick, J., 2001, Andean action: Mining Magazine, v. 184, no. 5, p. 234–247.
Heintze, L., 1985, Geologie und Geochemie der Porphyryshen Stockwerk-Molybdän-Lagerstätte Tamboras, Zone la Negra (Peru): Geologisches Jahrbuch, Reihe D, no. 72, 94 p.
Inca Pacifica Resources Inc., 2007, Magistral copper-molibdenum porphyry/skarn deposit: Inca Pacifica Resources Inc. Preliminary Feasibility Study Summary, 4 p., accessed 2008, at http://www.incapacific.com/s/Magistral.asp. [Web page no longer available.]
Noble, D.C., Vidal, C.E., Perelló, J., and Rodríguez, O.P., 2004, Space-time relationships of some porphyry Cu-Au, epithermal Au, and other magmatic-related mineral deposits in northern 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. 313–318.
Perelló, J., García, A., Ramos, P., Glover, K., Neyra, C., Muhr, R., Fuster, N., and Caballero, A., 2001, The Magistral porphyry-skarn Cu-Mo deposit, Ancash, Peru: II Congress of Prospectors and Explorers, ProExplo 2001, Lima, Peru, 3 p., accessed 2008, at http://www.proexplo.com.pe/encont/opcion/e2001.htm. [Web page no longer available.]
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/.