Porphyry copper deposit in Sonora, Mexico

Names and other identifiers

Alternate names La Mariquita
Tract name Western Sierra Madre Occidental and Laramide Central (003pCu3007x)
Site status deposit

Geographic location

Country Mexico
State or province Sonora
Geographic location -110.42621607, 31.044522181
Geologic map unit -110.42621607, 31.044522181
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 63Ma
Age determination method unknown
Age range ~63 Ma
Age reference Singer and others (2008)
Minerals alunite, biotite, chalcocite, chalcopyrite, chlorite, goethite, hematite/specularite, jarosite, kaolinite, malachite, magnetite, pyrite, sericite, tourmaline, turquoise
Associated rocks diorite, marble, monzogabbro, monzonite, schist
Tectonic setting continental margin
Stratigraphic age Paleocene

Commodity and development information

Development status Past Producer
Tonnage (Mt) 100Mt
Cu grade (%) 0.45%
Contained copper 450,000t
Gold-Moly ratio -9999

Reference information

Comments 30 Mt at 0.7% Cu. In development (2008). Located at contact between Cretaceous intrusive and Jurassic volcanics. Alteration: sericitization-argillization.
Study area name Mexico
References Castro-Escárrega and others (2000); Singer and others (2008); Leonard (1989); Sillitoe (1976)
Site reference Hammarstrom and others (2010)
Castro-Escárrega, J.J.; López-Escalona, Juan; Díaz-Salgado, Ciro; and Espinoza-Beltrán, Carlos, comps., 2007, Carta geólogico-minera, Estado de Sinaloa: Servicio Geológico Mexicano, 1 sheet, scale 1:500,000.
Leonard, K.R., 1989, Preliminary deposit-type map of northwestern Mexico: U.S. Geological Survey Open-File Report 89-158, 350 p. (Also available at
Sillitoe, R.H., 1976, A reconnaissance of the Mexican porphyry copper belt: Institutions of Mining and Metallurgy Transactions, Section B—Applied Earth Science, v. 85, p. B170–B189.
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