Porphyry copper (Cu-Au) deposit in Sinaloa, Mexico

Names and other identifiers

Alternate names La Reyna
Tract name Western Sierra Madre Occidental and Laramide Central (003pCu3007x)
Group name Malpica
Included sites La Reyna, Cerro Pelon, Cerro Tunnel
Site status deposit

Geographic location

Country Mexico
State or province Sinaloa
Geographic location -106.100145016, 23.269054099
Geologic map unit -106.100145016, 23.269054099
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 54.1Ma
Age determination method Re-Os molybdenite
Age range 54.1 ±0.3 Ma
Age reference Barra and others (2005)
Tectonic setting continental margin
Stratigraphic age Eocene

Commodity and development information

Development status Past Producer
Major commodities Cu, Au
Tonnage (Mt) 33Mt
Cu grade (%) 0.5%
Au grade (g/t) 0.4g/t
Contained copper 160,000t
Gold-Moly ratio -9999

Reference information

Comments Skeena Resources Ltd. (von Fersen, 2007) exploration on 7,718.8 ha area on 14 concessions: drilling on open main Cerro Tunel (230 m by 100 m) and Cerro Pelon (300 m by 100 m) tourmaline-cemented breccia pipes. IP surveys define mineralized zones. Described as a subtype of porphyry copper model. Regional Cu-Au anomalies in soil and lithogeochemistry surveys. Non-compliant ""proven-probable"" resource for Malpica breccias of 29 Mt, 0.51% Cu, 0.40 g/t Au (Cambior Mines Annual Report, 1996). No assay data available on silver. Location given for northern part of 2008 exploration project area. Area includes La Reyna deposits (Singer and others, 2008). Alteration: sericitic.
Study area name Mexico
References Singer and others (2005); Skeena Resources Ltd. (2008); Torres-Escamilla and others (1999); Zürcher (2002); von Fersen (2007); Servicio Geológico Mexicano (2007); Singer and others (2008); Barra and others (2005)
Site reference Hammarstrom and others (2010)
Barra, Fernando; Ruiz, Joaquin; Valencia, V.A.; Ochoa-Landín, Lucas; Chesley, J.T., and Zürcher, Lukas, 2005, Laramide porphyry Cu-Mo mineralization in northern Mexico—Age constraints from Re-Os geochronology in molybdenite: Economic Geology, v. 100, p. 1605–1616. (Also available at
Servicio Geológico Mexicano, 2007, Base de datos de mineral de cobre de la cartografìa geològico minera: Subdirección de Geociencia Digital y Documentación Tècnica, 1:250,000.
Singer, D.A., Berger, V.I., and Moring, B.C., 2005, Porphyry copper deposits of the world—Database, map, and grade and tonnage models: U.S. Geological Survey Open-file Report 2005-1060, [9] p. and digital data, accessed December 31, 2013, at, 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 Resources Ltd., 2008, Skeena Resources Ltd. home page: accessed June 8, 2008, at
Torres-Escamilla, Tonatiuh, Bataz-Manríquez, Gabriel, Moreno-López, and M.H. Fernando, 1999, Carta geológico-minera, Mazatlán F13-1, Sinaloa [Mexico]: Pachuca, Hidalgo, Servicio Geológico Mexicano, 1 sheet, scale 1:250,000.
von Fersen, N.O., 2007, Technical report on the Malpica project, Municipality of Concordia, Sinaloa State, Mexico: National Instrument 43-101 Technical Report prepared for Skeena Resources Ltd., Vancouver, Brit. Columbia, 51 p. (Also available atürcher, Lukas, 2002, Regional setting and magmatic evolution of Laramide porphyry copper systems in western Mexico: Tucson, University of Arizona, Ph. D. thesis, 427 p. (Also available at