Copper Basin

Porphyry copper deposit in Arizona, United States

Names and other identifiers

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

Geographic location

Country United States
State or province Arizona
Geographic location -112.58788475, 34.490644226
Geologic map unit -112.58788475, 34.490644226
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 64Ma
Age determination method unknown
Age range 64 Ma
Age reference Singer and others (2008)
Minerals azurite/malachite, biotite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, copper, cuprite, ferrimolybdite, hematite, jarosite, limonite, magnetite, molybdenite, pyrite, sericite, serpentine
Associated rocks breccia, diorite, quartz latite porphyry, quartz monzonite, quartz monzonite porphyry, amphibolite, granodiorite, granodiorite porphyry, metasedimentary rocks, quartz diorite, rhyolite, rhyolite tuff
Tectonic setting continental margin
Stratigraphic age Paleocene

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 228Mt
Cu grade (%) 0.4%
Mo grade (%) 0.0145%
Contained copper 900,000t
Gold-Moly ratio -9999

Reference information

Comments Exposed.
Study area name United States
References Damon and others (1997); Johnston and Lowell (1961); Long (1995); Titley (1993); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Damon, P.E., Shafiqullah, M., Harris, R.C., and Spencer, J.E., 1997, Compilation of unpublished Arizona K-Ar dates from the University of Arizona Laboratory of Isotope Geochemistry: Arizona Geological Survey Open-File Report 96-18, 53 p.
Johnston, W.P., and Lowell, J.D., 1961, Geology and origin of mineralized breccia pipes in Copper Basin, Arizona: Economic Geology, v. 56, p. 916–940. (Also available at
Long, K.R., 1995, Production and reserves of Cordilleran (Alaska to Chile) porphyry copper deposits, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p. 35–68.
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
Titley, S.R., 1993, Characteristics of porphyry copper occurrence in the American Southwest, in Kirkham, R.V., Sinclair, W.D., Thorpe, R.I., and Duke, J.M., eds., Mineral deposit modeling: Geological Association of Canada Special Paper 40, p. 433–464.