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 -110.983055556, 33.163611111
Geologic map unit -110.983055556, 33.163611111
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 69Ma
Age determination method unknown
Age range 69 Ma
Age reference Singer and others (2008)
Minerals azurite/malachite, biotite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, copper, covellite, cuprite, Cu-Mn wad, dioptase, epidote, galena, goethite/limonite, halloysite, hematite/specularite, jarosite, kaolinite, libethenite, magnetite, molybdenite, montmorillonite, silver, pyrite, sericite, sphalerite
Associated rocks breccia, quartz monzonite porphyry, andesite, basalt, dacite, dacite welded tuff, diorite, limestone, quartz diorite porphyry, quartzite, rhyolite tuff, conglomerate, diabase, diorite porphyry, quartz diorite, quartz monzonite, schist, shale, tuff
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Producer
Major commodities Cu
Tonnage (Mt) 1,583Mt
Cu grade (%) 0.68%
Mo grade (%) 0.001%
Contained copper 11,000,000t
Gold-Moly ratio -9999

Reference information

Comments Exposed.
Study area name United States
References Banks and others (1972); Bouse and others (1999); Cornwall (1982); Gambell (1978); McKee and Koski (1981); Metz and Rose (1966); Niemuth (1994); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Banks, N.G., Cornwall, H.R., Silberman, M.L., Creasey, S.C., and Marvin, R.F., 1972, Chronology of intrusion and ore deposition at Ray, Arizona—Part I, K-Ar ages: Economic Geology, v. 67, p. 864–878. (Also available at http://dx.doi.org/10.2113/gsecongeo.67.7.864.)Bouse, R.M., Ruiz, Joaquin, Titley, S.R., Tosdal, R.M., and Wooden, J.L., 1999, Lead isotope compositions of Late Cretaceous and early Tertiary igneous rocks and sulfide minerals in Arizona—Implications for the sources of plutons and metals in porphyry copper deposits: Economic Geology, v. 94, p. 211–244. (Also available at http://dx.doi.org/10.2113/gsecongeo.94.2.211.)
Cornwall, H.R., 1982, Petrology and chemistry of igneous rocks, Ray porphyry copper district, Pinal County, Arizona, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 259–273.
Gambell, N.A., 1978, Geology and mineralization of the Ray silicate ore body, Pinal county, Arizona, in Jenney, J.P and Hauck, H.R., eds., Porphyry Copper Symposium, Tucson, Ariz., March 18–20, 1976, Proceedings: Arizona Geological Society Digest 11, p. 35. (Also available at http://www.arizonageologicalsoc.org/Default.aspx?pageId=1665440 and at http://archives.arizonageologicalsoc.org/digests/AGS_DIG11_S.PDF.)
McKee, E.H., and Koski, R.A., 1981, K–Ar ages for igneous rocks and vein minerals from the Christmas mine area, Arizona: Isochron/West, no. 32, December, p. 7–11.
Metz, R.A., and Rose, A.W., 1966, Geology of the Ray copper deposit, Ray Arizona, in Titley, S.R., and Hicks, C.L., eds., Geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 177–188.
Niemuth, N.J., 1994, The primary copper industry of Arizona, 1992: Arizona Department of Mines and Mineral Resources Special Report 20, 58 p. (Also available at http://mines.az.gov/DigitalLibrary/ADMMR_Reprints/CopperReports/cu1992SR20.pdf.)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/.