Chilito

Porphyry copper deposit in Arizona, United States

Names and other identifiers

GMRAP ID 71
Tract name Western Sierra Madre Occidental and Laramide Central (003pCu3007x)
Site status deposit

Geographic location

Country United States
State or province Arizona
Geographic location -110.796111111, 33.065277778
Geologic map unit -110.796111111, 33.065277778
Nearby data

Geologic information

Deposit type Porphyry copper
Minerals actinolite, anhydrite, biotite, chalcocite, chalcopyrite, chlorite, diopside, epidote, garnet, goethite/limonite, magnetite, molybdenite, pyrite, sericite
Associated rocks rhyodacite porphyry, conglomerate, granite, diabase, limestone, quartz latite porphyry, quartzite, shale
Tectonic setting continental margin

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 199Mt
Cu grade (%) 0.3%
Ag grade (g/t) 1.5g/t
Contained copper 600,000t
Gold-Moly ratio -9999

Reference information

Comments Exposed.
Study area name United States
References Eastlick (1968); Koski and Cook (1982); Long (1995); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Eastlick, J.T., 1968, Geology of the Christmas mine and vicinity, Banner mining district, Arizona, in Ridge, J.D., ed., Ore deposits of the United States, 1933–1967: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., p. 1191–1210.
Koski,R.A., and Cook, D.S., 1982, Geology of the Christmas porphyry copper deposit, in Titley,S.R., ed., Advances in geology of the porphyry copper deposits, southwesternNorth America: Tucson, University of Arizona Press, p. 353–374.
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 http://pubs.usgs.gov/of/2008/1155/.