MacArthur

Porphyry copper deposit in Nevada, United States

Names and other identifiers

GMRAP ID 43
Tract name Western U.S. and Sonoran Desert Jurassic Arc (003pCu9006x)
Site status deposit

Geographic location

Country United States
State or province Nevada
Geographic location -119.24, 39.05
Geologic map unit -119.24, 39.05
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 161Ma
Age determination method unknown
Age range 161 Ma
Age reference Singer and others (2008)
Minerals actinolite, azurite/malachite, biotite, chalcocite, chalcopyrite, chrysocolla, goethite/limonite, pyrite, tenorite
Associated rocks granite porphyry, quartz monzonite porphyry, argillite, gypsum, ignimbrite, rhyolite, sandstone, volcaniclastic rocks, andesite, granite, hornfels, quartz monzonite, skarn
Tectonic setting mixed
Stratigraphic age Middle Jurassic–Late Jurassic

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 88Mt
Cu grade (%) 0.21%
Contained copper 180,000t
Gold-Moly ratio -9999

Reference information

Study area name United States
References Albino (1995); Anonymous (1993a); Dilles and Proffett (1995); Einaudi (1982); Heatwole (1978); Steininger (1995); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Albino, G.V., 1995, Porphyry copper deposits of the Great Basin—Nevada, Utah, and adjacent California, in Pierce, F.W., and Bolm, J.G., eds, Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p. 267–296.
Anonymous, 1993a, Arimetco boosts MacArthur interest: The Northern Miner, May 31, 1993, p. 6.
Dilles, J.H., and Proffett, J.M., 1995, Metallogenesis of the Yerington batholith, Nevada, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p. 306–315.
Einaudi, M.T., 1982, Description of skarns associated with porphyry copper plutons, southwestern North America, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 139–183.
Heatwole, D.A., 1978, Controls of oxide copper mineralization, MacArthur property, Lyon County, Nevada, 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. 59–66. (Also available at http://www.arizonageologicalsoc.org/Default.aspx?pageId=1665440 and at http://archives.arizonageologicalsoc.org/digests/AGS_DIG11_S.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/.Steininger, R.C., 1995, Great Basin, exploration review: Society of Economic Geologists SEG Newsletter, no. 22, July, p. 26. (Also available at http://www.segweb.org/pdf/publications/newsletters/1995/SEG-Newsletter-22-1995-July.pdf.)