Ithaca Peak

Porphyry copper (Cu-Mo) deposit in Arizona, United States

Names and other identifiers

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

Geographic location

Country United States
State or province Arizona
Geographic location -114.142649426, 35.362350767
Geologic map unit -114.142649426, 35.362350767
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Mo
Age (Ma) 73Ma
Age determination method unknown
Age range 73 Ma
Age reference Singer and others (2008)
Minerals anhydrite/gypsum, arsenopyrite, biotite, chalcocite, chalcopyrite, chlorite, epidote, ferrimolybdite, galena, goethite, hematite, jarosite, magnetite, molybdenite, pyrite, rutile, sericite, siderite, sphalerite, tetrahedrite, zeolite
Associated rocks aplite, breccia, quartz latite, quartz monzonite porphyry, quartz porphyry, rhyolite, amphibolite, diorite, gneiss, granite, pegmatite, quartzite, schist
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Past Producer
Major commodities Cu
Tonnage (Mt) 877Mt
Cu grade (%) 0.143%
Mo grade (%) 0.035%
Au grade (g/t) 0.027g/t
Ag grade (g/t) 2.5g/t
Contained copper 1,250,000t
Gold-Moly ratio 0.77

Reference information

Comments Production in 1964–1981 of 92.5 Mt at 0.3% Cu, 0.027% Mo, 1.68 g/t Ag; 2006 resource (0.2% Cu equiv. cut-off) of 784 Mt at 0.125% Cu, 0.036% Mo, 2.6 g/t Ag. 10% covered.
Study area name United States
References Bouse and others (1999); Cook and Martin (1991); Eidel and others (1968); Lang and Eastoe (1988); Long (1995); Titley (1993); Wilkinson and others (1982); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
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
Cook, A., and Martin, K., 1991, Mineral Park porphyry copper deposit, in Hollister, V.F., ed., Case histories of mineral discoveries: Littleton, Colo., Society for Mining, Metallurgy, and Exploration, Inc., v. 3, p. 35–37.
Eidel, J.J., Frost, J.E., and Clippinger, D.M., 1968, Copper-molybdenum at Mineral Park, Mohave County, Arizona, in Ridge, J.D., ed., Ore deposits of the United States, 1933–1967: New York, American Institute of Mining and Metallurgical Engineers, v. 2, p. 1258–1281.
Lang, J.R., and Eastoe, C.J., 1988, Relationships between a porphyry Cu-Mo deposit, base and precious metal veins, and Laramide intrusions, Mineral Park, Arizona: Economic Geology, v. 83, p. 551–567. (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.
Wilkinson, W.H., Jr., Vega, L.A., and Titley, S.R., 1982, Geology and ore deposits at Mineral Park, Mohave County, Arizona, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 523–541.