Southwest Tintic

Porphyry copper deposit in Utah, United States

Names and other identifiers

Tract name Great Basin Tertiary (003pCu9013)
Site status deposit

Geographic location

Country United States
State or province Utah
Geographic location -112.125, 39.858055556
Geologic map unit -112.125, 39.858055556
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 36Ma
Age determination method unknown
Age range 37–34 Ma
Age reference Singer and others (2008)
Minerals actinolite, anhydrite/gypsum, biotite, chalcopyrite, chlorite, epidote, magnetite, molybdenite, pyrite, sericite, tourmaline
Associated rocks breccia, quartz monzonite porphyry, quartzite, limestone, andesite agglomerate, andesite flow, andesite porphyry, monzonite, quartz latite tuff
Tectonic setting postconvergence
Stratigraphic age Eocene

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 559Mt
Cu grade (%) 0.28%
Mo grade (%) 0.01%
Contained copper 1,600,000t
Gold-Moly ratio -9999

Reference information

Study area name United States
References Krahulec (1996); Norman and others (1991); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Krahulec, K.A., 1996, Geology and geochemistry of the SWT porphyry copper system, Tintic mining district, Juab County, Utah, in Field trip A of Green, S.M., and Struhsacker, Eric, eds., Geology and ore deposits of the American Cordillera—Field Trip Guidebook Compendium: Geological Society of Nevada Symposium, Reno/Sparks, Nev., April 10–13, 1995, p. 62–78.
Norman, D.K., Parry, W.T., and Bowman, J.R., 1991, Petrology and geochemistry of propylitic alteration at Southwest Tintic, Utah: Economic Geology, v. 86, p. 13–28. (Also available at, 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