Porphyry copper deposit in Wyoming, United States

Names and other identifiers

Alternate names Crater Mountain
Tract name Northern Rocky Mountains (003pCu9004)
Included sites Birthday
Site status deposit

Geographic location

Country United States
State or province Wyoming
Geographic location -109.630452245, 44.019333285
Geologic map unit -109.630452245, 44.019333285
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 28Ma
Age determination method unknown
Age range 31–26 Ma
Age reference Singer and others (2008)
Minerals arsenopyrite, azurite/malachite, biotite, bornite, carbonate, chalcocite, chalcopyrite, chlorite, clay minerals, epidote, ferrimolybdite, galena, gold, jarosite, limonite, magnetite, molybdenite, pyrite, sericite, sphalerite, tetrahedrite
Associated rocks andesite porphyry, dacite, dacite porphyry, rhyodacite porphyry, andesite, basalt, conglomerate, granodiorite, sandstone, trachyandesite, volcanic breccia, volcaniclastics
Tectonic setting continental margin
Stratigraphic age Oligocene

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 59Mt
Cu grade (%) 0.35%
Contained copper 210,000t
Gold-Moly ratio -9999

Reference information

Study area name United States
References Fisher (1977); Hausel (1989); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)