GMRAP ID | 26 |
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Alternate names | Crater Mountain |
Tract name | Northern Rocky Mountains (003pCu9004) |
Included sites | Birthday |
Site status | deposit |
Country | United States |
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State or province | Wyoming |
Geographic location | -109.630452245, 44.019333285 |
Geologic map unit | -109.630452245, 44.019333285 |
Nearby data |
Deposit type | Porphyry copper |
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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 |
Development status | Occurrence |
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Major commodities | Cu |
Tonnage (Mt) | 59Mt |
Cu grade (%) | 0.35% |
Contained copper | 210,000t |
Gold-Moly ratio | -9999 |
Study area name | United States |
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References | Fisher (1977); Hausel (1989); Singer and others (2008) |
Site reference | U.S. Geological Survey National Mineral Resource Assessment Team (2002) |