GMRAP ID | 39 |
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Alternate names | Moonlight Valley |
Tract name | Sierran Arc (003pCu9007) |
Site status | deposit |
Country | United States |
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State or province | California |
Geographic location | -120.853888889, 40.195 |
Geologic map unit | -120.853888889, 40.195 |
Nearby data |
Deposit type | Porphyry copper |
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Age (Ma) | 100Ma |
Age determination method | unknown |
Age range | 100 Ma |
Age reference | Singer and others (2008) |
Minerals | actinolite, azurite/malachite, bornite, carbonate, chalcocite, chalcopyrite, chlorite, chrysocolla, copper, covellite, epidote, galena, hematite, jamesonite, limonite, magnetite, molybdenite, pyrite, pyrrhotite, sericite, sphalerite, stibnite, tetrahedrite/tennantite, tourmaline |
Associated rocks | aplite, granite porphyry, quartz porphyry, serpentinite, andesite, agglomerate, alaskite, basalt, gabbro, granite, granodiorite, metasedimentary rocks, metavolcanic rocks, quartz diorite, quartz monzonite, schist |
Tectonic setting | mixed |
Stratigraphic age | Cretaceous |
Development status | Occurrence |
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Major commodities | Cu |
Tonnage (Mt) | 318Mt |
Cu grade (%) | 0.34% |
Au grade (g/t) | 0.05g/t |
Ag grade (g/t) | 3.2g/t |
Contained copper | 1,100,000t |
Gold-Moly ratio | -9999 |
Study area name | United States |
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References | Anderson (1931); Sheffield Resources Ltd. (2006); Smith (1970); Storey (1978); Singer and others (2008) |
Site reference | U.S. Geological Survey National Mineral Resource Assessment Team (2002) |