GMRAP ID | 53 |
---|---|
Tract name | Eastern Alkaline Province (003pCu3010x) |
Site status | deposit |
Country | United States |
---|---|
State or province | Colorado |
Geographic location | -108.088055556, 37.406944444 |
Geologic map unit | -108.088055556, 37.406944444 |
Nearby data |
Deposit type | Porphyry copper |
---|---|
Age (Ma) | 68Ma |
Age determination method | unknown |
Age range | 70–65 Ma |
Age reference | Singer and others (2008) |
Minerals | arsenopyrite, bornite, calcite, chalcocite, chalcopyrite, chlorite, domeykite, enargite, fluorite, galena, hematite, kaolinite, magnetite, marcasite, pyrite, sericite, sphalerite, tennantite |
Associated rocks | breccia, pegmatite, syenite, trachyte dike, limestone, monzonite, conglomerate, monzonite porphyry, diorite porphyry, sandstone, shale |
Tectonic setting | postconvergence |
Stratigraphic age | Late Cretaceous |
Development status | Occurrence |
---|---|
Major commodities | Cu |
Tonnage (Mt) | 200Mt |
Cu grade (%) | 0.4% |
Ag grade (g/t) | 5g/t |
Contained copper | 800,000t |
Gold-Moly ratio | -9999 |
Comments | 10200 ppb Au, 100170 ppb Pt. |
---|---|
Study area name | United States |
References | Armstrong (1969); Cunningham and others (1994); Eckel (1949); Niemuth (1994); Werle and others (1984); Singer and others (2008); Singer and others (2005) |
Site reference | U.S. Geological Survey National Mineral Resource Assessment Team (2002) |