| Basis for focus area |
Tungsten veins, district outline from USMIN location polygon ID00049. |
| Identified resources |
Historical production of copper, gold, lead, silver, tungsten, and zinc. |
| Production |
Ima mine (1934-1982): 1,813,758 lbs Cu, 20,581 lbs Zn, 1,296,358 troy oz Ag, 302 troy oz Au, 2,921,509 lbs Pb, and 198,330 short ton units WO3 for a calculated contained 1,426 metric tons W (Mitchell, 1999). |
| Status |
Past mining. |
| Estimated resources |
Ima mine (1999): Contained 670 tons Cu, 700 tons Zn, 670,000 troy oz Ag, 770 tons Pb, and 1,800 tons WO3 (Mitchell, 1999). |
| Geologic maps |
Callaghan and Lemmon (1943, plate 1), scale 1:7,500. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Favorable rock types are Paleozoic carbonates along contacts with granitic intrusions of the Mount Torrey batholith. |
| Deposits |
Ima mine (MRDS dep_id: 10071993; USMIN Site_ID: ID00049). |
| Evidence from mineral occurrences |
MRDS; USMIN. |
| Geochemical evidence |
Ore minerals at the Ima mine were anglesite, bornite, cerargyrite, chalcocite, chalcopyrite, covellite, cuprite, galena, huebnerite, malachite, molybdenite, pyromorphite, scheelite, sphalerite, and tetrahedrite; gangue minerals included calcite, fluorite, limonite, microcline, muscovite, pyrite, quartz, siderite, mica, and orthoclase. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Molybdenite mineralization at depth. Significant historical tungsten producer. |
| Cover thickness and description |
Exposed at the surface. |
| Authors |
Virginia S. Gillerman, Reed S. Lewis, Christopher A. Tate. |
| New data needs |
Updated geologic mapping, high resolution geophysics. |
| Geologic mapping and modeling needs |
Updated geologic mapping. |
| Geophysical survey and modeling needs |
High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys. |
| Digital elevation data needs |
Lidar in progress. |
