| Basis for focus area |
Mining district outlines from McLemore (2017). |
| Identified resources |
Historical production of copper, gold, lead, silver, tungsten, and zinc (see McLemore, 2017). |
| Production |
Silver Tail mine: about 5 tons of ore assaying 4% WO3 shipped in 1942; 50 tons of ore assaying 3% WO3 shipped in 1955. |
| Status |
Past mining and exploration. |
| Estimated resources |
Unknown. |
| Geologic maps |
Seager and others (1982), scale 1:125,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Middle Tertiary rhyolites in contact with Paleozoic limestone and dolomite. |
| Deposits |
Silver Tail mine (MRDS dep_id: 10011711), Bromide mine (MRDS dep_id: 10099716), Percha, Tierra Blanca. |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Samples contained up to 2020 ppb Au, up to 1310 ppm W, and up to 2800 ppm Te (see https://geoinfo.nmt.edu/staff/mclemore/projects/mining/REE/McLemoreMasterChem_v5.xlsx). |
| Geophysical evidence |
None. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Variable. |
| Authors |
Virginia T. McLemore. |
| New data needs |
Geologic mapping, chemical and mineralogical analyses, geophysics. |
| Geologic mapping and modeling needs |
Geologic mapping needed. |
| Geophysical survey and modeling needs |
High resolution, Rank 1 aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar complete. |
