| Basis for focus area |
MRDS producer and past producers. |
| Identified resources |
Identified feldspar and mica resources. Historical production of feldspar and mica. |
| Production |
Many tons of crude mica and a few tons of potash feldspar were recovered from the Rose Dawn mine. |
| Status |
Past mining. |
| Estimated resources |
Estimated to be only a few 100 tons each of scrap mica and microcline as reserves at the Star Girl mine. |
| Geologic maps |
Wobus and others (1979), scale 1:62,500. |
| Geophysical data |
Inadequate Rank 2 aeromagnetic coverage over 50% of focus area and Rank 5 over remainder; Rank 3 aeroradiometric coverage. |
| Favorable rocks and structures |
Pegmatite. |
| Deposits |
Climax Mica Lode, Lower South mine (MRDS dep_id: 10013523), Rose Dawn mine (MRDS dep_id: 10013527), Star Girl mine, Upper South mine. |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Beryl is reported as a secondary or tertiary mineral in some of the feldspar-mica mines. |
| Geophysical evidence |
No data. |
| Evidence from other sources |
No data. |
| Comments |
Pegmatites were mined mostly for feldspar and mica, with minor beryl. Niobium, Sc, and Ta inferred from mineral system/deposit type table (Hofstra and Kreiner, 2020). |
| Cover thickness and description |
No cover. |
| Authors |
David A. Ponce, Nora K. Foley, Michael K. O'Keeffe, Joshua M. Rosera. |
| New data needs |
1:24,000 scale geologic mapping. |
| Geologic mapping and modeling needs |
1:24,000 scale geologic mapping at Thirtyone Mile Mountain and the Cover Mountain quadrangles. |
| Geophysical survey and modeling needs |
High resolution, Rank 1 aeromagnetic and aeroradiometric surveys, although this may not work well with this deposit type. |
| Digital elevation data needs |
Lidar adequate. |
