| Basis for focus area |
Tin and W occur in quartz veins and pegmatites. USMIN location for Silver Hill mine and several MRDS records surrounded with a 10 km buffer. |
| Identified resources |
Historical production of tin. |
| Production |
Mining during 1907-1912 produced 7 metric tons of Sn. |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Derkey and others (1999), scale 1:24,000. |
| Geophysical data |
Adequate aeromagnetic coverage. Inadequate aeroradiometric coverage. |
| Favorable rocks and structures |
Mesozoic sillimanite-andalusite pegmatite and feldspar-quartz pegmatite (Page, 1942). |
| Deposits |
Silver Hill mine (MRDS dep_id; 10204272). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Unknown. |
| Geophysical evidence |
None. |
| Evidence from other sources |
Unknown. |
| Comments |
Cassiterite was discovered in 1906; trenching and exploration followed with no work after 1912. Eight small Sn-bearing quartz veins were prospected by the U.S. Bureau of Mines. |
| Cover thickness and description |
20 ft loess. |
| Authors |
Daniel W. Eungard. |
| New data needs |
Deposit model, drilling. |
| Geologic mapping and modeling needs |
Mapping complete. |
| Geophysical survey and modeling needs |
High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys. |
| Digital elevation data needs |
Lidar complete. |
