| Basis for focus area |
Historical mining district (now a wilderness area). |
| Identified resources |
Historical production of copper, gold, lead, silver, and zinc. |
| Production |
Greyhound mine (1916-1981): 5,689 tons of ore; 42.43 oz Au; 13,148 oz Ag; 682 lbs Cu; 26,994 lbs Pb, and 4,511 lbs Zn (Mitchell, 1997a). |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Fisher and Johnson (1984), scale 1:175,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Skarns commonly are developed in carbonate-rich rocks adjacent to Tertiary plutons in the southern part of the study area. Quartz-carbonate fissure veins cutting intrusive rocks can carry sulfides. |
| Deposits |
Boulder Creek deposit (MRDS dep_id: 10071179), Greyhound Ridge (MRDS dep_id: 10216544), Bonanza mine (MRDS dep_id: 10071091), Billy John 1-2 (MRDS dep_id: 10216548), Confidence mine (MRDS dep_id: 10071176), Deer Trail mine (MRDS dep_id: 10070959). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Fisher, May and McIntyre (1983). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Exposed at the surface. |
| Authors |
Virginia S. Gillerman, Reed S. Lewis, Christopher A. Tate. |
| New data needs |
Geophysics. |
| Geologic mapping and modeling needs |
None requested at this time. |
| Geophysical survey and modeling needs |
High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys. |
| Digital elevation data needs |
Lidar in progress over central part of focus area; incomplete over rest. |
