| Basis for focus area |
Metallic mineral deposits occur as skarns, fissure veins, and replacement veins. Intrusions and skarn deposits along contacts between intrusions and carbonate rocks. |
| Identified resources |
Historical major production of lead, silver, and zinc, with minor production of copper, gold, and manganese. |
| Production |
Cumulative production from the Castle Mountain district was about 38,000,00 lbs Pb, 2,150,000 troy oz Ag, and 147,000 lbs Zn (Winters, 1968). |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Reynolds and Brandt (2006), scale 1:100,000; McDonald and others (2005), scale 1:100,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Intrusions and related skarns. |
| Deposits |
Yellowstone mine (MRDS dep_id: 10070481), Powderly mine (MRDS dep_id: 10246160), Cumberland mine (MRDS dep_id: 10105639). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Winters (1968) published two soil geochemical anomaly maps for base metals. Zinc is elevated in places (> 300 ppm). No other elements are specified. |
| Geophysical evidence |
None. |
| Evidence from other sources |
Skarns and associated intrusions are known in other districts to have resources of critical minerals. |
| Comments |
Exploration was only for precious and base metals hosted by skarns. Future exploration could be focused on the intrusive bodies and related skarn deposits. |
| Cover thickness and description |
Partially exposed at the surface and extends to unknown depth; some glacial cover. |
| Authors |
Stanley L. Korzeb, Kaleb C. Scarberry, Jay A. Gunderson, Joshua M. Rosera. |
| New data needs |
High resolution geophysics, whole-rock geochemistry for all critical minerals, geologic mapping, lidar. |
| Geologic mapping and modeling needs |
1:24,000 scale geologic mapping. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar inadequate. |
