| Basis for focus area |
Tungsten, Cu, Au, and Ag hosted in limestone-hosted skarns. Focus areas are the contacts between the granodiorite intrusions and limestone. |
| Identified resources |
Historical production of copper, gold, lead, and silver. |
| Production |
Indian Queen mine (1902-1949): 308 oz Au, 43,744 oz Ag, 1,771,824 lbs Cu, and 5,464 lbs Pb. |
| Status |
Past mining. Past exploration for W resources by surface sampling of dumps and prospect pits in the 1950s. |
| Estimated resources |
Unknown. |
| Geologic maps |
Loen and Pearson (1989), scale 1: 250,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Skarn developed along contact between Mission Canyon Limestone and Pioneer batholith. |
| Deposits |
Indian Queen mine (MRDS dep_id: 10078274), Greenstone mine (MRDS dep_id: 10102054). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Scheelite was reported from prospect pits and adits that were not developed into operating mines. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
None. |
| Comments |
Skarns forming pods along the contact with granodiorite crop out on the surface and were explored by shallow prospects for W and Cu resources. A W resource was found at the Stanfield prospect and an attempt was made to put the property into production. A grade of 0.02 to 0.21% tungsten oxide was reported by Geach (1972). |
| Cover thickness and description |
Exposed at the surface. |
| Authors |
Stanley L. Korzeb. |
| New data needs |
High resolution geophysics, lidar, geochemistry, geologic mapping, trace element analysis on skarn related intrusions, and skarns for critical elements. |
| Geologic mapping and modeling needs |
Detailed mapping of the known skarns and intrusive contacts could be used to develop a geologic model for the district. Geophysics may uncover skarn deposits that do not crop out on the surface and find extension of the known skarns. |
| Geophysical survey and modeling needs |
High resolution geophysical survey to help identify exploration targets that are not exposed on the surface. |
| Digital elevation data needs |
Lidar inadequate. |
