| Basis for focus area |
Limestone of probable Paleozoic or Mesozoic age from the California state geologic map that hosts the Meeke mine and occurrences. Shown as PZm marble on 1:24,000-scale maps of the area. Skarn mineralization in marble pendants and stoped blocks within the Cretaceous Tejon Lookout Granite. |
| Identified resources |
Identified resources and historical production of tin. |
| Production |
Meeke mine produced 5 tons of hand-sorted ore containing 1.93 tons Sn in 1944. |
| Status |
Past mining. |
| Estimated resources |
District in situ ore reserve estimates in 1945: 3,740 short tons of 1.0 to 2.0% Sn; 3,450 tons of 0.5 to 1% Sn; and 25,600 tons of 0.1 to 0.3% Sn (Wiese and Page, 1945). |
| Geologic maps |
Olson and Swanson (2017), scale 1:24,000; Olson and Swanson (2019), scale 1:24,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Skarn mineralization in marble pendants and stoped blocks with the Cretaceous Tejon Lookout Granite. |
| Deposits |
Meeke mine (Hogan-Mallery tin mine (MRDS dep_id: 10212342; USMIN Site ID: CA00067), Upper Butler (USMIN Site ID: CA00068), Crowbar Gulch (USMIN Site ID: CA00069). |
| Evidence from mineral occurrences |
MRDS; USMIN. |
| Geochemical evidence |
Cassiterite occurs with scheelite, powellite, pyrite, chalcopyrite, arsenopyrite, molybdenite, magnetite, epidote, tourmaline, ludwigite, amphibole, garnet, phlogopite, calcite, and quartz. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Magnetite tactite. |
| Comments |
Cassiterite in limonitic gossan at the Meeke mine. Drilled by the U.S. Bureau of Mines and sampled by USGS. |
| Cover thickness and description |
Exposed. |
| Authors |
Jane M. Hammarstrom. |
| New data needs |
None requested at this time. |
| Geologic mapping and modeling needs |
None requested at this time. |
| Geophysical survey and modeling needs |
None requested at this time. |
| Digital elevation data needs |
Lidar complete. |
