| Basis for focus area |
Precambrian igneous and metamorphic rock complex from the California state geologic map (unit pCc) that covers the Cattle Canyon and Andrew tungsten mine area. |
| Identified resources |
Identified resources and historical production of tungsten. |
| Production |
1950-1982 produced 1,100 kg of WO3 concentrate averaging 38.29% WO3. |
| Status |
Past mining. |
| Estimated resources |
Resources in 1982: 238,210 metric tons of W in Measured, Indicated, and Inferred resources in talus and veins. |
| Geologic maps |
Dibblee and Minch (2002), scale 1:24,000; Evans and others (1982), scale 1:48,000. |
| Geophysical data |
Magnetic high (523 on Plate 11) over part of the focus area correlated with a quartz diorite and gneissic rock complex (Evans and others, 1982). |
| Favorable rocks and structures |
Scheelite veins and skarn hosted in augen gneiss, biotite gneiss, diorite, granodiorite, porphyritic dikes, and quartz monzonite. |
| Deposits |
Andrew tungsten mine (MRDS dep_id: 10115273; USMIN Site ID: CA00062), Alron #1, Alron #2, Tiffany-Andrew Group, 4 Hi #1. |
| Evidence from mineral occurrences |
MRDS; USMIN; Evans and others (1982). |
| Geochemical evidence |
Geochemical analyses done as part of a wilderness study (Evans and others, 1982). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Focus area included mainly for historical purposes. Part of the San Gabriel Mountains National Monument (GAP status code 3 - subject to extractive use). Relatively inaccessible rugged area of high relief, fire-prone area. Andrew Curtis mine abandoned. |
| Cover thickness and description |
Underground mine and exposed scheelite-bearing rocks. |
| 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. |
