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Lower Butler prospect, Tejon Tin project (Gorman Tin project), Lebec, Gorman District, Tehachapi Mts, Kern Co., California, USA

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Latitude & Longitude (WGS84): 34° 50' 11'' North , 118° 43' 22'' West
Latitude & Longitude (decimal): 34.8363888889, -118.722777778
A Sn occurrence/prospect located in sec. 30, T9N, R17W, MDM, 12.8 km (8.0 miles) E of Lebec and 12.6 km (7.8 miles) ENE of Gorman (Los Angeles County), W of the South portal No. 4 of the aquaduct. MRDS database stated accuracy for this location is 10 meters. Located 2,000 feet E of the Upper Butler prospect, and within a few hundred feet of the edge of valley alluvium.

Mineralization is a contact metasomatic Sn deposit hosted in limestone. Two small, iron-rich tactite bodies occur in bleached, recrystallized limestone adjacent to granite. In the limestone, a strong set of joints strike E and dip steeply S. The granite does not crop out, but float is present. Deeply weathered tactite is mainly massive brown garnet with magnetite, hematite and limonite. Thin films of malachite and chrysocolla coat fractures in the N ore body. Cassiterite is rare. Associated rocks include Late Cretaceous granite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges) and/or limestone of probable Paleozoic or Mesozoic age.

Workings include surface openings.

Analytical data results: ORE GRADE ASSAYED TRACE TO 1.9 PERCENT TIN

Mineral List

7 entries listed. 5 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Bedford, R.H. & F.T. Johnson (1946), Survey of tin in California: US Bureau Mines Report of Investigation RI 3876: 7.

Wiese, J.H. & L.R. Page (1946), Tin deposits of the Gorman district, Kern County, California: California Division Mines Report 42(1) (January, 1946): 51.

Troxel, Bennie Wyatt & P.K. Morton (1962), Mines and mineral resources of Kern County, California: California Division Mines & Geology County Report 1, 370 pp.: No. 545, p. 293.

Pemberton, H. Earl (1983), Minerals of California: 175 (map 4-11).

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10033754 & 10285340.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060291030.

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