Williamson Rosenthal and Mertz Mine (Williamson Rosenthal and Mertz claims), Moccasin Peak area, Tuolumne Co., California, USA
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Mineralization is hosted in Late Jurassic dunite. Local alteration is serpentinization of the host rock. The deposit occurs in the southern part of the westernmost of 2 serpentine belts which trend NW-SE across the county. The belt is exposed over an area 30 km by 6 km.Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include unspecified surface and underground openings. Some development work done on the claims but workings could not be found in 1945.
Production information: Ten tons of ore were mined but not shipped.
Mineral List
2 entries listed. 1 valid mineral. 1 erroneous literature entry.
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References
Cater, F.W., Jr. (1948a), Chromite deposits of Tuolumne and Mariposa Counties, California: California Division Mines Bulletin 134, part 3, chapter 1: 15-16, 29, Pl. 1.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 160 (map 4-9).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077885 & 10238950.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061090109.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 160 (map 4-9).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077885 & 10238950.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061090109.