Lone Tree Mine, Green Mountain, Green Mountain District (Ben Hur District), Mariposa Co., California, USA
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Mineralization is a vein deposit with 2 veins. The 2 well-defined veins within the mineralized zone are separated by wall rocks which are more or less mineralized. The ore body is 91.44 meters wide. Controls for ore emplacement included a shear zone. Carbonate ore occured to a depth of 150 feet with sulfides below that. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings with an overall depth of 60.96 meters. Several shafts between 25 and 100 feet deep, one main shaft 200 feet deep with drifts and stopes on the 150 level existed in 1908.
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References
Eric, J.C. (1948), Copper in California: California Division of Mines Bulletin 144: 268.
Bowen, O.E., Jr. & G.H. Cliffton (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 228-229.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10076894 & 10285909.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060430557.
Bowen, O.E., Jr. & G.H. Cliffton (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 228-229.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10076894 & 10285909.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060430557.