Latitude: 38°26'22"N
Longitude: 122°28'16"W
A former Hg mine located in sec. 24, T7N, R6W (MD), about 7 miles W of Oakville. Owned by Mr. James Doherty. Discovered 1865. Operated 1873, 1915 - 1918, 1929 - 1934, 1936 - 1939, and 1942.
Mineralization is hosted in serpentinite. Aphanitic volcanic rock is the associated unit. The ore bodies are pods striking N50W, dipping SW at 10.97 meters thick, 91.44 meters wide and 53.34 meters long. Alteration is local as silica alteration of serpentine. Ore control was changes in fault attitudes and brecciation of the silica-carbonate rock.
Workings include underground openings totaling 16615.44 meters in length and 76.2 meters deep.
Production data are found in U.S.Bureau of Mines file data. Ore was more than 5-12 pounds/ton (4,292 g/mt).
References
Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 80-81, 85.
Ransome, Alfred Leslie & J.L. Kellogg (1939), Quicksilver resources of California: California Division Mines Report 35: 410.
Fix, A.A. & C.M. Swinney (1949), Quicksilver deposits of the Oakville district, Napa County, California: California Journal of Mines and Geology: 45: 31-46.
Holmes, G.H. (1965) Mercury in California. US Bureau of Mines Information Circular 8252.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 260.
Pemberton, H. Earl (1983), Minerals of California: 118 & 120.
USGS MRDS database (2005), loc. file ID #10040858.
Bailey, E.H., USGS, personal files.
Mineral List
5 entries listed. 4 valid minerals.
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