Mine detail: Angels Mine

Previously called 'Southwell MineBig Mine'

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Location

Lat / long: 38.0755, -120.54738

Resource(M)

Primary: Gold
Secondary: Silver
Ore: Gold, Pyrite, Quartz, Calcite, Talc, Ankerite, Sericite
Orebody form: Tabular, pinch and swell
Discovery year: 1850

Production

Operation type: Underground
Deposit type: Hydrothermal vein
Development status: Past Producer

Geology

Host rock:Calaveras Complex
Host type:Amphibole Schist
Structure:Melones Fault zone, Bear Mountains fault zone, Melones fault zone
Tectonic:Magmatic arc
Alteration processes:Ankeritic and sericitic alteration of wall rock with disseminated aurtiferous pyrite mineralization

References

DEP10310584
Reference{Deposit:: Brown, J.A., 1890, Calaveras County, Angels Mine, California State Mining Bureau, 10th Annual Rport of the State Mineralogist, p. 151.}{Deposit:: Clark, L.D., 1970, Geology of the San Andreas 15-minute quadrangle, Calaveras County, California: California Division of Mines and Geology Bulletin 195, 23 p.}{Deposit:: Clark, W. B., 1970, Gold districts of California: California Divisions of Mines and Geology Bulletin 193, p. 25-28.}{Deposit:: Clark. W. B., and Lydon, P.A., 1962, Mines and mineral resources of Calaveras County, California: California Division of Mines and Geology County Report No. 2, p. 40.}{Deposit:: Eric, J.H., Stromquist, A.A., and Swinney, C.M., 1955, Geology and mineral deposits of the Angels Camp and Sonora quadrangles, Calaveras and Tuolumne counties, California: California Division of Mines Special Report 41, 55 p.}{Deposit:: Knopf, A., 1929, The Mother Lode system of California: U. S. Geological Survey Professional Paper 157, 88 p.}{Deposit:: Logan, C. A., 1921, Calaveras County, Angels Mine: California State Mining Bureau, 17th Report of the State Mineralogist, p. 420.}{Deposit:: Tucker, W.B., 1914, Calaveras County, Angels Mine: California State Mining Bureau, 14th Annual Report of the State Mineralogist, p. 68-69.}{Deposit:: Zimmerman, J.E., 1983, The Geology and structural evolution of a portion of the Mother Lode Belt, Amador County, California: unpublished M.S. thesis, University of Arizona, 138 p.}
ReporterDowney, Cameron (Higgins, Chris, T.), Schruben, Paul G.