Mine detail: Princeton Mine

Previously called 'Lewis Brothers (Northwest Extension of Princeton)Princeton ExtensionNew Princeton'

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Location

Lat / long: 37.50065, -120.04719

Resource(M)

Primary: Gold
Secondary: Silver
Ore: Gold, Pyrite
Gangue: Quartz
Orebody form: Tabular
Discovery year: 1852

Production

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

Geology

Host rock:Mariposa Formation
Host type:Slate
Structure:The vein system follows what is interpreted to be a reverse fault hosted in slate., Mineralized quartz veins are associated with subsidiary faults of the Melones Fault Zone
Alteration processes:None specifically reported, although there is mention that slate is severely bleached and hydrothermally altered near the vein in the New Princeton workings.

References

DEP10310670
Reference{Deposit:: Bateman, P.C. and Krauskopf, K.B., 1987, Geologic map of the El Portal Quadrangle, west-central Sierra Nevada, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1998, scale 1:62,500.}{Deposit:: Bowen, O.E., Jr. and Gray, C.H., Jr., 1957, Mines and mineral resources of Mariposa County, California: California Journal of Mines and Geology, v. 53, nos. 1-2, p. 35-343.}{Deposit:: Castello, W.O., 1921, Mariposa County: California State Mining Bureau, 17th Annual Report of the State Mineralogist, p. 86-143.}{Deposit:: Clark, W. B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 94-96.}{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. 72-73.}{Deposit:: Earhart, R.L., 1988, Geologic setting of gold occurrences in the Big Canyon area, El Dorado County, California: U.S. Geological Survey Professional Paper 1576, 13 p.}{Deposit:: Evans, J.R. and Bowen, O.E., 1977, Geology of the southern Mother Lode, Tuolumne and Mariposa counties, California: California Division of Mines and Geology Map Sheet 36, scale 1:24,000.}{Deposit:: Julihn, C.E., and Horton, F.W., 1940, Mineral industries survey of the United States - Mines of the southern Mother Lode Region, Part II - Tuolumne and Mariposa counties: U.S. Bureau of Mines Bulletin 424, 179 p.}{Deposit:: Kistler, R.W., Dodge, F.C.W. and Silberman, M.L., 1983, Isotopic studies of mariposite-bearing rocks from the south-central Mother Lode, California: California Geology, v. 36, no. 9, p. 201-203.}{Deposit:: Knopf, A., 1929, The Mother Lode system of California: U. S. Geological Survey Professional Paper 157, 88 p.}{Deposit:: Koschmann, A.H., and Bergendahl, M.H., 1968, Principal gold-producing districts of the United States: U. S. Geological Survey Professional Paper 610, 283 p.}{Deposit:: Krauskopf, K.B., 1985, Geologic map of the Mariposa quadrangle, Mariposa and Madera Counties, California: U.S. Geological Survey Geologic Quadrangle Map GQ-1586, scale 1:62,500.}{Deposit:: Landefeld, L.A., 1990, The geology of the Mother Lode gold belt, Foothills metamorphic belt, Sierra Nevada, California in Landefeld, L.A. and Snow, G.G., editors, Yosemite and the Mother Lode gold belt: Geology, tectonics, and the evolution of hydrothermal fluids in the Sierra Nevada of California: American Association of Petroleum Geologists, Pacific Section, Guidebook 68, p. 117-124.}{Deposit:: Logan, C.A., 1935, Mother Lode gold belt of California: California Division of Mines Bulletin 108, 240 p.}{Deposit:: Moore, L., 1968, Gold resources of the Mother Lode Belt, El Dorado, Amador, Calaveras, Tuolumne, and Mariposa counties, California: U.S. Bureau of Mines Technical Progress Report 5, p. 1-22.}{Deposit:: Schweickert, R.A., Hanson, R.E., and Girty, G.H., 1999, Accretionary tectonics of the Western Sierra Nevada Metamorphic Belt in Wagner, D.L. and Graham, S.A., editors, Geologic field trips in northern California: California Division of Mines and Geology Special Publication 119, p. 33-79.}{Deposit:: Strand, R.G., 1967, Mariposa Sheet: California Division of Mines and Geology Geologic Map of California, scale 1:250,000.}{Deposit:: Wagner, D.L., Bortugno, E.J., and McJunkin, R.D., 1990, Geologic map of the San Francisco-San Jose Quadrangle, California: California Department of Conservation, Division of Mines and Geology Regional Geologic Map Series, Map No. 5A, scale 1:250,000.}{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.}
ReporterHiggins, Chris T., Schruben, Paul G.