Mine detail: Penn Mine

Previously called 'Campo Seco'

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Location

Lat / long: 38.23075, -120.8741

Resource(M)

Primary: Silver, Gold, Lead, Zinc, Copper
Ore: Pyrite, Sphalerite, Bornite, Chalcopyrite
Gangue: Quartz, Calcite, Barite, Schist
Orebody form: Pod, lens
Discovery year: 1861

Production

Operation type: Surface-Underground
Deposit type: Stratabound exhalative
Development status: Past Producer

Geology

Host rock:Gopher Ridge Volcanics
Host type:Porphyry,Tuff
Structure:Bear River and Melones fault zones
Tectonic:Magmatic arc
Alteration processes:Sericitic and silicic alteration of wall rock metavolcanics to sericite and chlorite schist.

References

DEP10310664
Reference{Deposit:: Aubury, L.E., 1908, Copper resources of California: California Mining Bureau Bulletin 50, p. 228-245.}{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. 28-31.}{Deposit:: Franklin, J.M., Lydon, J.W., and Sangster, D.F., 1981, Volcanic-associated massive sulfide deposits: Economic Geology Seventy-fifth Anniversary Volume, p. 485-627.}{Deposit:: Hanks, H.G., 1884, Copperopolis, Campo Seco, Satellite, and Sunrise copper mines: California Mining Bureau Report 4, p. 148-151.}{Deposit:: Heyl, G.R., Cox, Manning, W., and Eric, J.H., 1948, Penn zinc-copper mine, Calaveras County, California: California Division of Mines Bulletin 144, p. 61-84.}{Deposit:: Hutchinson, R.W., 1973, Volcanogenic sulfide deposits and their metallogenic significance: Economic Geology, v. 68, p 1223-1246.}{Deposit:: Irelan, W.R., Jr., 1888, Calaveras County: California Mining Bureau Report 8, p. 121-157.}{Deposit:: Kemp, W. R., 1982, Petrochemical affiliations of volcanogenic massive sulfide deposits of the Foothill CU-Zn belt, Sierra Nevada, California: University of Nevada - Reno, unpublished Ph.D. thesis, 458 p.}{Deposit:: Lambert, I.B., and Sato, T., 1974, The Kuroko and associated ore deposits of Japan - A review of their features and metallogenesis: Economic Geology, v. 69, p. 1215-1236.}{Deposit:: Peterson, J. A., 1985, Geologic map of the Penn Mine, Calaveras County, California: U. S. Geological Survey Miscellaneous Field Studies Map MF-1797, 2 sheets.}{Deposit:: Peterson, J. A., 1985, Geochemical analyses of rock samples collected at the Penn Mine, Calaveras County, California: U. S. Geological Survey Open-File report 85-588, 17 p.}{Deposit:: Sato, T., 1971, Physiochemical environment of Kuroko mineralization at Uchinotai Deposit of Kosaka Mine, Akita Prefecture: Society of Mining Geol. of Japan Special Issue no. 2, p. 137-144.}{Deposit:: Schmidt, J.M., 1978, Volcanogenic massive sulfides at Campo Seco (Calaveras County), California: Stanford University, unpublished M.S. thesis, 104 p.}{Deposit:: Tucker, W.B., 1914, Calaveras County - Penn Copper Mine: California State Mining Bureau, 14th Annual Report of the State Mineralogist, p. 59-62.}{Deposit:: Wiebelt, F.J., and Ricker, S., 1948, Penn mine slag dump and mine water, Calaveras County, California: U.S. Bureau of Mines Report of Investigations 4224, 6 p.}{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.