Mine detail: Meadow Lake (Excelsior)

Previously called ''

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Location

Lat / long:

39.39569, -120.50682

Resource(M)

Primary:	Gold
Secondary:	Silver
Tertiary:	Copper, Zinc, Lead, Iron
Ore:	Gold, Quartz, Tourmaline, Epidote, Calcite
Gangue:	Granite
Orebody form:	Tabular, lens
Discovery year:	1863

Production

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

Geology

Host rock:	Sierra Nevada Batholith
Host type:	Granodiorite,Granite
Tectonic:	Magmatic arc
Alteration processes:	Intense alteration by segregation or replacement in granitic - granodioritic country rock. Alteration characterized by bluish quartz, black tourmaline (tourmalinization), epidote, calcite, and other minor gangue minerals

References

DEP	10310646
Reference	{Deposit:: Clark, W.B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 89.}{Deposit:: Crawford, J.J., 1896, Nevada County, Excelsior Mine: California State Mining Bureau Report 13, p. 243.}{Deposit:: Irelan, W., Jr., 1888, Nevada County, Meadow Lake district: California State Mining Bureau Report 8, p. 454.}{Deposit:: Lindgren, W., 1897, Truckee folio, California: U.S. Geological Survey Atlas of the U.S., Folio 39, 8 p.}{Deposit:: Lindgren, W., 1900, Colfax folio, California: U.S. Geological Survey Atlas of the U.S., Folio 66, 10 p.}{Deposit:: Logan, C.A., 1924, Nevada County, Meadow Lake district: California State Mining Bureau Report 20, p. 355-362.}{Deposit:: MacBoyle, E., 1919, Nevada County, Meadow Lake district, Excelsior Mine: California State Mining Bureau Report 16, p. 33-37, 168.}{Deposit:: Wisker, A. L., 1936, The gold-bearing veins of the Meadow Lake district, Nevada County: California Journal of Geology, v. 32, p. 189-204.}{Deposit:: Additional information on the Meadow Lake District is contained in File No. 331-9362 (CGS Mineral Resources Files, Sacramento)}
Reporter	Downey, Cameron (Higgins, Chris, T.), Schruben, Paul G.