Mine detail: Penn

Previously called 'Campo SecoCopper HillHeclaHinckleyPenn Chemical WorksSatellite'

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Location

Lat / long:

38.23019, -120.87491

Resource(M)

Primary:	Copper, Zinc
Secondary:	Gold, Lead, Silver
Ore:	Bornite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Galena, Gold, Malachite, Pyrite, Sphalerite, Tetrahedrite
Gangue:	Barite, Calcite, Chlorite, Quartz, Selenite, Sericite
Orebody form:	LENTICULAR
Discovery year:	1861

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	Medium
Development status:	Past Producer
Production years:	1861-1867, 1883-1896, 1899-1919, 1926, 1928, 1937, 1943-1946, 1948-1953, 1955-1956, 1958-1959
First production started:	1861
Last production ended:	1959

Geology

Host rock:	Amador Group
Host type:	Greenstone,Schist
Structure:	Faults; 3 Categories 1. Generally Steeply Dipping Faults, Strike Ne, Little Effect On Ore Body 2. Low-Angle Reverse Faults, N 30 W - N 30 E, 25 - 55 E 3. High-Angle, Along Certain Schistosity Planes Or At Contacts. Folds Plunge From 60 S - 85 N, Schistosity And Cleavage In Most Rocks - Schistosity Parallel To Bedding Dips Eastward 5 - 15 Degrees.
Tectonic:	Island Arc
Alteration processes:	Zones Of Sericitization, Silicification And Pyritization As Belts And Lenses In Metavolcanic And Intrusive Rocks.

References

MRDS	M020443
DEP	10033797
Reference	{Deposit:: CLARK, W. B., AND LYDON, P. A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA; COUNTY REPT. 2 ; CALIF. DIV. MINES AND GEOLOGY, P. 28 - 31}{Deposit:: HEYL, G. R., COX, M. W. AND ERIC, J. H., 1948 , PENN ZINC-COPPER MINE, CALAVERAS COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 61 - 84}{Production:: CLARK, W. B. & LYDON, P. A., 1962 , (SEE REF.)}
Reporter	Fraticelli, L. A. (Albers, J.)