Commodities
PrimaryCopper, Zinc
SecondaryGold, Lead, Silver
Commodity typeM
Deposit
Deposit typeReplacement
Model184: Massive sulfide, kuroko
Deposit sizeM
WorkingsSurface/Underground
Orebody formLENTICULAR
Ore control1. Belts Of Sericitization And Silification, 2. Areas Of Bowing And Buckling Normal To Schistosity, 3. Intersections Of High-Angle Schistosity Faults With Low Angle Reverse Faults, 4. Small Tight And Unsystematically Oriented Schistosity Folds.
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Galena, Gold, Malachite, Pyrite, Sphalerite, Tetrahedrite
GangueBarite, Calcite, Chlorite, Quartz, Selenite, Sericite
Geology
Host rockGreenstone,Schist · Amador Group
StructureFaults; 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 settingIsland Arc
AlterationZones Of Sericitization, Silicification And Pyritization As Belts And Lenses In Metavolcanic And Intrusive Rocks.
Economic & production
Development statusPast Producer
Production years1861-1867, 1883-1896, 1899-1919, 1926, 1928, 1937, 1943-1946, 1948-1953, 1955-1956, 1958-1959
First production1861
Last production1959
Discovery year1861
Identification
Deposit ID10033797
MRDS IDM020443
Alternate namesCampo Seco, Copper Hill, Hecla, Hinckley, Penn Chemical Works, Satellite
RegionNA
Data scoreB
Coordinates38.23019, -120.87491
References
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 - 31HEYL, 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 - 84CLARK, W. B. & LYDON, P. A., 1962 , (SEE REF.)