The Empire is a copper mine located in Calaveras county, California.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Empire MRDS details
Site Name
Primary: Empire
Commodity
Primary: Copper
Location
State: California
County: Calaveras
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Not available
Orebody
Form: LENTICULAR
Structure
Type: L
Description: "Calaveras Fault"; High Angle East-Dipping Fault, Traced Along Strike Over 2,000 Ft., Zone Of Chloritization Has Followed The Fault. The Fault Is Located On Eastern Boundary Of A Elongate Serpentine Body, 150 Ft. Sw. Of Empire Shaft Collar.
Alterations
Alteration Type: L
Alteration Text: Chloritization
Rocks
Not available
Analytical Data
Analytical Data: ASSAYED LESS THAN 1 % CU.
Materials
Ore: Chalcopyrite
Ore: Pyrite
Ore: Malachite
Ore: Cuprite
Gangue: Calcite
Gangue: Feldspar
Gangue: Quartz
Comments
Comment (Workings): ONE SHAFT, ONE ADIT 420 FT. IN LENGTH. OTHER SHAFTS PITS AND ADITS NOT ACCESSIBLE.
Comment (Production): TONNAGE AND AMOUNT PRODUCED NOT REPORTED.
Comment (Deposit): NO LARGE QUANTITY OF COPPER ORE OBSERVED IN WALLS OF ADIT.
Comment (Geology): GEOL.DESC: METAVOLCANICS INCLUDE; CHIEFLY SCHISTOSE PYROCLASTICS AND SPOTTED GREEN SCHISTS - FOLIATION IN MOST PLACES DIP STEEPLY EASTWARD. INTRUDED INTO THEM ARE DIKES AND IRREGULAR BODIES OF GABBRO, HORNBLENDITE, HORNBLENDE DIORITE AND GRANODIORITE. STRONGEST MINERALIZATION IS ADJACENT TO FAULTS OR SHEAR ZONES IN CHLORITIZED SCHIST WEST OF GRANODIORITE BODY.
References
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. 25
Reference (Deposit): HEYL, G.R., 1948 , ORE DEPOSITS OF COPPEROPOLIS, CALAVERAS COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 108 - 109 .
Reference (Production): HEYL, G.R., 1948 , P. 96 (SEE REF)
California Gold
"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.
