Commodities
PrimaryCopper
SecondaryGold, Silver
TertiaryIron, Tungsten
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formPODS
Ore controlFaults, Joints
Materials
Ore mineralsChalcopyrite, Idocrase, Pyrite
GangueEpidote, Garnet, Magnetite, Quartz
Geology
Host rockHornfels
Associated rockDiorite
StructureFaults, Joints: Lilyama Area, Member Faults Trend Approximately East And Dip 42 - 65 South, With Apparent Displacements Of Less Than 5 Ft.
Economic & production
Development statusProducer
Production years1944 - 1946
Identification
Deposit ID10029708
MRDS IDM007430
Alternate namesLittle Emma, Volo
RegionNA
Data scoreB
Coordinates38.83517, -120.96825
References
CLARK, W. B. AND CARLSON, D. W., 1956 : MINES AND MINERAL RESOURCES, EL DORADO COUNTY, CA.: CALIF. JOUR. MINES AND GEOLOGY, VOL. 52 , NO. 4 : DIV. OF MINES, P. 397 - 398 , 482 .COX, M. W., ETAL, 1948 : GEOLOGY OF THE LILYAMA AND PIONEER MINES, EL DORADO COUNTY, CA.: COPPER IN CALIFORNIA BULL. 144 : DIV. OF MINES, P. 43 - 47 .IN 1957, PRODUCED ALL OF THE COUNTY'S RECOVERABLE COPPER AND APPRECIABLE AMOUNTS OF GOLD AND SILVER -- U.S. BUREAU OF MINES MIN. YEARBOOK 1957, V. 3, P. 216COX, M. W., ETAL, 1948 , P. 44