Mine detail: Pioneer - Lilyama

Previously called 'Little EmmaVolo'

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Location

Lat / long:

38.83517, -120.96825

Resource(M)

Primary:	Copper
Secondary:	Gold, Silver
Tertiary:	Iron, Tungsten
Ore:	Chalcopyrite, Idocrase, Pyrite
Gangue:	Epidote, Garnet, Magnetite, Quartz
Orebody form:	PODS

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
Production years:	1944 - 1946

Geology

Host type:	Hornfels
Associated type:	Diorite
Structure:	Faults, Joints: Lilyama Area, Member Faults Trend Approximately East And Dip 42 - 65 South, With Apparent Displacements Of Less Than 5 Ft.

References

MRDS	M007430
DEP	10029708
Reference	{Deposit:: 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 .}{Deposit:: 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 .}{Deposit:: IN 1957, PRODUCED ALL OF THE COUNT * RECOVERABLE COPPER AND APPRECIABLE AMOUNTS OF GOLD AND SILVER -- U.S. BUREAU OF MINES MIN. YEARBOOK 1957, V. 3, P. 216}{Production:: COX, M. W., ETAL, 1948 , P. 44}
Reporter	Gere, W., Fraticelli, L. A. (Albers, J.)