Mine detail: Alma

Previously called ''

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Location

Lat / long:

37.80379, -122.17215

Resource(B)

Primary:	Copper
Secondary:	Sulfur
Ore:	Bornite, Chalcocite, Chalcopyrite, Pyrite, Sphalerite
Orebody form:	LENTICULAR

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Past Producer

Geology

Host type:	Rhyolite
Structure:	Hayward Fault: Two Parallel Smaller Faults With Horizontal Displacement.

References

MRDS	M024332
DEP	10036253
Reference	{Deposit:: DAVIS, F.F., 1950: MINES AND MINERAL RESOURCES OF ALAMEDA COUNTY; CALIF. JOUR. MINES AND GEOLOGY, 001 46, NO.2 DIV OF MINES, P. 290.}{Deposit:: ERIC, J.H., 1948: COPPER IN CALIFORNIA BULL. 144: DIV. OF MINES, P-212}{Deposit:: LAIZURE, C.V., 1929: SAN FRANCISCO FIELD DIV.; 25TH REPT. STATE MIN.; CALIF DIV. OF MINES P. 440.}
Reporter	Fraticelli, L. A. (Albers, J.)