Mine detail: Leona Heights

Previously called 'Leona'

<< Back to the map

Location

Lat / long:

37.79129, -122.17521

Resource(M)

Primary:	Copper
Secondary:	Gold
Tertiary:	Zinc
Ore:	Bornite, Chalcanthite, Chalcocite, Chalcopyrite, Copper, Epsomite, Hematite, Limonite, Pyrite, Sphalerite
Orebody form:	LENTICULAR
Discovery year:	1891

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1925 - 1929

Geology

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

References

MRDS	M004762
DEP	10102589
Reference	{Deposit:: CLARK, C.W., 1917 : GEOLOGY AND ORE DEPOSITS OF LEONA RHYOLITE: UNIV. CALIF. PUB., BULL. OF DEPT. GEOLOGY, VOL. 10 , NO. 20 , PP 361 - 382}{Deposit:: DAVIS, F.F., 1950 ; MINES AND MINERAL RESOURCES ALAMEDA COUNTY; CALIF. JOUR. MINES AND GEOLOGY, VOL. 46 , NO. 2 ; DIV. OF MINES, P. 305 - 307}{Deposit:: LAIZURE, C.V., 1929 ; SAN FRANCISCO FIELD DIV.; 25TH REPT. STATE MIN.; CALIF. DIV. OF MINES, P. 440 - 441}{Production:: ERIC, J.H., 1948}
Reporter	Gere, W., Fraticelli, L. A. (Albers, J.)