Mine detail: Keystone

Previously called ''

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Location

Lat / long:

40.72096, -122.50499

Resource(M)

Primary:	Copper
Secondary:	Zinc, Silver, Gold
Ore:	Chalcopyrite
Orebody form:	TABULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1923 - 1925

Geology

Host rock:	Balaklala Rhyolite
Host type:	Rhyolite
Structure:	Steep Faults Have Been Found To Terminate Some Of The Massive Sulfide Bodies, Suggesting Possible Feeder Channels For Ore Solutions.
Tectonic:	Island Arc

References

MRDS	W025291
DEP	10077589
Reference	{Deposit:: KINKEL, A. R., HALL, W. E. AND ALBERS, J. P., 1956 , GEOLOGY AND BASE - METAL DEPOSITS OF WEST SHASTA COPPER - ZINC DISTRICT SHASTA COUNTY, CALIF., GEOLOGICAL SURVEY PROFESSIONAL PAPER 285 , PG. 129 - 131 .}{Deposit:: LYDON, P. A. AND *RIEN, J. C., 1974 , MINES AND MINERAL RESOURCES OF SHASTA COUNTY CALIF.; COUNTY REPORT 6, CALIF. DIV. MINES AND GEOLOGY, PG. 107 .}{Production:: KINKEL ET AL., 1956 , PG. 129 (SEE REF.)}
Reporter	Fraticelli, L. A. (Albers, J.)