Mine detail: Keystone Mine

Previously called ''

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Location

Lat / long:

39.9238, -116.55148

Resource(M)

Primary:	Silver, Lead, Zinc
Secondary:	Copper, Gold
Ore:	Chalcopyrite, Galena, Pyrite, Sphalerite
Gangue:	Garnet, Quartz
Orebody form:	IRREGULAR
Discovery year:	1870

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1925

Geology

Host rock:	Nevada Formation
Host type:	Limestone
Associated rock:	Keystone Granodiorite
Associated type:	Diorite
Structure:	Limestone Is Exposed In Window Of Roberts Mtn. Thrust
Alteration processes:	Skarn Formation

References

MRDS	M232311
DEP	10044735
Reference	{Deposit:: ROBERTS, R.J., ET AL (1967) GEOLOGY & MINERAL RESOURCES OF EUREKA CO, NEV, NEV BUREAU OF MINES BULL 64}{Deposit:: U.S. BUREAU OF MINES (MILLETT) MILS NO. 157, REFERENCE NO. 3201100010}{Production:: ROBERTS, R.J. ET AL., (1967).}
Reporter	Kirkham, Richard A.