Mine detail: Keystone Mines

Previously called 'NBMG Sample Sites 2654, 2655, 2656Old CentralNevada Keystone Mine'

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Location

Lat / long:

40.84156, -118.1182

Resource(M)

Primary:	Silver, Lead, Zinc
Secondary:	Gold, Copper
Tertiary:	Tungsten
Ore:	Pyrite, Scheelite, Sphalerite, Stibnite
Discovery year:	1872

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer

Geology

Host type:	Diorite,Hornfels
Associated type:	Diorite
Structure:	Gently Dipping Shear Zones
Alteration processes:	Sericitization, Silicification, Kaolinization, Pyritization

References

MRDS	M060311
DEP	10042501
Reference	{Deposit:: LEMMON, D.M., 1977, IN GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULL. 89}{Deposit:: KLEPPER, M.R., 1943, UNPUBLISHED REPORT}{Deposit:: TINGLEY, J. V., 1985, NBMG FIELD EXAMINATION REPORT,4/19/1985.}{Deposit:: STAGER, H. K., IN PREPARATION, TUNGSTEN DEPOSITS OF NEVADA, NBMG BULL.}
Reporter	Johnson, Maureen G., La Pointe, D.D. (Tingley, J.V.), Royse, Sue E., Li, Zhiping (Peters, S.)