Mine detail: Silver Cliff District

Previously called 'Hardscrabble district'

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Location

Lat / long:

38.15334, -105.44946

Resource(M)

Primary:	Silver, Gold
Secondary:	Lead, Copper, Zinc
Other material:	Gold, Pyrite, Tetrahedrite, Galena, Cryptomalene, Chalcopyrite, Sphalerite, Silver, Stibnite, Stephanite

Production

Operation type:	Unknown
Development status:	Past Producer

Geology

Associated type:	Rhyolite,Granodiorite
Structure:	Silver Cliff volcanic complex and graben
Alteration processes:	argillic; pyritic

References

DEP	10311014
Reference	{Deposit:: Cappa, J.A., 1998, Alkalic igneous rocks of Colorado and their associated ore deposits: Colorado Geological Survey Resource Series 35, 138 p.}{Deposit:: Siems, P.L., 1967, Volcanic and economic geology of the Rosita Hills and Silver cliff districts, Custer County, Colorado: Golden, Colorado School of Mines, D. Sc. dissertation, 222 p.}{Geology:: Sharp, W.N., 1978, Geologic map of the Silver Cliff and Rosita volcanic centers, Custer County, Colorado: U.S. Geological Survey Miscellaneous Investigation Series Map I-1081, scale 1:24,000.}
Reporter	Keller, John W.