Mine detail: Peerless Mine

Previously called ''

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Location

Lat / long:

38.1114, -105.36307

Resource(M)

Primary:	Silver, Lead
Secondary:	Copper
Tertiary:	Iron
Ore:	Chalcopyrite, Galena, Pyrite, Silver, Stephanite, Tetrahedrite
Gangue:	Barite, Calcite, Clay
Discovery year:	1874

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Rosita Andesite;Game Ridge Trachyte
Host type:	Trachyte,Andesite,Volcanic Breccia (Agglomerate)
Structure:	Rosita Volcanic Center, Wet Mtns, Rosita Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Strongly Argillized

References

MRDS	D008066
DEP	10087601
Reference	{Deposit:: SIEMS, P.L., 1967, VOLCANIC AND ECONOMIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICTS, CUSTER COUNTY, COLORADO: COLORADO SCHOOL OF MINES, D. SC. THESIS, T1042, 222 P.}{Deposit:: SHARP, W.N., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081, 1:24,000.}
Reporter	Collins, Donna B.