Mine detail: Piedra Peak-Red Mountain Alunite Deposits

Previously called 'Colorado Tunnel'

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Location

Lat / long:

37.57973, -106.99173

Resource(M)

Primary:	Aluminum
Secondary:	Copper, Lead
Tertiary:	Silver, Zinc, Gold
Ore:	Alunite
Gangue:	Chlorite, Kaolinite, Pyrite, Quartz, Sericite
Orebody form:	POD

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Fisher Quartz Latite;Volcanic Of Table Mountain
Host type:	Quartz Latite
Associated rock:	Fisher Quartz Latite;Volcanics Of Table Mountain
Associated type:	Quartz Latite
Structure:	San Juan Volcanic Field, La Garita Caldera, Creede Caldera, Mount Hope Caldera, Small Unnamed Intrusive Centers
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Silicification Argillization, Propylitization, Alunitization

References

MRDS	D010670
DEP	10014054
Reference	{Deposit:: STEVEN, T.A., AND LIPMAN, P.W., 1973, GEOLOGIC MAP OF THE SPAR CITY QUADRANGLE, MINERAL COUNTY, COLORADO: USGS MAP GQ-1052.}{Deposit:: STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F P. 80-81, 174-177}{Deposit:: HALL, R.B., 1980, ALUNITE--A POTENTIALLY ECONOMIC SOURCE OF ALUMINUM AND POTASH?, IN SCHWOCHOW, S.D., ED., PROCEEDINGS OF THE FIFTEENTH FORUM ON GEOLOGY OF INDUSTRIAL MINERALS: CGS RESOURCE SER. 8, P. 77-88}
Reporter	Schwochow, Stephen D.