Mine detail: Ophir Mine

Previously called ''

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Location

Lat / long: 38.12668, -105.34529

Resource(M)

Primary: Silver
Ore: Galena, Sphalerite
Gangue: Actinolite, Pyrite
Discovery year: 1882

Production

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

Geology

Host rock:Rosita Andesite
Host type:Andesite,Volcanic Breccia (Agglomerate)
Structure:Rosita Volcanic Center, Wet Mtns, In Breccia Pipe, Small Faults
Tectonic:Central Cordillera (Southern Rocky Mtns)
Alteration processes:Strong Argillization

References

MRDSD007678
DEP10012203
Reference{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403}{Deposit:: EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO USGS 17TH ANN. REPORT, PT 2, P. 405-472.}{Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.}{Deposit:: SIEMS, P.L., 1967, VOLCANIC AND ECONOMIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICTS, CUSTER COUNTY, COLORADO: COLORADO SCHOOL MINES, D. SC. THESIS, T1042, 222 P.}
ReporterCollins, Donna B.