Mine detail: Ophir Mine

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.12668, -105.34529
dep_id: 10012203
mrds_id: D007678
Commodity type: metallic
Major mineral: Silver
Operation type: Underground
Deposit type: Vein
Production size: Small ammount of material produced
Development status: Past Producer
ore: Galena, Sphalerite
gangue: Actinolite, Pyrite
model: 82: Epithermal veins
alteration: Strong Argillization
ore_ctrl: Breccia Pipe; Ore In Concentric Shells Around Breccia Boulders, Trachyte Dikes
Reporter: Collins, Donna B.
hrock_unit: Rosita Andesite
hrock_type: Andesite,Volcanic Breccia (Agglomerate)
Structure: Rosita Volcanic Center, Wet Mtns, In Breccia Pipe, Small Faults
tectonic: Central Cordillera (Southern Rocky Mtns)
disc_yr: 1882
References:
  • 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.
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