Mine detail: P & O Mine

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.1289, -105.33363
dep_id: 10012430
mrds_id: D008054
Commodity type: metallic
Major mineral: Silver, Gold
Minor mineral: Lead, Zinc, Copper
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Chalcopyrite, Galena, Gold, Jamesonite, Smithsonite, Sphalerite, Tetrahedrite
gangue: Calcite, Dolomite, Pyrite, Quartz, Stibnite
orebody_fm: PIPE-LIKE STRUCTURE
model: 82: Epithermal veins
alteration: Strong Argillization; Quartz Zone
conc_proc: Supergene Enrichment Near Surface
ore_ctrl: At Junction Of Two Fracture Planes
Reporter: Collins, Donna B.
hrock_unit: Granite And Gneiss Fragments Found At Depth
hrock_type: Tuff,Volcanic Breccia (Agglomerate),Andesite
arock_unit: Rosita Andesite
arock_type: Andesite
Structure: Rosita Volcanic Center, Wet Mtns, Breccia Pipe, Faults, Fractures, Mineralized Fissures
tectonic: Central Cordillera (Southern Rocky Mtns)
Year first produced: 1878
disc_yr: 1877
References:
  • Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.
  • 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. .
  • 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, T 1042, 222 P.
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