Mine detail: Boulder-Buffalo

Previously called 'Boulder Mine'

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.14057, -105.4389
dep_id: 10012287
mrds_id: D007838
Commodity type: metallic
Major mineral: Silver
Minor mineral: Iron, Manganese
Operation type: Surface
Production size: Small ammount of material produced
Development status: Past Producer
ore: Cerargyrite, Ocher, Psilomelane
gangue: Kaolin
work_type: Surface
model: 82: Epithermal veins
alteration: Weak Argillization
ore_ctrl: Spherulites To 6 Ft Diam Often Carry Ore In Cavities; Ore In Concentric Shells And Matrix
Reporter: Collins, Donna B.
hrock_type: Clay, Mud,Volcanic Rock (Aphanitic),Rhyolite
arock_unit: Silver Cliff Rhyolite Unit 2
arock_type: Clay, Mud,Rhyolite
Structure: Silver Cliff Volcanic Center, Wet Mtns, Wet Mtn Valley, Large Nw-Trending Fault
tectonic: Central Cordillera (Southern Rocky Mtns)
dy_ba: <
disc_yr: 1895
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 MAP I-1081.
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