Mine detail: Geyser Mine

Previously called 'Fleetwood TunnelSecurity-Geyser'

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.1389, -105.4414
dep_id: 10012344
mrds_id: D007922
Commodity type: metallic
Major mineral: Silver, Lead
Minor mineral: Zinc, Copper, Gold
Operation type: Underground
Production size: Medium ammount of material produced
Development status: Past Producer
ore: Argentite, Chalcopyrite, Galena, Gold, Hessite, Polybasite, Pyrargyrite, Sphalerite, Tetrahedrite
gangue: Barite, Calcite, Chalcedony, Garnet, Quartz, Topaz
orebody_fm: VEINS
work_type: Unknown
model: 82: Epithermal veins
alteration: Weak Argillization
ore_ctrl: Mineralized Fissures, Jointing Striking Nw
Reporter: Collins, Donna B.
hrock_unit: Undivided Gneiss, San Isabel Granite Of Boyer Reached At 1850 Ft, Still Mineralized
hrock_type: Gneiss,Obsidian,Tuff,Volcanic Breccia (Agglomerate),Rhyolite
arock_unit: Silver Cliff Rhyolite Unit 2
arock_type: Gneiss,Obsidian,Tuff,Volcanic Breccia (Agglomerate),Rhyolite
Structure: Silver Cliff Volcanic Center, Wet Mtns, Wet Mtn Valley, Silver Cliff Graben, Fault; Geyser Vent, Breccia Pipes
tectonic: Central Cordillera (Southern Rocky Mtns)
Year first produced: 1880
yr_lst_prd: 1911
disc_yr: 1878
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:: FIELDMAN, D.W. AND CROWLEY, F.P., 1980, SILVER DEPOSITS IN THE SOUTHERN PORTION OF THE SILVER CLIFF CALDERA, IN SILVER CLIFF VOLCANIC CENTER AND TALLAHASSEE CREEK URANIUM DEPOSITS: DENVER REGIONAL EXPLORATION GEOLOGISTS GUIDEBOOK, P. 1-14.
  • Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.
  • Production:: COLORADO DIVISION MINES INSPECTOR REPORTS, ANNUAL REPORTS
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