Mine detail: California Shaft

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.11001, -105.32001
dep_id: 10012288
mrds_id: D007839
Commodity type: metallic
Major mineral: Silver
Minor mineral: Lead
Operation type: Underground
Deposit type: Vein
Production size: Small ammount of material produced
Development status: Past Producer
ore: Galena
gangue: Barite
orebody_fm: vein
work_type: Underground
model: 82: Epithermal veins
alteration: Weak Argillization
ore_ctrl: California Fault; Contact Between Trachyte And Gneiss
Reporter: Collins, Donna B., Beach, Richard A.
hrock_type: Trachyte
arock_unit: Trachyte Of Game Ridge;Undivided Gneiss; Dark, Augite-Gneiss
arock_type: Trachyte
Structure: Rosita Volcanic Center, Wet Mtns, California Fault Separates Trachyte And Gneiss
tectonic: Central Cordillera (Southern Rocky Mtns)
yfp_ba: <
Year first produced: 1883
dy_ba: <
disc_yr: 1883
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.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.
  • Deposit:: Emmons, S.F., 1896, The mines of Custer County, Colorado: U.S. Geological Survey 17th Annual Report, Pt. 2, pp. 405-472.
  • Reserve-Resource:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
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