Mine detail: Keepsake Prospect

Previously called 'Concord Hill'

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.11084, -105.3564
dep_id: 10012194
mrds_id: D007666
Commodity type: metallic
Major mineral: Silver
Operation type: Surface
Deposit type: Vein
Production size: No production occurred
Development status: Prospect
model: 82: Epithermal veins
alteration: Strong Argillization
ore_ctrl: Mineralized Fissures
Reporter: Collins, Donna B., Beach, Richard A.
hrock_type: Andesite
arock_unit: Rosita Andesite;Game Ridge Trachyte
arock_type: Andesite
Structure: Rosita Volcanic Center, Wet Mtns, Small Faults, Trachyte Dikes
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., 1968, VOLCANIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICT, CUSTER COUNTY, COLORADO: COLORADO SCHOOL MINES, D. SC. THESIS, T1042, 222 P.
  • Reserve-Resource:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
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