Commodities
PrimarySilver
SecondaryZinc, Lead
Commodity typeM
Deposit
Deposit typeVein
Model82: Epithermal veins
Deposit sizeS
Ore controlMineralized Fissures Near Bassick Breccia Pipes
Materials
Ore mineralsGalena, Sphalerite
GanguePyrite, Calcite, Quartz
Geology
Host rockAndesite
Associated rockAndesite · Rosita Andesite
StructureRosita Volcanic Center, Wet Mtns, Numerous Small Faults; Near Volcanic Vent; Near Bassick Breccia Pipes
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationStrong Argillization, Very Bleached
Economic & production
Development statusPast Producer
Discovery year1882
Identification
Deposit ID10101709
MRDS IDD007674
Alternate namesMidnight, Jackpot No. 1
RegionNA
Data scoreB
Coordinates38.12918, -105.32418
References
CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN REPORT, PT 2, P. 263-403.EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.