Commodities
PrimarySilver
SecondaryLead, Copper, Zinc
TertiaryIron
Commodity typeM
Deposit
Model82: Epithermal veins
Deposit sizeS
WorkingsUnderground
Ore controlMineralized Pebble Dike
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Sphalerite, Argentite, Chalcocite, Stephanite
GangueBarite, Calcite
Geology
Host rockTrachyte · Game Ridge Trachyte;Rosita Andesite On Other Side Of Fault
StructureRosita Volcanic Center, Wet Mtns, On Twenty-Six Fault Which Strikes East-West
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationWeakly Argillized
Economic & production
Development statusPast Producer
Discovery year1895
Identification
Deposit ID10012302
MRDS IDD007856
Alternate namesTwenty-six-Polonia vein, Brittle Silver
RegionNA
Data scoreB
Coordinates38.1114, -105.3289
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AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.