Commodities
PrimarySilver
SecondaryLead, Copper
Commodity typeM
Deposit
Model82: Epithermal veins
Deposit sizeS
WorkingsUnknown
Ore controlTwenty-Six Fault, Breccia Boulders; Ore Shows "Comb" Structure, Replacement
Materials
Ore mineralsArgentite, Chalcopyrite, Galena
GangueBarite, Calcite, Pyrite
Geology
Host rockAndesite,Trachyte · "Rosita Andesite;Game Ridge Trachyte", "Granite Boulders Included In Breccia"
StructureRosita Volcanic Center, Wet Mtns, Twenty-Six Fault, Striking East-West
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationWeak Argillization
Economic & production
Development statusPast Producer
Discovery year1895
Identification
Deposit ID10012346
MRDS IDD007925
Alternate namesTwenty-six-Polonia vein
RegionNA
Data scoreB
Coordinates38.11251, -105.33335
References
CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403EMMONS, 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AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.