Commodities
PrimaryGold, Silver
SecondaryCopper, Lead
Commodity typeM
Deposit
Model82: Epithermal veins105: Epithermal vein, generic
Deposit sizeS
WorkingsUnderground
Ore controlAt Intersection Of Humboldt-Pocahontas Vein And Pioneer Vein
Materials
Ore mineralsChalcopyrite, Covellite, Galena, Malachite, Pyrite, Silver, Stephanite, Tetrahedrite
GangueBarite, Calcite, Clay
Geology
Host rockTrachyte,Volcanic Breccia (Agglomerate)
Associated rockAndesite · Rosita Andesite;Game Ridge Trachyte
StructureRosita Volcanic Center, Wet Mtns, Rosita Fault
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationStrong Argillization
Economic & production
Development statusPast Producer
Discovery year1874
Identification
Deposit ID10012433
MRDS IDD008060
Alternate namesBig Bonnie, Claims: Rocky Point, Delta Fox, Sunset
RegionNA
Data scoreB
Coordinates38.11029, -105.33974
References
CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.SHARP, W.N., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081, 1:24,000.Emmons, S.F., 1896, The mines of Custer County, Colorado: U.S. Geological Survey 17th Annual Report, Pt. 2, pp. 405-472.EMMONS, S.F., 1896Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.