Commodities
PrimaryGold, Silver
SecondaryCopper, Lead
TertiaryZinc, Antimony, Tellurium
Commodity typeM
Deposit
Deposit typeVein
Model84: Alkaline Au-Te (Au-Ag-Te veins)
Deposit sizeS
Ore controlNorth-Trending Fissures In Precambrian Quartzite And Slate
Materials
Ore mineralsBornite, Calaverite, Chalcocite, Chalcopyrite, Galena, Marcasite, Petzite, Sphalerite, Sylvanite, Tetrahedrite
GangueBarite, Calcite, Hematite, Limonite, Quartz
Geology
Host rockSlate,Quartzite,Argillite · Uncompahgre Formation
Associated rockRhyodacite,Quartz Latite,Andesite · San Juan Formation;Early Intermediate Lavas And Breccias--Near-Source Facies
StructureSan Juan Uplift, San Juan Volcanic Field, San Juan Uplift, Unnamed Fault
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
Economic & production
Development statusPast Producer
First production1893
Discovery year1892
Identification
Deposit ID10101864
MRDS IDD010723
RegionNA
Data scoreB
Coordinates37.71612, -107.5348
References
STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 67-71, 89-90, 168-171.STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.PROSSER, W.C., 1911, THE BEAR CREEK SYLVANITE CAMP, COLORADO: ENG. MINING JOUR., V. 91, P. 712.