Commodities
PrimaryGold, Silver
SecondaryLead, Copper
TertiaryZinc, Tellurium, Antimony
Commodity typeM
Deposit
Deposit typeVein
Model84: Alkaline Au-Te (Au-Ag-Te veins)
Deposit sizeS
WorkingsSurface/Underground
Ore controlNorth-Trending Fissures In Precambrian Quartzite And Slate
Materials
Ore mineralsBornite, Calaverite, Chalcocite, Chalcopyrite, Galena, Marcasite, Petzite, Sphalerite, Sylvanite, Tetrahedrite
GangueBarite, Calcite, Chlorite, Hematite, Kaolinite, Limonite, Magnetite, Quartz, Siderite, Vermiculite
Geology
Host rockSlate,Quartzite,Schist,Gneiss,Argillite · Uncompahgre Formation;Irving 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 Faults, San Juan Caldera, Unnamed Folds
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationOxidation Of Cu And Fe Sulfides
Economic & production
Development statusPast Producer
First production1892
Last production1961
Identification
Deposit ID10014090
MRDS IDD010716
Alternate namesBear Creek District, Patented Claims: Good Hope, MS 7764, Wonder, MS 7764, Ferris Heretofore Ptarmigan, MS 8705, Little Giant, MS 9145, Bonita, MS 11327, Repeal, MS 11691a, Gold Bug, MS 11691a, Gold Nugget, MS 11691a, Gold Bug Mill Site, MS 11691b, Montezuma, MS 12152, Great Western, MS 12152, Anaconda, MS 12152, Robertson, MS 12224, Scott, MS 12224, I.X.L., MS 12309, J.I.C., MS 12309, Kankakee, MS 14205, Eclipse, MS 15263, El Dorado, MS 16686
RegionNA
Data scoreB
Coordinates37.72279, -107.50313
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.PROSSER, W.C., 1911, THE BEAR CREEK SYLVANITE CAMP, COLORADO: ENG. MINING JOUR., V. 91. 712.STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGE MAP I-764.BARKER, FRED, 1969, PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUTHWESTERN COLORADO: USGS PROF. PAPER 644-A.CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.BLM MINERAL SURVEYS 7764, 8705, 9145, 11327, 11691A&B, 12152, 12224, 12309, 14205, 15263, 16686COLORADO DIV. MINES INF. REPTS., ANNUAL OPERATOR REPTS., INSPECTOR REPTS., MINE MANAGERS REPTS.STEVEN, T.A., AND OTHERS, 1969, P. 89.