Mine detail: Sylvanite Mine

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Location: San Juan County, Colorado, United States, North America
Lat / long: 37.7114, -107.5148
dep_id: 10014097
mrds_id: D010726
Commodity type: metallic
Major mineral: Gold, Silver
Minor mineral: Copper, Lead
Trace mineral: Antimony, Zinc, Tellurium
Operation type: Unknown
Deposit type: Vein
Production size: Small ammount of material produced
Development status: Past Producer
ore: Bornite, Calaverite, Chalcocite, Galena, Marcasite, Petzite, Sphalerite, Sylvanite, Tetrahedrite
gangue: Barite, Calcite, Hematite, Limonite, Quartz
model: 84: Alkaline Au-Te (Au-Ag-Te veins)
ore_ctrl: North-Trending Fissures In Precambrian Quartzite And Slate
Reporter: Schwochow, Stephen D.
hrock_unit: Uncompahgre Formation
hrock_type: Slate,Phyllite
arock_unit: San Juan Formation;Early Intermediate Lavas And Breccias--Near-Source Facies
arock_type: Rhyodacite,Quartz Latite,Andesite
Structure: San Juan Uplift, San Juan Volcanic Field, San Juan Uplift, Unnamed Fault, Unnamed Anticline
tectonic: Central Cordillera (Southern Rocky Mtns)
Year first produced: 1892
disc_yr: 1893
References:
  • Deposit:: STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 67-71, 89-90.
  • Deposit:: STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.
  • Deposit:: CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.
  • Deposit:: COLORADO DIV. MINES INSP. REPTS., 1897, P. 284.
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