Description
Enos F. Hotchkiss
Commodities
PrimarySilver, Gold, Copper, Lead
SecondaryZinc
TertiaryManganese, Strontium, Tellurium, Uranium, Antimony, Bismuth, Phosphorus-Phosphates
Commodity typeB
Deposit
Deposit typeVein
Deposit sizeS
Orebody formIRREGULAR
Ore controlEast-West-Trending Radial Fault Related To Lake City Caldera Formation
Materials
Ore mineralsAltaite, Bornite, Covellite, Galena, Hessite, Krennerite, Petzite, Pitchblende, Sphalerite, Sylvanite
GangueBarite, Hematite, Limonite, Quartz, Rhodochrosite
Geology
Host rockQuartz Latite · Local Volcaniclastic Sedimentary Rocks
Associated rockQuartz Latite · Quartz Latite Of Volcanics Of Uncompahgre Peak;Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics;Quartz Latite Of Red Mountain;Quartz Latite Of Grassy Mountain
StructureSan Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationSurface Oxidation Of Fe Sulfides To Hematite And Limonite; Kaolinitization Of Feldspar In Tuff; Hypogene Alteration Of Argentiferous Cu Sulfide To Pyrargyrite, Covellite, And Bornite
Economic & production
Development statusPast Producer
First production1875
Last production1963
Discovery year1874
Identification
Deposit ID10014678
MRDS IDD011559
Alternate namesHinsdale, MS 7668, Golden Fleece Extension, MS 8550, Hotchkiss Mine, Patented Claims: Golden Fleece, MS 1017, Gold Ram, MS 12450, Bank of Slumgullion, MS 9364, Kearsage, MS 12178, Colchis, MS 12234, Gold Pot, MS 12450, Greek, MS 12948, Necessity, MS 12948, Iron Clad, MS 13393, Concord, MS 13393, Newbern, MS 16720, Alpha, MS 8734, Omega, MS 8734, Enterprise, MS 8754, Yellow Jacket, MS 8978, Jason, MS 9118, Certified Check, MS 9364, Fleece Basin, MS 9364, Pallas, MS 7668, Denver, MS 9118
RegionNA
Data scoreB
Coordinates37.98057, -107.30063
References
IRVUNG, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478, P. 104-111.LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.LIPMAN, P.W., AND OTHERS, 1976, MULTIPLE AGES OF MID-TERTIARY MINERALIZATION AND ALTERATION IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 71, NO. 3, P. 571-588.SLACK, J.F., 1980, MULTISTAGE VEIN ORES OF THE LAKE CITY DISTRICT, WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY. V. 75, NO. 7, P. 963-991.MINING REPORTER, 1901, THE GOLDEN FLEECE MINE, LAKE CITY, HINSDALE COUNTY: MINING REPORTER, V. 44, P. 154-155.NELSON-MOORE, J.L., AND OTHERS, 1978, RADIOACTIVE MINERAL OCCURRENCENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 179.LARSEN, E.S., JR., AND SCHALLER, W.T., 1911, HINSDALITE, A NEW MINERAL: AM. JOUR. SCI., 4TH SER., V. 32, P. 251-255.SCHALLER, W.T., 1912, MINERALOGICAL NOTES, NO. 2: USGS BULL. 509, P. 66-69.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.BLM MINERAL SURVEYS.COLORADO DIV. MINES ANNUAL OPERATOR REPT.