Domingo District

Gunnison, Saguache County, Colorado, United States

GoldSilverSulfurCopperTelluriumLeadZincSeleniumBismuthThoriumVanadium

⌖ Show on map USGS source ↗

Commodities

PrimaryGold, Silver

SecondarySulfur, Copper

TertiaryTellurium, Lead, Zinc, Selenium, Bismuth, Thorium, Vanadium

Commodity typeB

Deposit

Deposit sizeS

Ore controlMassive Sulfide Deposition Controlled By Original Depositional Environment In Submarine Volcanic Sequence. Precious Metals And Tellurides Localized In Silica Vein System Near Hanging Wall Of Lens (Stratigraphic/Structural Discontinuity). Native S/Se Localized In Oxidized Portion Of Sulfide Lens Above Present Water Table. Th Occurrence Apparently Controlled By Mineralogy In Discordant Trachyte Dikes.

Materials

Ore mineralsChalcopyrite, Copper, Galena, Gold, Petzite, Rickardite, Sphalerite, Sulfur, Sylvanite, Thorite

GangueChlorite, Coloradoite, Jasper, Limonite, Magnetite, Pyrrhotite, Quartz, Sericite, Tetradymite

Geology

Host rockTrachyte,Granite · Dubois Greenstone--Felsite And Felsite Porphyry;Dubois Greenstone--Quartzite

Associated rockIntrusive Carbonatite,Trachyte,Andesite,Granite · Granite Of Tolvar Jpeak;Trachyte And Trachyte Porphyry Dikes;Carbonatite;Quartz Vein

StructureGunnison Uplift, San Juan Volcanic Field, Gunnison Gold Belt, Iron Hill Alkalic Complex, Tolvar Peak Stock

Tectonic settingCentral Cordillera (Southern Rocky Mtns)

AlterationOxidation Of Pyrite To Fe Oxides And Native S; Sericitization And Chloritization Of Schist Near Mineralized Zone; Supergene Alteration Of Cu Sulfide To Covellite; Supergene Alteration Of Tellurides To Native Te And Cu Tellurides (Rickardite, Weissite, Vulcanite)

Economic & production

Development statusProducer

First production1898

Last production1983

Discovery year1894

Identification

Deposit ID10014386

MRDS IDD011132

Alternate namesVulcan District, Patented Claims: Vulcan, MS 10909, War Eagle, MS 10910, Humming Bird, MS 10910, Rose Bud, MS 10910, Iron Clad, MS 10910, Della S., MS 11243, Morning Star, MS 11243, St.Patrick, MS 12175, Mammoth Chimney, MS 12454, Good Hope, MS 12456, Lincoln, MS 13156, Golden Slipper, MS 13179, Humboldt, MS 16392, Branch, MS 17215, Eclipse, MS 17390, Yellow Rose, MS 17390, Laura Belle, MS 19038, Mill Site Lode, MS 19920

RegionNA

Data scoreB

Coordinates38.34528, -107.00173

References

DROBECK, P.A., 1981, PROTEROZOIC SYNGENETIC MASSIVE SULFIDE DEPOSITS IN THE GUNNISON GOLD BELT, COLORADO, IN EPIS, R.C., AND CALLENDER, J.F., EDS., WESTERN SLOPE COLORADO: NEW MEXICO GEOL. SOC. 32D FIELD CONF. GUIDEBOOK, P. 279-286.HARTLEY, P.D., 1976, THE GEOLOGY AND MINERALIZATION OF A PRECAMBRIAN MASSIVE SULFIDE DEPOSIT AT VULCAN, GUNNISON COUNTY, COLORADO: STANFORD UNIV. M.SC. THESIS.HARTLEY, P.D., 1983, GEOLOGY AND MINERALIZATION OF THE VULCAN-GOOD HOPE MASSIVE SULFIDE DEPOSIT, GUNNISON COUNTY, COLORADO, IN HANDFIELD, R.C., ED., GUNNISON GOLD BELT AND POWDERHORN CARBONATITE FIELD TRIP GUIDEBOOK: DREGS, P. 19-27.HEDLUND, D.C., AND OLSON, J.C., 1975, GEOLOGIC MAP OF THE POWDERHORN QUADRANGLE, GUNNISON AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1178.LAKES, ARTHUR, 1896, SKETCH OF A PORTION OF THE GUNNISON GOLD BELT INCLUDING THE VULCAN AND MAMMOTH CHIMNEY MINES: AIME TRANS., V. 26, P. 440-448.OLSON, J.C., AND OTHERS, 1975, GEOLOGIC MAP OF THE SPRING HILL CREEK QUADRANGLE, SAGUACHE COUNTY, COLORADO: USGS MAP MF-713.SHERIDAN, D.M., AND OTHERS, 1981, PRECAMBRIAN SULFIDE DEPOSITS IN THE GUNNISON REGION, COLORADO, IN EPIS, R.C., AND CALLENDER, J.F., EDS., WESTERN SLOPE COLORADO: NEW MEXICO GEOL. SOC. 32D FIELD CONF. GUIDEBOOK, P. 273-277.CAMERON, E.N., AND THREADGOLD, I.M., 1961, VULCANITE, A NEW COPPER TELLURIDE FROM COLORADO: AM. MINERALOGIST, V. 46, P. 258-268.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.BLM MINERAL SURVEYS MS 10909, 10910, 11243, 12175, 12454, 12456, 13156, 13179, 16392, 17390, 19038, 199920