Commodities
PrimarySilver, Copper
SecondaryLead, Gold, Zinc
TertiaryMolybdenum
Commodity typeM
Deposit
Model72: Polymetallic replacement
Deposit sizeS
Materials
Ore mineralsGalena, Molybdenite, Sphalerite
GangueKaolinite, Quartz
Geology
Host rockSandstone · Cutler Formation
Associated rockLatite,Basalt · Hornblende Latite Porphyry And Basalt;Calico Peak Porphyry
StructureSan Juan Uplift, Paradox Basin, Rico Dome, Calico Peak Stock, Calico Peak Anticline
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationShallow But Intense Near-Surface Oxidation Of Ores
Economic & production
Development statusPast Producer
First production1890
Last production1937
Discovery year1879
Identification
Deposit ID10014126
MRDS IDD010769
Alternate namesPatented Claims: Johnny Bull, MS 596, Legal Tender, MS 1838, Spanking Jack, MS 7047, Last Chance, MS 7047, Unpatented Claims: Gold Anchor, Gold Anchor Extension, Last Effort, Caledonia, Rainbow, Albion, Primrose, Cambia, Inspiration, Owl, Owl Nos.1-4
RegionNA
Data scoreB
Coordinates37.71529, -108.08815
References
MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723.PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797.RANSOME, F.L., 1901, THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 358.COLORADO DIV. MINES INF. REPTS.BLM MINERAL SURVEYS MS 596, 1838, 7047MARRS, G.O., 1925, REPORT ON THE GOLD ANCHOR GROUP OF MINES, PIONEER MINING DISTRICT, DOLORES COUNTY, COLORADO: UNPUB. ENG. REPT., 8 P.COLORADO DIV. MINES ANNUAL OPERATOR REPTS.