Commodities
PrimarySilver, Lead, Zinc
SecondaryCopper, Gold
TertiaryBismuth
Commodity typeM
Deposit
Model72: Polymetallic replacement
Deposit sizeS
Orebody formTABULAR
Ore controlLimestone And Dissolution Gypsum Breccia Below Impermeable Shale Above Ne-Trending Vertical Fissures
Materials
Ore mineralsArgentite, Chalcopyrite, Pyrite, Sphalerite
GangueCalcite, Dolomite, Quartz, Siderite
Geology
Host rockShale,Limestone,Evaporite · Hermosa Formation
Associated rockLatite · Hornblende Latite Porphyry
StructureSan Juan Uplift, Paradox Basin, Rico Dome
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
Economic & production
Development statusPast Producer
Last production1939
Identification
Deposit ID10014138
MRDS IDD010785
Alternate namesAspen, MS 6512, Last Chance, MS 6512, Brittle Silver, MS 7458, Silver Glance, MS 6201, Silver Glance No. 2, MS 6201, Snow Flake, MS 6216, Vestal, MS 6252, Syndicate Tunnel, Patented Claims: Telegraph, MS 780, Syndicate, MS 2185a, Star, MS 6199, Selenide, MS 7458, Silver Glance No. 4, MS 7976, Stephanite, MS 7980
RegionNA
Data scoreA
Coordinates37.67918, -108.02926
References
MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723, P. 73-75.PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797.RANSOME, F.L., THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 335-340.CROSS, WHITMAN, AND RANSOME, F.L., 1905, DESCRIPTION OF THE RICO QUADRANGLE: USGS FOLIO 130.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.BLM MINERAL SURVEYS MS 780, 2185A, 6199, 6201, 6216, 6252, 7458, 7459, 7976, 7980BASTIN, E.S., 1922, SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO: USGS BULL. 735-D, P. 114-115.COLORADO DIV. MINES ANNUAL OPERATOR REPTS.