Commodities
PrimarySilver
Commodity typeM
Deposit
Deposit typeReplacement
Model72: Polymetallic replacement
Deposit sizeS
Ore controlChemical Favorability Of Limestone For Replacement
Materials
Ore mineralsArgentite, Bromyrite, Silver
GangueAllophane, Quartz
Geology
Host rockLimestone · Hermosa Formation
Associated rockLatite · Hornblende Latite Porphyry
StructureSan Juan Uplift, Paradox Basin, Rico Dome
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationOxidation Of Ag Sulfide
Economic & production
Development statusPast Producer
Last production1900
Identification
Deposit ID10014136
MRDS IDD010782
Alternate namesPatented Claims: Puzzle, MS 374, John B., MS 679, Stephen B., MS 680, Minnie May, MS 1465, Unpatented Claims: May Lode, Gulch Lode, Black Diamond Nos. 1-2
RegionNA
Data scoreB
Coordinates37.71445, -108.04898
References
RANSOME, F.L., 1901, THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN, REPT., PT. 2, P. 352-354.PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723.BLM MINERAL SURVEYS MS 374, 679, 680, 1465