Commodities
PrimarySilver, Gold, Copper
SecondaryLead
TertiaryZinc
Commodity typeM
Deposit
Model154: Epithermal quartz-alunite Au
Deposit sizeS
WorkingsSurface/Underground
Ore controlQuartz-Alunite Solfataric Replacement Bodies Following Nw-Trending Fractures Near Sw Margin Of South Mountain Feeder Conduit
Materials
Ore mineralsCovellite, Galena, Gold, Sphalerite
Geology
Host rockQuartz Latite · Quartz Latite Of South Mountain;Summitville Andesite
Associated rockQuartz Latite,Andesite · Quartz Latite Of South Mountain;Summitville Andesite
StructureSan Juan Volcanic Field, Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationQuartz-Alunite Solfataric Alteration
Economic & production
Development statusProducer
Last production1971
Identification
Deposit ID10014044
MRDS IDD010660
Alternate namesGolconda Tunnel, Reynolds Tunnel
RegionNA
Data scoreA
Coordinates37.42585, -106.59282
References
PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.MINING ENGINEERING, JULY 1990.ENGINEERING & MINING JOURNAL, JUNE 1988, PP. 46.STOFFREGEN, R.E., 1987, GENESIS OF ACID-SULPHATE ALTERATION AND AU-CU-AG MINERALIZATION AT SUMMITVILLE, COLORADO: ECONOMIC GEOLOGY, V. 82, PP. 1575, 1591.COLORADO DIV. MINES ANN. OPERATOR REPTS. ; MINING ENGINEERING, JULY 1990.; ENGINEERING & MINING JOURNAL, JUNE 1988. DENVER POST, MAY 14, 1990.