Mine detail: Narrow Gauge Mine

Previously called 'Narrow Gage shaft'

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Location

Lat / long:

37.42419, -106.5956

Resource(M)

Primary:	Silver, Gold
Secondary:	Copper

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Quartz Latite Of South Mountain;Summitville Andesite
Host type:	Quartz Latite
Associated rock:	Quartz Latite Of South Mountain;Summitville Andesite
Associated type:	Quartz Latite,Andesite
Structure:	San Juan Volcanic Field, Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Quartz-Alunite Solfataric Alteration

References

MRDS	D010658
MAS	81050023
DEP	10014042
Reference	{Deposit:: PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.}{Deposit:: STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343, pl. 3.}{Deposit:: LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.}
Reporter	Schwochow, Stephen D., Intermountain Field Operations Center (IFOC), Wilson, Anna B.