Mine detail: French Tunnel

Previously called ''

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Location

Lat / long:

37.42696, -106.60171

Resource(M)

Primary:	Gold, Silver
Secondary:	Copper
Discovery year:	1872

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1880

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:	Qaurtz-Alunite Solfataric Alteration

References

MRDS	D010649
DEP	10014035
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 THESUMMITVILLE DISTRICT. SAN JUAN MOUNTAINS. COLORADO: USGS PROF. PAPER 343}{Deposit:: LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.}{Deposit:: CARPER, A.F., 1914, GEOLOGY AND ORE DEPOSITS OF SOUTH MOUNTAIN, RIO GRANDE COUNTY, COLORADO: COLORADO SCHOOL OF MINES THESIS T-464.}
Reporter	Schwochow, Stephen D.