Mine detail: Exchequer Tunnel

Location:	Mineral County, Colorado, United States, North America
Lat / long:	37.86723, -106.92979
dep_id:	10012359
mrds_id:	D007951
Commodity type:	metallic
Major mineral:	Silver, Lead, Gold
Trace mineral:	Copper, Manganese
Operation type:	Unknown
Production size:	No production occurred
Development status:	Occurrence
ore:	Silver
gangue:	Amethyst, Barite, Limonite, Quartz
work_type:	Underground
alteration:	Copper Staining
Reporter:	Schwochow, Stephen D.
hrock_unit:	Campbell Mtn. Member Of Bachelor Mtn. Rhyolite
hrock_type:	Rhyolite
arock_unit:	Campbell Mtn. Member Of Bachelor Mtn. Rhyolite;Willow Creek Member Of Bachelor Mtn. Rhyolite
arock_type:	Rhyolite
Structure:	San Juan Volcanic Field; La Garita, Creede, And Bachelor Calderas, Creede Graben, Amethyst Fault Zone
tectonic:	Central Cordillera (Southern Rocky Mtns)
References:	Deposit:: EMMONS, W.H., AND LARSEN, E.S. 1923, GEOLOGY AND ORE DEPOSITS OF THE CREEDE DISTRICT, COLORADO: USGS BULL. 718, 198 P. Deposit:: STEVEN, T.A., AND RATTE, J.C., 1965, GEOLOGY AND STRUCTURAL CONTROL OF ORE DEPOSITION IN THE CREEDE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 487, 90 P. Deposit:: LINDEMANN, J.W., AND OTHERS, EDS., 1981, FIELD TRIP NOTES, CREEDE MINING DISTRICT, SAN JUAN VOLCANIC PROVINCE, COLORADO: DENVER REGIONAL EXPLORATION GEOLOGISTS SOC. GUIDEBOOK