Mine detail: Freeport Tunnel

Previously called ''

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Location

Lat / long:

37.8714, -106.93451

Resource(M)

Primary:	Silver
Ore:	Acanthite
Gangue:	Barite, Hematite, Jarosite, Limonite
Discovery year:	1919

Production

Operation type:	Unknown
Production size:	None
Development status:	Prospect

Geology

Host rock:	Commodore Conglomerate Member Of Creede Formation;Monkemeyer Sandstone Member Of Creede Formation
Host type:	Sandstone,Conglomerate
Associated rock:	Fisher Creek Quartz Latite
Associated type:	Quartz Latite
Structure:	San Juan Volcanic Field; La Garita, Creede, And Bachelor Calderas, Amethyst Fault, Bachelor Mtn. Paleovalley (Controlled By Creede Graben)
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Silicification

References

MRDS	D007963
DEP	10012364
Reference	{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}
Reporter	Schwochow, Stephen D.