Mine detail: Free Coinage Mine

Previously called ''

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Location

Lat / long:

37.76334, -108.10343

Resource(M)

Primary:	Silver, Gold
Secondary:	Lead, Copper
Tertiary:	Zinc
Ore:	Argentite, Chalcopyrite, Galena, Polybasite, Pyrargyrite, Sphalerite
Gangue:	Quartz

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Cutler Formation;Dolores Formation
Host type:	Shale,Siltstone,Sandstone
Associated rock:	Microgabbro
Associated type:	Gabbro
Structure:	San Juan Uplift, Paradox Basin, Rico Dome, Dunton Syncline, Emma Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D010906
DEP	10014229
Reference	{Deposit:: BUSH, A.L., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE DOLORES PEAK QUADRANGLE, DOLORES AND SAN MIGUEL COUNTIES, COLORADO: USGS MAP GQ-536.}{Deposit:: BASTIN, E.S., 1922, SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO: USGS BULL. 735-D, P. 116-129.}{Deposit:: COLORADO DIV. MINES INF. REPTS.}
Reporter	Schwochow, Stephen D.