Mine detail: Midnight Mine

Previously called 'See Attachment'

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Location

Lat / long:

39.13221, -106.82256

Resource(M)

Primary:	Silver, Lead, Zinc
Tertiary:	Copper, Gold
Ore:	Chalcopyrite, Sphalerite
Gangue:	Barite, Chert, Quartz

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1951

Geology

Host rock:	Belden Formation
Host type:	Shale
Structure:	Sawatch Uplift, Central Colorado Trough, Piceance Basin, White River Uplift, Elk Uplift, Castle Creek Fault Zone, Annie Fault, Winnie Fault, Hope Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns); Colorado Platform

References

MRDS	D009652
DEP	10013387
Reference	{Deposit:: SPURR, J. E., 1898, GEOLOGY OF THE ASPEN DISTRICT, COLORADO: USGS MON. 31}{Deposit:: BRYANT, BRUCE, 1971, GEOLOGIC MAP OF THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP GQ-933}{Deposit:: BRYANT, BRUCE, 1972, MAP SHOWING MINES, PROSPECTS, AND AREAS OF SIGNIFICANT SILVER, LEAD, AND ZINC PRODUCTION IN THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP I-785-D}{Deposit:: KNOPF, ADOLPH, 1926, RECENT DEVELOPMENTS IN THE ASPEN DISTRICT, COLORADO: USGS BULL. 785, P. 1-28}{Deposit:: WILLOUGHBY, F. D., 1937, ROUGH SKETCH OF WORKINGS, MIDNIGHT MINING CO.: UNPUB. MAP}{Production:: COLO. DIV. MINES ANN. OPERATOR REPTS.}
Reporter	Schwochow, Stephen D.