Mine detail: Polonia Shaft

Previously called 'Twenty-six-Polonia veinBrittle Silver'

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Location

Lat / long:

38.1114, -105.3289

Resource(M)

Primary:	Silver
Secondary:	Lead, Copper, Zinc
Tertiary:	Iron
Ore:	Chalcopyrite, Galena, Pyrite, Sphalerite, Argentite, Chalcocite, Stephanite
Gangue:	Barite, Calcite
Discovery year:	1895

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Game Ridge Trachyte;Rosita Andesite On Other Side Of Fault
Host type:	Trachyte
Structure:	Rosita Volcanic Center, Wet Mtns, On Twenty-Six Fault Which Strikes East-West
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Weakly Argillized

References

MRDS	D007856
DEP	10012302
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.}{Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.}{Reserve-Resource:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}
Reporter	Collins, Donna B., Beach, RIchard A.