Mine detail: P & O Mine

Previously called ''

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Location

Lat / long:

38.1289, -105.33363

Resource(M)

Primary:	Silver, Gold
Secondary:	Lead, Zinc, Copper
Ore:	Chalcopyrite, Galena, Gold, Jamesonite, Smithsonite, Sphalerite, Tetrahedrite
Gangue:	Calcite, Dolomite, Pyrite, Quartz, Stibnite
Orebody form:	PIPE-LIKE STRUCTURE
Discovery year:	1877

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1878

Geology

Host rock:	Granite And Gneiss Fragments Found At Depth
Host type:	Tuff,Volcanic Breccia (Agglomerate),Andesite
Associated rock:	Rosita Andesite
Associated type:	Andesite
Structure:	Rosita Volcanic Center, Wet Mtns, Breccia Pipe, Faults, Fractures, Mineralized Fissures
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Strong Argillization; Quartz Zone

References

MRDS	D008054
DEP	10012430
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: SHARP, W.N., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081, 1:24,000. .}{Deposit:: SIEMS, P.L., 1967, VOLCANIC AND ECONOMIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICTS, CUSTER COUNTY, COLORADO: COLORADO SCHOOL MINES, D. SC. THESIS, T 1042, 222 P.}
Reporter	Collins, Donna B.