The Polonia Shaft is a silver mine located in Custer county, Colorado at an elevation of 9,199 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 9,199 Feet (2,804 Meters)
Commodity: Silver
Lat, Long: 38.11139, -105.32833
Map: View on Google Maps
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Polonia Shaft MRDS details
Site Name
Primary: Polonia Shaft
Secondary: Twenty-six-Polonia vein
Secondary: Brittle Silver
Commodity
Primary: Silver
Secondary: Lead
Secondary: Copper
Secondary: Zinc
Tertiary: Iron
Location
State: Colorado
County: Custer
District: Rosita Hills District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1895
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Epithermal veins
Orebody
Not available
Structure
Type: R
Description: Rosita Volcanic Center, Wet Mtns
Type: L
Description: On Twenty-Six Fault Which Strikes East-West
Alterations
Alteration Type: L
Alteration: carbonate, argillic
Alteration Text: Weakly Argillized
Rocks
Name: Trachyte
Role: Host
Age Type: Host Rock
Age Young: Oligocene
Analytical Data
Not available
Materials
Ore: Argentite
Ore: Stephanite
Ore: Chalcocite
Ore: Galena
Ore: Chalcopyrite
Ore: Pyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Barite
Comments
Comment (Location): SOUTH SIDE OF DUTCH FLAT, 1 MILE NNE OF ROSITA, IN THE NW/4 SEC 28, T 22 S, R 71 W. INFO FROM LAND.ST :(1976)
Comment (Reserve-Resource): A 1981 report suggested that silver deposits may occur along this vein. (Sunshine files)
Comment (Workings): SHAFT
References
Reference (Deposit): EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.
Reference (Deposit): SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.
Reference (Reserve-Resource): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.
Colorado Mining Photos
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