The J. R. Extension is a gold and silver mine located in Pennington county, South Dakota at an elevation of 4,921 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: 4,921 Feet (1,500 Meters)
Commodity: Gold, Silver
Lat, Long: 43.94861, -103.51806
Map: View on Google Maps
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J. R. Extension MRDS details
Site Name
Primary: J. R. Extension
Secondary: Aberdeen Gold Mining & Milling Company
Commodity
Primary: Gold
Primary: Silver
Location
State: South Dakota
County: Pennington
District: Hill City District
Land Status
Land ownership: National Forest
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.
Administrative Organization: Black Hills National Forest
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Aberdeen Gold Mining And Milling Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Black Hills
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Silver
Ore: Gold
Gangue: Quartz
Comments
Comment (Location): NEAR PENALUA GULCH
Comment (Development): 5 PATENTED CLAIMS ON 70 ACRES, 1 UNPATENTED CLAIM ON 15 ACRES
Comment (Deposit): EXTENSION OF J. R. ORE BODY; VEIN IS 1.5 - 2 FT IN WIDTH
References
Reference (Deposit): US BUREAU OF MINES, 1955 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2 , BUREAU OF MINES INFORMATION CIRCULAR 7707
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