South Dakota · Pennington County
Past Producer
Bullion Mine Pennington County
Pennington County, South Dakota, United States
Gold
Silver
Arsenic
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USGS source ↗
Commodities
Primary
Gold, Silver
Secondary
Arsenic
Commodity type
M
Deposit
Deposit size
S
Workings
Surface/Underground
Orebody form
IRREGULAR LENTICULAR
Ore control
Shear Zone Along Diorite Dike
Materials
Ore minerals
Chalcopyrite, Gold, Pyrrhotite
Gangue
Ankerite, Biotite, Chlorite, Cummingtonite, Garnet, Graphite, Hornblende, Quartz, Sphalerite
Geology
Associated rock
Diorite
Tectonic setting
Southern Black Hills
Alteration
Surface Ore Is Oxidized
Economic & production
Development status
Past Producer
Last production
1930
Discovery year
1877
Identification
Deposit ID
10101678
MRDS ID
D007167
Region
NA
Data score
B
Coordinates
43.89829, -103.41945
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707