South Dakota · Custer County
Occurrence
Bonnie Lode
Custer County, South Dakota, United States
Mica
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USGS source ↗
Commodities
Primary
Mica
Commodity type
N
Deposit
Deposit size
N
Workings
Underground
Orebody form
NARROW DIKE
Materials
Ore minerals
Mica
Geology
Host rock
Pegmatite
Associated rock
Pegmatite
Tectonic setting
Southern Black Hills
Alteration
Air Staining
Economic & production
Development status
Occurrence
Discovery year
1943
Identification
Deposit ID
10055713
MRDS ID
SD02435
Region
NA
Data score
C
Coordinates
43.62885, -103.61445
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707