South Dakota · Custer County
Past Producer
Lost Bonanza Mine
Custer County, South Dakota, United States
Mica
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USGS source ↗
Commodities
Primary
Mica
Commodity type
N
Deposit
Deposit size
S
Workings
Surface/Underground
Orebody form
DIKE
Materials
Ore minerals
Muscovite
Gangue
Plagioclase, Quartz
Geology
Host rock
Pegmatite
Associated rock
Pegmatite · Pegmatite
Alteration
Moderate Air Staining
Economic & production
Development status
Past Producer
Identification
Deposit ID
10055690
MRDS ID
SD02307
Region
NA
Data score
B
Coordinates
43.79774, -103.60362
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707