South Dakota · Custer County
Past Producer
Dalmon Mica 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
Orebody form
ELLIPTICAL
Materials
Ore minerals
Mica
Gangue
Plagioclase, Quartz
Geology
Host rock
Pegmatite
Associated rock
Pegmatite
Structure
Outcrops As A Low Knoll
Alteration
Air Stained
Economic & production
Development status
Past Producer
Identification
Deposit ID
10055800
MRDS ID
SD02557
Region
NA
Data score
C
Coordinates
43.77968, -103.59445
References
USBM INFO CIRC 7707, P. 117.USGS PP 247, P. 98.