South Dakota · Custer County
Past Producer
Midas 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
DIKES
Ore control
Mica Is Most Common Around The Outer Edges And In The N 200 Ft Of The Dike.
Materials
Ore minerals
Mica
Gangue
Albite, Quartz
Geology
Host rock
Mica Schist
Associated rock
Pegmatite
Economic & production
Development status
Past Producer
Identification
Deposit ID
10012459
MRDS ID
D008102
Region
NA
Data score
B
Coordinates
43.70024, -103.60028
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.USGS PP 247, P. 157.