South Dakota · Custer County
Occurrence
Ixl Lode No. 3 Feldspar Prospect
Custer County, South Dakota, United States
Mica
Feldspar
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USGS source ↗
Description
Scovel Johnson
Commodities
Primary
Mica, Feldspar
Commodity type
N
Deposit
Deposit size
N
Workings
Surface
Materials
Ore minerals
Feldspar, Mica
Gangue
Quartz
Geology
Host rock
Schist,Pegmatite
Associated rock
Pegmatite,Granite · Harney Peak Granite
Structure
Fractures Normal To Wall Of Dike.
Economic & production
Development status
Occurrence
Discovery year
1937
Identification
Deposit ID
10055798
MRDS ID
SD02554
Region
NA
Data score
B
Coordinates
43.79829, -103.52917
References
USGS PP 247, P. 136USBM INFO CIRC 7707, P. 110