South Dakota · Custer County
Past Producer

Custer Mountain Lode

Custer County, South Dakota, United States
BerylliumFeldsparMicaLithiumTantalum
⌖ Show on mapUSGS source ↗
Commodities
PrimaryBeryllium, Feldspar, Mica, Lithium
TertiaryTantalum
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface
Orebody formIRREGULAR
Materials
Ore mineralsBeryl, Feldspar, Lepidolite, Mica, Spodumene
GangueAndalusite, Apatite, Cassiterite, Lazulite, Lithiophilite, Pyrite, Quartz, Sillimanite, Tourmaline, Triphylite, Uraninite
Other materialsAmblygonite
Geology
Host rockMica Schist,Pegmatite
Associated rockPegmatite
Economic & production
Development statusPast Producer
Identification
Deposit ID10055762
MRDS IDSD02505
Alternate namesSnookum
RegionNA
Data scoreB
Coordinates43.75524, -103.56584
References
USBM INFO CIRC 7707, P. 100USGS PP 247, P. 97-98SDGS RI 50, P. 37-56.