Commodities
PrimaryFeldspar
SecondaryMica, Beryllium, Lithium
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formCRESCENT-SHAPED DIKE
Materials
Ore mineralsAmblygonite, Beryl, Biotite, Muscovite
GangueApatite, Cleavelandite, Purpurite, Quartz, Spodumene, Tourmaline, Vivianite
Geology
Host rockMica Schist
Associated rockPegmatite
StructureBlack Hills Uplift, Ridge-Like Hill
Economic & production
Development statusPast Producer
First production1880
Discovery year1880
Identification
Deposit ID10101739
MRDS IDD008126
RegionNA
Data scoreB
Coordinates43.71552, -103.66974
References
USBM INFO CIRC 7707, P. 149-150.USGS PP 247, P. 205-206.SDGS RI 44, P. 8-12.SDGS MR 10, P. 5.SDGS MR 11, P. 5.AM MIN VOL 54, P. 1312-1323.USGS PP 247, P. 206; SDGS MR 10, P. 5; SDGS MR 11, P. 5.