Commodities
PrimaryMica
SecondaryBeryllium, Feldspar
Commodity typeB
Deposit
Deposit sizeS
Orebody formELONGATED DIKE
Materials
Ore mineralsBeryl, Feldspar, Mica
GangueAlbite, Garnet, Quartz, Tourmaline, Xenotime
Geology
Host rockMica Schist,Pegmatite
Associated rockPegmatite
StructureWell-Developed Folds Plunge 40-50 Deg, S12-15w
AlterationSome Parts Of The Pegmatite Are Severely Altered
Economic & production
Development statusPast Producer
First production1900
Identification
Deposit ID10012469
MRDS IDD008114
Alternate namesFirestone
RegionNA
Data scoreB
Coordinates43.70329, -103.62667
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.ROBERTS, W. L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.USGS PP 247, P. 146-148.USBM INFO CIRC 7707, P. 153; USGS PP 247, P. 146.