Commodities
PrimaryBeryllium, Mica, Feldspar
SecondaryTantalum
TertiaryLithium
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formELLIPTICAL
Materials
Ore mineralsAlbite, Beryl, Lithiophilite, Microcline, Muscovite
GangueApatite, Cassiterite, Garnet, Pyrite, Pyrrhotite, Quartz, Tourmaline, Uraninite, Uranophane, Vivianite, Zircon
Geology
Host rockMica Schist · Quartz Two-Mica Schist
Associated rockPegmatite · Pegmatite
Economic & production
Development statusPast Producer
First production1907
Identification
Deposit ID10055707
MRDS IDSD02328
Alternate namesRoss Mine, John Ross Lode
RegionNA
Data scoreB
Coordinates43.76635, -103.67863
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707FISHER, D.J., 1945, PRELIMINARY REPORT OF SOME PEGMATITES NEAR CUSTER, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 50ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18