| Lat / long: | 43.74686, -103.72057 |
| Tertiary: | Niobium (Columbium), Tantalum |
| Operation type: | Surface-Underground |
| Development status: | Past Producer |
| MAS | 460330027 |
| DEP | 10226404 |
| Reference | {Deposit:: STAATZ M H ET AL EXPLORATION FOR BERYLLIUM AT THE HELEN BERY}{Deposit:: RN AND TIN MOUNTAIN PEGMATITES CU}{Deposit:: STER COUNTY S DAKOTA U S G S PROF PAPER 297-C 1963 PP175-195}{Deposit:: PAGE L R ET AL PEGMATITE INUES 1942-45 BLACK HILLS S DAKOTA}{Deposit:: OF PAPER 247 1953 PP197-201} |
| Reporter | South Dakota School of Mines |