The Stillwater Extension claims are located approximately five miles southeast of the Stillwater Mine and cover a projected eastern extension of J-M Reef. Shoshone Silver Mining Company purchased the Stillwater Claims in 2003.
200 Total Acres/80 Hectares
The Stillwater Extension Claims are located within the Stillwater mafic-ultramafic layered intrusive complex. The uniquely PGM-enriched J-M Reef and its characteristic host rock package represent one such layer in the sequence. The PGM in the J-M Reef consist primarily of palladium, platinum and a minor amount of rhodium. The reef also contains approximately 3 percent iron, copper and nickel sulfides, plus trace amounts of gold and silver. The Johns Manville Corporation discovered palladium and platinum along the J-M Reef of the Stillwater Complex in the early 1970’s. In 1979, a Manville subsidiary partnered with Chevron to develop the property. Underground operations at the Stillwater Mine commenced in 1986.