Stillwater Mining Company will develop two platinum and palladium projects in Montana's Beartooth Mountains, in the US.
The Graham Creek project and the Blitz project will be located along the Stillwater Complex.
The aim of the Graham Creek project is to extend the development of the neighbouring East Boulder Mine ore resource about 7,900ft to the west.
Stillwater chairman and CEO Francis McAllister said: "Historical surface drilling along the 28-mile extent of the Stillwater Complex confirmed continuous palladium and platinum mineralisation essentially along the full extent of the JM Reef, but extensive portions of the reef still await more detailed delineation."
The East Boulder project could potentially develop up to six million additional tons of ore grading on the order of 0.41 in-situ ounces a ton.
The Blitz project will extend some 13,500ft to the east of the existing Stillwater Mine via two conventionally driven footwall laterals from the 5,000 and 5,600 levels.