South Africa-based Tharisa has announced plans to invest $547m (R9.46bn) in an underground platinum group metals (PGM) mining project over the next ten years. The company plans to shift its declining open-pit PGM and chrome co-producing Tharisa mine, located on the Bushveld complex, to underground mining within the next decade. Tharisa CEO Phoevos Pouroulis said: “The underground project is the natural progression for our operations and has been established to increase the life-of-mine development to a ...