Three distinct reef facies (reef types) have been defined for the UG2 Reef at Two Rivers, namely the ‘normal facies’ with a thick main chromitite layer; a ‘split reef’ in the southern, west-central and north-eastern parts, characterised by an internal pyroxenite/norite lens of up to 6m thick and situated approximately two-thirds of the chromitite thickness upwards from the base; and a ‘southern facies’ comprising a second pyroxenite/norite lens situated approximately one-third of the chromitite thickness from the base. The Merensky Reef is the upper portion of a pyroxenite layer, with a chromitite stringer close to the contact with the hanging wall and mineralisation decreasing from the chromitite stringer into the hanging wall and footwall. Only the UG2 Reef is currently being mined.

Two Rivers holds a contiguous old order mining right over a total of 2,139ha on a portion of the farm Dwarsrivier. Mine development targeting the UG2 Reef began in 2005 and the mining layout is based on a mechanised bord and pillar design. The orebody is accessed via two decline shaft systems, situated approximately 2.5km apart. The operation is managed by ARM and Implats has a 45% interest in the joint venture.

The full Mineral Resource and Mineral Reserve statement

Download here (208KB)