"The company has presented an inflation linked, five-year offer comprising fixed average annual wage increases of 6% and above for bargaining unit employees for a three-year period, followed by CPI-linked agreements in years 4 and 5, as well as notable increases in benefits," Sibanye said in a statement.

The company said this deal will result in meaningful gains for employees at its Rustenburg and Marikana operations.

The miner added that the third union, the Association of Mineworkers and Construction Union (AMCU), has declared a dispute, which has been referred to the Commission for Conciliation, Mediation and Arbitration (CCMA) for conciliation.

(Reporting by Anait MiridzhanianEditing by James Macharia Chege)