"[W]e expect growth in China to ease modestly over the short-term, as monetary policy tightens and housing and automotive markets soften," Mackenzie said.
It will sell its newest mine to Harmony Gold for $300 million and another mine for 100 million rand ($7.4 million) to China's Heaven-Sent SA Sunshine Investment Company.
It expects an average global copper price of $2.95 per pound in 2018, a sharp upward revision from its mid-year estimate of $2.68, due to greater demand in China.