Sibanye-Stillwater has revised its offer for Lonmin, with new terms that gave a valuation for the struggling platinum miner that was about $77m less than originally proposed.
The company, South Africa's largest gold producer, has run up losses of about 1.6 billion rand ($114 million) and about 110,000 ounces of missed gold output because of the labour action.
Opponents to mining projects in South Africa are often harassed, threatened and sometimes even killed, according to a report by a group of human rights advocates including Human Rights Watch.