The diamond miner decided to offload those units to focus on its Tongo-Tonguma project in Sierra Leone, which has the potential to generate earnings of $45 million a year.
Glencore's Zambian Mopani Copper Mines unit suspended operations in certain areas on Saturday after the Copperbelt Energy Corporation (CEC) restricted power supply to its sites in both the Kitwe and Mufulira regions.
Platinum miner Lonmin Plc said on Monday it would cut costs and sell some assets, including processing capacity of up to 500,000 ounces per year, as it battles to overcome a weak market and to preserve jobs.
Chalkstone was born out of counter-insurgency tactics used by troops in Afghanistan, but its unique methodology is now being used by miners, which can map-out power structures and counter the potentially crippling risk of strikes and political opposition.
The company that unearthed the world's second-largest diamond but has so far failed to sell it, is mulling a partnership to sell the giant stone if a buyers is not found within the next six to eight weeks.
South Africa's mineral resources department has withdrawn its plan to impose a moratorium suspending the issuance of new mining and prospecting rights, which had drawn a court challenge by an industry group.