Deputy president Kgalema Motlanthe's peace pact, signed earlier this month, would be tested by the underground sit in at Village's Consolidated Murchison.
Lonmin said it would keep its operations open for a second day in an effort to break a strike now in its 16th week.
The UK diamond miner has signed a term sheet with Acrux Resources in which its subisdiary will receive $7m in return for a 3% net revenue-based royalty.
Palladium futures are 16% higher this year while exchange traded products backed by the metal rose to a record on supply worries.
Some 62 contractual documents relating to mining projects in the Congo had not been made fully available to the public, said the Carter Centre.
Kibo Mining said it was finalising a memorandum of understanding with Tanzania Electric Supply Company on a power purchase agreement.
A forensic auditor at Goldrich Holdings, a company operating the Blyvoor gold mine, said he had alerted SARS to potential fraud and money laundering within the company.
Up to two-thirds of the platinum sector could be loss-making if platinum tests six year price lows, analysts said.
Petra Diamonds would consider paying dividends early to shareholders, said the firm's CEO, Johan Dippenaar.
Copper mining at Palabora Mining Company had been stopped following protests by members of a nearby community over job recruitment procedures.