Despite gold's price slump, strong copper and iron ore prices lifted MINING.COM's ranking of the world's 50 most valuable miners to a new record high of $1.35 trillion.
Company is at the centre of deal talks in the gold sector but it may see its desire to create a South African gold champion thwarted as peers cut exposure to the country.
Local unit is in talks with authorities to permanently address violent protests around its operations, before resuming work on the Zulti South project.
Glencore declined to say how much acid was spilled from the tank, but said KCC immediately contained the spill and conducted follow-up monitoring of the environment.
The billionaire claims Vale is misleading investors by claiming local prosecutors had closed an investigation into alleged illegal practices related to Simandou.