BHP, which operates the world’s biggest copper mine in Chile, has dangled $10 billion to develop more resources in the country if those uncertainties are finally resolved.
There were no immediate reports of any injuries or deaths from the latest dam wall collapse at the dormant diamond mine, which was once owned by De Beers.
One of the world's largest copper mines has suffered recurrent disruptions from indigenous Peruvian communities who say its vast mineral wealth has not translated into better living conditions.