Copper: Sumitomo to sell Chilean mine shares to South32 ...
· Japan's Sumitomo Metal Mining and Sumitomo Corp have agreed to sell their stakes in Chile's Sierra Gorda copper mine to Australian miner South32 Ltd for about billion.. The Japanese companies, which together hold a 45% stake, had reported last year that they were considering exiting the company, which they own with Polish state miner KGHM.