Pizarro said 18 labor negotiations at Codelco's mines affected its bottom line but that productivity increases kept costs in line with industry averages.
Piotr Koper, who spent years hunting for the elusive train rumoured to be laden with gold and gems, has found two dozen priceless Renaissance portraits.
Vale SA estimates selling up to 75 million tonnes less iron ore this year, after several mines were halted following its second deadly dam burst in less than four years.