A passenger train on a test run by Chile's state rail operator collided with a private cargo train carrying about 1,346 metric tons of copper on Thursday.
The mining giant sees the potential to expand production capacity to about 500,000 tons of copper by 2028 mainly through improvements to its Salobo and Sossego mines in Brazil.
The southern African nation, one of the top crude producers on the continent, has become a focus for the US in its campaign to secure critical minerals such as copper as it competes against China.
