Rio said the landslip had been expected based on geo-technical monitoring at the mine, and all personnel had been removed from the area in advance to ensure safety.

Peru's presidential front-runner is taking aim at copper mining firms' coveted tax stability agreements that freeze tariffs, and the plan could have an outsized impact on Chinese miners.

The CGO East area has continuous nickel-copper mineralization over a strike length of more than 500 metres.

The 200-member union walked off the job last Thursday.

It plans to invest C$25 million in studies that will look at the potential to create a local battery metals supply chain in the province.

The Serrote copper-gold development will produce 22,000 tonnes per year copper-equivalent over an initial 14-year mine life.

Money managers have reduced their net long positioning on the CME copper contract by almost 30% in the space of three weeks.