"We’re bringing new copper projects online just as the supply squeeze hits," Bristow says.

The bid comes amid opposition from the government regarding a sale to China’s Norin Mining.

Nearly 25 million tons were transacted on the ShFE alumina contract on Wednesday, a record daily high and equivalent to almost a fifth of global annual production.

The company cut its production targets for its manganese mine in Gabon and nickel mine in Indonesia.

The main deposits, Muntanga and Dibbwi East, which account for 80% of the measured and indicated resources, achieved recoveries of 90% or better.

It said an expansion at Carlin mine, completed during a shutdown in the third quarter, would support higher throughput and recoveries in the last quarter of the year.

Barrick, the second-biggest gold miner by market value, could face a civil trial seeking unspecified damages for 32 Tanzanians living near North Mara.

It targets Zillennials, the microgeneration born between 1993 and 1998, believed to be behind the rise of lab-grown gems.