The study estimates an after-tax net present value of $1.3 billion with an after-tax internal rate of return of 23%.

The decision is a blow to the Solwara 1 project in Papua New Guinea, once poised to be one of the world's first deep sea mining projects.

Impala Platinum, Exxaro Resources and Sibanye Stillwater are weighing bids for the copper and silver mine in Botswana.

The company says its first resource estimate for the Carangas silver-gold project in Bolivia makes it notable worldwide.

BHP said it’s moving forward with studies into potentially replacing a concentrator at Escondida.

Three Chinese groups are among suitors still in the race to acquire the Khoemacau project.

The state-run miner is not only battling to reignite copper production which is at its lowest level in 25 years, but is also facing calls to rein in its debt.

“Australia can be more than a ‘dig and ship’ nation,” Tesla Chair Robyn Denholm told a conference in Canberra.