Global miners are deploying a raft of new leaching technologies that can extract low concentrations of copper from waste rock and help avoid lengthy mine permitting delays.

Barrick Gold has nearly doubled its inventory of some key supplies at mines, CEO Mark Bristow says.

The facility, which will be built in in Alabama, will have a capacity of 600,000 tonnes of finished goods a year initially.

Konkola Copper Mines was placed under provisional liquidation after the previous Zambian government accused parent company Vedanta of lying about expansion plans and paying too little tax.

The market is struggling to source diamonds after the US sanctioned Russia's Alrosa, which accounts for about a third of global supply. 

Companies commit to investigate and develop joint investment projects at different stages of the electro-mobility industry value chain.

“Much of the new developments involve smaller players in China looking to secure resource supply overseas," BloombergNEF analyst says.