Australia’s carbon tax may slash coal industry value by $8.7 billion

South32, Orion Minerals, Perenti and DRA Global are among the winners.

The departures came after global prices of the key steel-making ingredient tumbled almost 40%.

Perseus Mining's interest in Predictive Discovery, which is advancing the Bankan gold project in Guinea, is now 19.9%.

The mine, in the Hunter Valley region, was placed on care and maintenance in late 2006 because of operational difficulties and lower coal prices.