The world's big three iron ore miners appear to be entering the final phase of a fight to increase market share in China as massive expansions drive more high-cost rivals out of business.

Fresh cracks are appearing in Roy Hill's ambitious bid to start shipping iron ore from Port Hedland by September, after major construction contracts at its port operations were torn up yesterday.

Mincor has posted a first-half loss of $1.89 million but the nickel miner will still pay a two-cents-a-share interim dividend in line with the previous corresponding period.

Resources services provider AusGroup has posted a $3.9 million profit for the first half, turning around a $13 million loss from a year earlier.

Mining group Oz Minerals is back in the black, posting a $48.5 million full year profit.

One year after its spectacular collapse, the insolvency specialists chasing funds for creditors of Forge Group have had some wins but face lengthy disputes with some of the engineering company's biggest former clients.

A man has died after a rock fall at BHP Billiton's Olympic Dam underground copper mine in South Australia.

Mines Minister Bill Marmion has warned senior Roy Hill executives the company, majority owned by Gina Rinehart, cannot hide behind its contractors over poor safety standards at the $10 billion project.

The US will remain the world's top source of oil supply growth up to 2020, even after the recent collapse in prices, the International Energy Agency said, defying expectations of a more dramatic slowdown in shale growth.

Oil jumped for a third straight session on Monday as OPEC forecast greater demand for crude this year than previously thought and projected less supply from countries outside the producer group.

Shares in Phoenix Gold were lower after the company raised $5 million in a discounted placement.