The Samarco dam disaster killed at least 19 people.

BHP takes $1.4b Samarco hit

BHP Billiton will report a provision of more than $US1 billion in its financial results next month to account for last year's tragic dam collapse in Brazil.

South Australia's Olympic Dam has helped BHP to its highest gold haul in 14 years.

Gold shines for BHP

Iron ore, copper and petroleum may dominate the headlines, but BHP's output of gold has quietly hit a 14 year high.

Aurizon said it was writing down the value of its rolling stock - carriages and locomotives - by $29 million before tax.

Aurizon to cut 300 jobs

The freight rail operator has written off its investment in Aquila Resources and said it was shedding about 300 jobs in response to weak coal prices.

The big four banks lent $1 billion to Arrium.

Arrium's overseas bankers baulk at Whyalla loan

Arrium's overseas banks have sought clarification before signing off on a crucial $50 million federal government loan that is hoped will improve the viability of the company's loss-making Whyalla steel plant.

Northern Star boss Bill Beament reckons gold prices may run higher if Donald Trump wins his way to the White House.

US election a Trump card for gold

Gold prices will surge if Donald Trump is successful in winning his way to the White House, says one of Australia's fastest growing gold miners