Rio Tinto faces having to renegotiate terms at Oyu Tolgoi

BHP sells the Pinto Valley copper mine and the associated San Manuel Arizona Railroad Company to Capstone Mining for $650m.

BHP Billiton employees working at Pinto Valley and SMARRCO will become employees of Capstone as part of the transaction.

How the mighty have fallen.

Copper and silver king turned environmentalist Ross Beaty sees stagnant global growth, but strong fundamentals for gold. Here he shares his views, and a few memorable moments in his career — on both sides of the industry.

Carlos Slim's mining firm reports strong Q1 profits.

Goods sold included aluminum oxide as well as other commodities.

Company cites declining commodity prices and weaker currencies as part of a more challenging business environment.

Rio Tinto's hand strengthened in bitter negotiations over future of TRQ's massive mine after S&P cites mining policy as a reason for country's credit downgrade.

Federal government re-starts skilled-worker program on May 4.