(Reuters) - BHP Billiton Ltd <BHP.AX> said on Tuesday it is looking at an expansion at its Olympic Dam copper mine in south Australia, which could sharply lift annual production capacity from the project.
The company added that the Brownfield Expansion option at Olympic Dam was an example of a project with the potential to deliver sustainable returns to shareholders.
"If approved, the BFX option (Brownfield Expansion option)could lift production capacity to 330 kilotonnes per annum and move Olympic Dam into the first quartile of the cost curve," Olympic Dam Asset President Jacqui McGill said at a briefing in Adelaide.
(Reporting by Shashwat Pradhan in Bengaluru; Editing by Dan Grebler)
