Chile’s Escondida mine boosts BHP copper output

[caption id="attachment_792361" align="aligncenter" width="600"] Escondida mine.[/caption] Copper output at BHP Billiton (ASX:BHP), the world's largest miner, jumped 1.8% during its fourth fiscal quarter to 470,000t from 461,700t in the same period last year as a result of improvements at the miner’s...