FILE PHOTO: Sheets of copper cathode are pictured at BHP’s Escondida, the world’s biggest copper mine, in Antofagasta, northern Chile March 31, 2008. Picture taken March 31, 2008. REUTERS/Ivan Alvarado/File Photo Photo: ivan alvarado/ReutersBHP BHP 1.28 %increase; green up pointing triangle Group reported a 10% rise in third-quarter copper output due to higher volumes from the giant Escondida mine, and flat iron-ore output as recent improvements to its operations helped offset the impact of tropical cyclone ...