2012 Half Year Results Presentation - Antofagasta plc

Antucoya• Development of Antucoya project continued to progress during H12012, with all EPC contracts now executed• Transaction with Marubeni Corporation, to become a 30% partnerclosed in July 2012• SX-EW operation with an annual cathode production of approximately80,000 tonnes with cash costs expected to be 155c/lb on averageover the life of the operation• Total development cost expected to be $1.7 bn• Construction expected to be completed in H2 201417