|COMPANIA CONTRACTUAL MINERA OJOS DEL SALADO||Other||Track ||100%||Freeport - McMoran Copper & Gold Inc owns 80% interest and Sumitomo Metal Mining Co. Ltd. owns 20% interest. (Feb/06)||February 27, 2006
|FREEPORT-MCMORAN COPPER & GOLD INC||Public||Monitor ||0%||Through the acquisition of Phelps Dodge in Mar/07 which owns Ojos del Salado - 80% interest. (Sep/08)||September 27, 2008
|SUMITOMO METAL MINING COMPANY LTD.||Public||Monitor ||0%||Through its 20% interest in Minera Ojos del Salado. (Feb/06)||February 27, 2006
A reported interest of 0% typically implies the existence of an option agreement.