Chile is known worldwide as the site of one of the largest copper concentrations on Earth. A total resource (including production) of about 400 million tons (Mt) of fine copper has been identified in 50 porphyry copper deposits and numerous prospects (Fig. 1). Considering 10 Mt of contained fine copper as a minimum tonnage to classify a porphyry copper deposit as a giant ore deposit, the Chilean cordillera contains nine of the 16 giant porphyries along the circum-Pacific belt. Among them are the three largest of all, El Teniente, Río Blanco-Los Bronces, and Chuquicamata (Fig. 1),...

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