12 porphyry
12. he Grasberg Mine is located in the province of Papua, in Indonesia, the highest mountain in Papua, and it has 19,500 employees. The 2006 production was 610,800 tonnes of copper; 58,474,392 grams of gold; and 174,458,971 grams of silver. Grasberg porphyry Cu-Au deposit, Papua, Indonesia. 13.