Rio Tinto Group’s copper head says he sees much more value in building mines rather than buying existing assets — comments that may disappoint industry observers anticipating another spate of mining dealmaking. The world’s second-largest mining company is looking to reach copper production of 1 million metric tons within five years — up from from about 700,000 tons. The increase would come as Rio Tinto ramps up in Mongolia, expands in Utah and engages in exploration around the world, including a venture in Chile with Codelco. “For us, the focus is organic growth, supply growth and where in projects can we partner ... (full story)