Rio Tinto Announces US$652 Million Investment in Continued Pre-Feasibility Studies on Deep Porphyry Copper Deposit in Arizona

Rio Tinto has announced an investment of US$652 million (Rio Tinto share US$341 million) to support continued pre-feasibility studies on a large, tier-one copper deposit at its Resolution Copper Mining LLC (RCML) operation in Superior, Arizona. Pre-feasibility studies are expected to be completed by 2012 with production at the new mine expected to start by 2020, eventually ramping up to 500,000 tonnes... 

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