Rio Tinto Announces US$652 Million Investment in Continued Pre-Feasibility Studies on Deep Porphyry Copper Deposit in Arizona
August 4th, 2008… a large, tier-one copper deposit at its Resolution Copper Mining LLC (RCML) operation in Superior, Arizona. Pre-feasibility studies … (coal and uranium), gold, industrial minerals (borax, titanium dioxide, salt, talc) and iron ore. Activities span the world but are …