JOHANNESBURG--October 18, 2012--Written by Richard Finlayson, Senior International Editor for Industrial Info Resources (Sugar Land, Texas)--Resource nationalism has reared its head in Mongolia, where Rio Tinto plc (NYSE:RIO) (London, England) has rejected the government's persistent requests for the terms of agreement on the Oyu Tolgoi copper and gold project to be altered. Other companies featured: Ivanhoe Mines (NYSE:IVR) , Chinalco (NYSE:ACH)