 The company was called Ivanhoe Mines until August 2, 2012 when an important financing agreement was made with Rio Tinto.In addition to operations that it runs directly (Oyu Tolgoi) Turquoise Hill Resources has a subsidiary in Australia (59% owned Ivanhoe Australia down from 81% in the summer of 2010).The Oyu Tolgoi Project is considered one of the world's largest copper and gold porphyry deposits.