High Quality Content by WIKIPEDIA articles! Turquoise Hill Resources is a Canadian mineral exploration and development company headquartered in Vancouver, British Columbia. Its focus is on the pacific rim where it is in the process of developing several large mines, the principal one being the Oyu Tolgoi Project in Southern Mongolia 200 km east of Dalanzadgad. The company was called Ivanhoe Mines until August 2, 2012 when an important financing agreement was made with Rio Tinto.