Turquoise Hill Resources Ltd., together with its subsidiaries, operates as a mining company. The company primarily explores for copper, gold, and silver deposits. It engages in the operation and development of the Oyu Tolgoi copper-gold mine located in Southern Mongolia. The company was formerly known as Ivanhoe Mines Ltd. and changed its name to Turquoise Hill Resources Ltd. in August 2012. Turquoise Hill Resources Ltd. was incorporated in 1994 and is headquartered in Montreal, Canada. Turquoise Hill Resources Ltd. operates as a subsidiary of Rio Tinto Group.