Turquoise Hill Resources Ltd., encompassing its various subsidiary companies, operates primarily in the mining sector. Its core activities involve the exploration for and identification of valuable copper, gold, and silver mineral deposits. A key focus for the firm is the ongoing management and further development of the Oyu Tolgoi copper-gold mine, which is strategically situated in Southern Mongolia. Incorporated in 1994 and headquartered in Montreal, Canada, the company was formerly known as Ivanhoe Mines Ltd. It adopted its current name, Turquoise Hill Resources Ltd., in August 2012. Furthermore, the company functions as an integral subsidiary entity of the larger Rio Tinto Group.