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Turquoise Hill controls Oyu Tolgoi, a copper-gold mining operation in Mongoliaâs Gobi desert that Rio Tinto expects will be the fourth-largest copper mine in the world by 2030.
>>> Read more: Rio Tinto Offers $2.7 Billion for Remaining Stake in Turquoise Hill
>>> Read more: Rio Tinto Offers $2.7 Billion for Remaining Stake in Turquoise Hill