Rio Tinto, Mongolia to Continue Oyu Tolgoi Funding 2 days 10 hours 50 minutes ago - Dow Jones News MELBOURNE--Rio Tinto PLC (RIO) and Mongolia have agreed to continue funding the US$6.2 billion Oyu Tolgoi copper and gold mine in the Gobi Desert, keeping it on track to begin producing in June as they try to resolve a dispute over costs.
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