ULAANBAATAR -- Mongolian officials said on Tuesday that they will "carefully review" a new plan from Rio Tinto for financing the costly expansion of the vast Oyu Tolgoi copper mine -- intimating that it could take years to reach agreement.
The rising cost of the new underground phase of the mine, now pegged at $6.8 billion, played a part in bringing down both Mongolia's previous prime minister and Rio's last chief executive.
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