Rio Tinto said on Wednesday underground mining at its biggest growth project, the Oyu Tolgoi copper mine in Mongolia, would achieve sustainable production by October 2022, according to a definitive estimate for its first panel of mining.
This would require development capital of $6.75 billion, the global miner said in a statement, adding that the mine was expected to produce 480,000 tonnes of copper per year on average from 2028 to 2036 from both the open pit and underground.
(Reporting by Rashmi Ashok in Bengaluru)
