The volume of recoverable copper reserves at Rio Tinto's Oyu Tolgoi mine has dropped by 15% in the latest mine plan, according to a regulatory filing released on Friday July 3.
The reductions have been significant at Oyu Tolgoi, which is one of the world's largest known copper and gold deposits.The Australia-listed miner said the estimate of recoverable copper from the Mongolian project was now 6.17 million tonnes as of July 1, 2020. That compares with 7.3 million tonnes at the end of last year.
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