Rio Tinto Unveils Plan for Oyu Tolgoi Mine
Rio Tinto Unveils Plan for Oyu Tolgoi MineIM Mining

Rio Tinto Unveils Plan for Oyu Tolgoi Mine

Rio Tinto has unveiled a pathway for the ongoing development of the underground project at Oyu Tolgoi in Mongolia, one of the largest known copper and gold

Rio Tinto has unveiled a pathway for the ongoing development of the underground project at Oyu Tolgoi in Mongolia, one of the largest known copper and gold deposits in the world. The definitive estimate details how Oyu Tolgoi underground will achieve sustainable production for Panel 0 by October 2022 for development capital of AUD 6.75 billion. Rio Tinto and its partners, the Government of Mongolia and Turquoise Hill Resources, need to continue to work together to finalise three other milestones, the outstanding government approvals, funding and a power solution, in order to ensure that the project can commence caving operations in 2021. This will unlock the most valuable part of Oyu Tolgoi, delivering significant benefits for the shareholders of Oyu Tolgoi and the people of Mongolia.

At peak production, Oyu Tolgoi is expected to operate in the first quartile of the copper cash cost curve1 and by 2030 is expected to be the fourth largest copper mine in the world.

Oyu Tolgoi is expected to produce 480,000 tonnes of copper per year on average from 2028 to 2036 from the open pit and underground, compared with 146,300 tonnes3 in 2019 from the open pit. The underground Ore Reserve has an average copper grade of 1.52 per cent, which is more than three times higher than the open pit Ore Reserve, and contains 0.31 grammes per tonne of gold.4 The size and quality of this Tier 1 asset provides additional expansion options, which could see production sustained for many decades.

Oyu Tolgoi is jointly owned by the Government of Mongolia (34 per cent) and Turquoise Hill Resources (66 per cent, of which Rio Tinto owns a controlling interest of 50.8 per cent). Rio Tinto has been the manager of the Oyu Tolgoi project since 2010.

The open-pit mine was completed in less than 24 months and production started in 2013. Since then, more than 240 million tonnes of ore have been milled, with over one million tonnes of copper in concentrate sold.

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