Rio Tinto secures $4.4bn financing for Oyu Tolgoi underground expansion

Rio Tinto has secured a $4.4 billion project financing deal for the underground development of the Oyu Tolgoi copper-gold mine in Mongolia, the miner said on Tuesday December 15.

Rio Tinto has secured a $4.4 billion project financing deal for the underground development of the Oyu Tolgoi copper-gold mine in Mongolia, the miner said on Tuesday December 15.

“Long-term copper fundamentals remain strong and Oyu Tolgoi as a tier one asset will be a globally important source of supply as the market moves back into structural deficit over the next few years,” Rio Tinto copper and coal chief executive Jean-Sébastien Jacques said in a statement.

The owners of Oyu Tolgoi are seeking to raise up to $6 billion of limited recourse project finance to refinance existing shareholder funding and support development of the underground phase.

The initial project finance tranche of $4.4 billion was secured on Tuesday and will be drawn down subject to customary approvals as well as Rio Tinto, Turquoise Hill Resources and Oyu Tolgoi board approvals of the underground mine development.

Twenty financial institutions have agreed to finance the second phase of the $6 billion expansion.

These include Export Development Canada, the European Bank for Reconstruction and Development, the International Finance Corporation, the Export-Import Bank of the United States, the Export Finance and Insurance Corporation of Australia and commercial lenders comprising BNP Paribas, ANZ, ING, Société Générale Corporate & Investment Banking, Sumitomo Mitsui, Standard Chartered Bank, Canadian Imperial Bank of Commerce, Crédit Agricole, Intesa Sanpaolo, National Australia Bank, Natixis, HSBC, The Bank of Tokyo-Mitsubishi UFJ, KfW IPEX-Bank and Nederlandse Financierings-Maatschappij voor Ontwikkelingslanden.

“Rio Tinto and all Oyu Tolgoi shareholders will now continue to work towards updating the feasibility study, including the revised capital estimates, and securing all necessary permits for the development of the underground mine,” the miner said.

Oyu Tolgoi is a copper-gold mine in the South Gobi region of Mongolia and is one of the largest undeveloped high-grade copper deposits in the world.

Oyu Tolgoi is 66% owned by Turquoise Hill and 34% by Erdenes Oyu Tolgoi, which is wholly-owned by the government of Mongolia. Rio Tinto owns 51% of Turquoise Hill and has managed the Oyu Tolgoi project since 2010.

About $6.4 billion has been invested to develop the open-pit mine at Oyu Tolgoi, with an additional $500 million of capital costs for initial development of the underground mine.

While all of the copper concentrate currently produced is from the open pit mine, more than 80% of the value of the Oyu Tolgoi project lies in the proposed underground mine, Rio Tinto has said.

More than 1.5 million tonnes of copper concentrate has so far been produced from the Oyu Tolgoi mine, which started production in 2013.

Shivani Singh
shivani.singh@metalbulletinasia.com
Twitter: @ShivaniSingh_MB

What to read next
The Mexico Metals Outlook 2025 conference explored challenges and opportunities in the steel, aluminum and scrap markets, focusing on tariffs, nearshoring, capacity growth and global trends.
China has launched a coordinated crackdown on the illegal export of strategic minerals under export control, such as antimony, gallium, germanium, tungsten and rare earths, the country’s Ministry of Commerce announced on Friday May 9.
Fastmarkets proposes to amend the frequency of Taiwan base metals prices from biweekly to monthly, and the delivery timing for the tin 99.99% ingot premium from two weeks to four weeks.
The US-China trade truce announced on May 12 has brought cautious optimism to China’s non-ferrous metals markets, signaling a possible shift in global trade. Starting May 14, the removal of additional tariffs has impacted sectors like battery raw materials, minor metals and base metals such as zinc and nickel, with mixed reactions. While the improved sentiment has lifted futures prices and trade activity, the long-term effects remain unclear due to challenges like supply-demand pressures and export controls.
The publication of Fastmarkets’ assessments of Shanghai bonded aluminium, zinc and nickel stocks for April 30 were delayed because of a reporter error. Fastmarkets’ pricing database has been updated. The data effective for April 30 was published on May 7 as a result. The following assessments were affected:Shanghai aluminium bonded stocksShanghai zinc bonded stocksShanghai nickel […]
Global physical copper cathodes premiums were mixed in the week to Tuesday April 15, with US market moving down, Europe rising and Asia holding largely steady.