SUPERIOR, Arizona-- (BUSINESS WIRE)-- Rio Tinto has approved a $144 million investment by Resolution Copper (Rio Tinto share: $79 million) to advance the next phase of development at the project in ...

Rio Tinto and the Rhodes Ridge Joint Venture 1 are jointly investing A$28 million in a partnership with Curtin University to help deliver a 7,500-square-kilometre "waterless barrier" to stop cane ...

Underground operations at the Oyu Tolgoi copper mine in Mongolia are being progressively restarted following completion of safety reviews. A seismic event on 29 October 2026 led to a localised ...

Rio Tinto confirms that at approximately 18:00 (local time) on 29 October, seismic activity occurred along a rock fault zone at Oyu Tolgoi in Mongolia, resulting in ground vibration in the underground ...

The Oyu Tolgoi copper mine in Mongolia is a world-class open pit mine and underground project. More than 80% of Oyu Tolgoi’s total value lies deep underground. We are building an underground mine ...