UK-Australian metals firm Rio Tinto produced 204,400t of copper in the July-September quarter, up 10pc on the year, as it ramped up operations at the Oyu Tolgoi mine in Mongolia. The company kept its 2025 copper production guidance unchanged at the upper end of its 780,000-850,000t range in an operations review on 14 October. Rio Tinto produced 89,200t of copper concentrate at Oyu Tolgoi in July-September up by 78pc on the year from 50,000t. It plans to ramp up copper production at the mine to 500,000 t/yr by 2028. At its Kennecott mining complex in Utah, Rio Tinto produced 13,000t of refined copper during ... (full story)