The Rhodes Ridge joint venture, made up of UK-Australian producer Rio Tinto, Japanese producer Mitsui and Australian investor AMB, will conduct a feasibility study for the 40mn–50mn t/yr Rhodes Ridge iron ore mine in Western Australia.
The joint venture expects to complete its Rhodes Ridge feasibility study in 2029, with first ore by 2030, Rio Tinto said on 15 December. It will also spend $146mn on exploration to support the project, Rio Tinto added.
Rhodes Ridge forms part of Rio Tinto's suite of mine replacement projects, which will help the producer offset production losses from older sites.
Rio Tinto-led joint venture Robe River will invest $733mn to maintain production at its 35mn t/yr West Angelas mine. It also bought Australian producer CZR Resources' developing Robe Mesa project for A$70mn ($46mn) in September.
Rio Tinto will similarly lift the capacity of its Brockman and Hope Downs projects by 34mn t/yr and 31mn t/yr, respectively, it previously announced.
Rio Tinto announced the joint venture's Rhodes Ridge study just weeks after it opened the 60mn t/yr Simandou mine in Guinea. It plans to sell 5mn–6mn t of ore from the high-grade iron ore complex in 2026, the company told investors on 4 December.
Rio Tinto also set its Australian 2026 sales guidance at 323mn–338mn, unchanged from its 2025 guidance, despite expecting 11mn t of Pilbara ore depletion.
Argus' iron ore fines 61pc Fe (ICX) cfr Qingdao price has been rising over the last six months. It was last assessed at $101.05/t on 15 December, up from $90.85/t on 16 June.

