Rio Tinto (ASX:RIO): Nuton Copper Enters US Data Centre Supply

Aditi Sarkar

11 November 2026 10:52 PM AEDT

Rio Tinto (ASX:RIO): Nuton Copper Enters US Data Centre Supply

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Highlights

Rio Tinto announced a two-year collaboration with Amazon Web Services in January 2026.
The arrangement uses copper from Nuton’s deployment at Johnson Camp in Arizona.
The project applies bioleaching technology to copper-bearing material.
Long-term operating performance and recovery remain subjects for continuing validation.

Rio Tinto Limited (ASX:RIO) is a diversified minerals group with substantial iron ore, aluminium, copper and other operations. One of its technology developments is Nuton, a copper bioleaching process being deployed at the Johnson Camp mine in Arizona with Gunnison Copper. In January 2026 Rio Tinto announced an agreement under which Amazon Web Services would become an initial customer for copper produced using Nuton, while contributing digital expertise to support process optimisation.

What Nuton Is Designed to Do

Nuton uses microorganisms to assist the leaching of copper from mineral-bearing rock. The technique is intended to recover copper through a heap-leach process without relying on the conventional concentrator and smelter route for all material. Rio Tinto (ASX:RIO) describes the technology as potentially suitable for certain ores that are technically challenging to process conventionally. Recovery performance depends on mineralogy, operating conditions and processing time; a reported capability is not a guarantee that all deposits will achieve the same result. The Arizona deployment is intended to provide operating evidence at industrial scale.

Johnson Camp and Commercial Collaboration

The Johnson Camp mine belongs to Gunnison Copper, and Nuton is the technology venture associated with the site's copper deployment. Rio Tinto (ASX:RIO) said in January 2026 that its collaboration with Amazon Web Services would run for two years. Under the arrangement, copper produced using Nuton is intended for components of United States data centres. The technology team will also use cloud-based analysis to model heap-leach performance, acid and water consumption and copper recovery. These activities support measurement and optimisation; they should not be confused with an independently proven production forecast for every year.

Production Targets and Environmental Measures

Rio Tinto (ASX:RIO) describes the Johnson Camp programme as targeting approximately 30,000 tonnes of refined copper over a four-year deployment period, including copper from conventional run-of-mine leaching and from Nuton technology. The total is a project target rather than a confirmed amount already produced. The company also published estimates of water intensity and carbon footprint, but such measures depend on defined accounting boundaries and operating assumptions. Comparisons between projects require consistent methodology. For assessing the technology, verified actual recovery, throughput, operating cost and environmental data over time will be more informative than an isolated design figure.

Technical Validation and Wider Significance

An industrial demonstration can establish that a process operates at meaningful scale, while still leaving longer-term reliability and Economics to be tested. Rio Tinto (ASX:RIO) has identified ongoing process monitoring and performance evaluation as important to developing Nuton. Copper-bearing material differs across deposits, so transferring the process elsewhere would require further site-specific testing. The 2026 customer collaboration is commercially relevant because it links production to a defined industrial application, but it does not resolve all technology and scaling risks. Future disclosures about copper output, recoveries and repeatability will determine how broadly the Johnson Camp experience can be applied.

Key Insights

Rio Tinto (ASX:RIO) has moved Nuton into an industrial deployment connected with a 2026 data-centre customer arrangement. The programme demonstrates a practical processing pathway, while future technical and commercial conclusions depend on sustained operating data and clearly defined measurement boundaries.

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