Rio Tinto approves $144 million investment to advance Resolution Copper project
RIO•Rio Tinto approved a $144 million investment to advance Arizona’s Resolution Copper project, including $79 million from Rio Tinto. The funding adds to approximately $500 million in preliminary spending announced with the land exchange completed in March 2026.
1. Funding for development
The investment will support feasibility studies, final engineering and equipment purchases for underground development, as well as new water treatment facilities and ongoing exploration drilling.
2. Project ownership
Resolution Copper is owned 55% by Rio Tinto and 45% by BHP.
