As part of the agreement, Rio Tinto will buy Pan American Silver's 57.74% stake in the Agua de la Falda project, located in the Diego de Almagro commune, said Codelco. The Chilean company already owns 42.26% of the project.

"Evaluations by both Codelco and Rio Tinto...indicate that there is interesting exploration potential to discover copper deposits (in the area)," Codelco said in arelease.

Rio Tinto currently partners with BHP, another Australian miner, at Chile's Escondida mine, the largest copper deposit in the world.

Chile's Codelco, the world's largest copper producer, posted last week an 86% year-on-year drop in its pre-tax profit for the first half of 2023.

Copper's recent fall has pressured smaller miners to raise funds, sparking bets of more consolidation in the industry.

The new partnership comes as Glencore agreed to buy Pan American Silver Corp's majority stake in an Argentine copper project for $475 million on Monday.

(Reporting by Fabian Cambero; Writing by Isabel Woodford; Editing by Brendan O'Boyle)