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Rio Tinto Invests $900 Million in Chilean Lithium Venture with Codelco

The deal secures Rio Tinto a 49.99% stake in the Maricunga salt flat project, marking Chile's first major new lithium initiative in over four decades.

Maricunga salt flat is the second-largest lithium reserve in Chile with some of the world’s highest grades of the metal
Copper smelting underway at El Teniente mine, owned by Codelco, the Chilean state-owned outfit that is partnering with Rio Tinto to extract lithium
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Overview

  • Rio Tinto has committed $900 million to acquire a 49.99% stake in the Salar Maricunga SpA joint venture, with Codelco retaining a 50.01% controlling interest.
  • The Maricunga salt flat, located in northern Chile, holds the world’s second-largest lithium deposits, critical for electric vehicle and electronics batteries.
  • This partnership represents the largest foreign investment in Chile’s mining sector since the 2023 semi-nationalization of strategic lithium projects.
  • The joint venture is expected to be finalized by March 2026, aligning with long-term projections of robust lithium demand despite recent price declines.
  • The project reflects Chile’s new model of resource governance, balancing state-majority ownership with private expertise in the global race for critical minerals.