1\. Beneath Argentina’s High Andean Landscapes, a Proposed Lithium Expansion Opens New Possibilities for Industry, Investment, and Battery Production

In the highlands of northwestern Argentina, the landscape can seem almost still. Broad salt flats stretch beneath an open sky, surrounded by mountains that hold mineral resources increasingly important to the global economy. Far from the factories where electric vehicles are assembled, these remote places have become part of a much larger conversation about batteries, energy storage, and the changing sources of industrial growth.

French mining group Eramet is considering another major investment in this landscape. On October 1, 2026, the company announced plans to pursue a first expansion of its Centenario-Ratones lithium operation in Salta province. The proposed project could require approximately US$350 million, subject to a final investment decision.

The expansion would add an estimated 11,000 tonnes of lithium carbonate equivalent in annual production capacity to the facility's existing nominal capacity of 24,000 tonnes. If completed as planned, the project would increase the operation's total annual capacity to approximately 35,000 tonnes. The proposal is designed as an expansion of an existing site, allowing the company to build on infrastructure and operating experience already in place.

Centenario-Ratones has already passed an important stage in its development. Eramet reported that the plant reached around 90% of its nominal capacity in June 2026, approximately one year after the beginning of its operational ramp-up. The company expects output to approach full nominal capacity by the end of the year, although actual production will depend on the facility's continued performance.

The project also uses direct lithium extraction technology, an approach intended to separate lithium from brine through an industrial process rather than relying solely on traditional evaporation ponds. The method has attracted attention as companies seek different ways to develop lithium resources. Its commercial success, however, depends on operating performance, costs, resource conditions, and the ability to maintain production at scale.

Eramet plans to seek inclusion in Argentina's Large Investment Incentive Regime, known as RIGI. The framework offers qualifying large-scale projects tax, customs, and foreign-exchange incentives, alongside regulatory stability provisions. The company says it intends to use the scheme to support the proposed expansion, although the investment itself remains conditional on a final decision.

For Argentina, the proposal comes as the country seeks to strengthen its role in global critical-mineral supply chains. Lithium is used in rechargeable batteries for electric vehicles and energy storage, and Argentina's resources have attracted international mining companies. Projects in the country's northwest offer potential employment, infrastructure investment, and export revenue, while also bringing complex questions about how local communities benefit from mineral development.

The economics of lithium remain uncertain. Prices can change with battery demand, the supply of new projects, technological advances, and the pace at which electric vehicles are adopted. A company considering a large investment must weigh the cost of construction against expected future production and market conditions. A promising resource does not automatically guarantee a profitable operation.

Environmental management is another important part of the discussion. Lithium projects in arid high-altitude regions must consider water resources, local ecosystems, and the needs of nearby communities. The way these questions are assessed and managed can influence both the long-term sustainability of a project and its relationship with the surrounding region.

For now, Eramet's proposal represents a potential next chapter rather than a completed expansion. The company has outlined the additional capacity and investment it is considering, but a final decision remains necessary. If the project proceeds, Centenario-Ratones could become a larger part of Argentina's battery-materials industry. Its eventual significance will depend on more than production figures: it will also be measured by economic durability, responsible operations, and the value created for the region around it.

### AI Image Disclaimer

The accompanying AI-generated illustrations depict lithium extraction and high-altitude landscapes for general informational purposes. They are not verified photographs of Eramet's Centenario-Ratones facility.

### Sources

Buenos Aires Times Reuters Eramet