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Lithium Argentina AG filed Exhibit 99.1, the 2026 Cauchari-Olaroz S-K 1300 Technical Report for the Cauchari-Olaroz Salars in Jujuy Province, Argentina, effective February 27, 2026. The report details property description, mineral resources and reserves, mining methods, processing for a 40,000 tpa lithium carbonate plant, infrastructure, costs, and environmental studies, updating prior 2025 estimates.
Key Takeaways
1Effective date of report: February 27, 2026
2Prepared by qualified persons: David Burga P.Geo., Mark King PhD P.Geo. FGC, Anthony Sanford Pr.Sci.Nat., Marek Dworzanowski EUR ING CEng., Jonathan Gibson P.Eng., Alexander Cushing PhD MFin P.Eng.
3Updates 2026 Mineral Resource and Mineral Reserve estimates from Burga et al. 2025
4Covers brine processing and lithium carbonate plant production for 40,000 tpa plant
5Includes SQM Joint Venture and Ganfeng Joint Venture property arrangements
6Provides capital cost estimate for Exar 40,000 tpa plant and operating cost estimates