Lithium Argentina AG announced an updated mineral resource and reserve estimate for the Cauchari-Olaroz brine operation, increasing Measured and Indicated resources by 42% to 28.1 Mt LCE and updating reserves to 1.4 Mt LCE supporting Stage 1 production of 40,000 tpa over 35 years. The update supports Stage 2 development targeting an additional 45,000 tpa LCE, with RIGI application and environmental permits filed in December 2025.
Key takeaways
M&I resources increased 42% to 28.1 Mt LCE at 562 mg/L lithium (from 19.9 Mt LCE at 592 mg/L)
Measured resources increased to 16.8 Mt LCE at 557 mg/L (from 3.6 Mt LCE)
Inferred resources increased to 9.6 Mt LCE at 567 mg/L (from 4.7 Mt LCE)
Proven and Probable reserves of 1.4 Mt LCE for Stage 1 at 40,000 tpa LCE over 35 years (2026-2060)
Stage 2 targets additional 45,000 tpa LCE; RIGI application and environmental permits filed December 2025
Technical report to be filed in March 2026; Stage 2 development plan expected mid-2026