NOA Lithium Brines Inc. (“NOA”) is a lithium exploration and development company with a portfolio of over 140,000 hectares across three salars—Rio Grande, Arizaro, and Salinas Grandes—in Salta Province, Argentina. The assets are located within the Lithium Triangle, a globally recognized lithium-rich region.
The Rio Grande project, NOA’s flagship asset, has extensive historical data from previous operators, including soil sampling and shallow drilling within the salar's salt crust. Lithium concentrations of up to 350 mg/L were reported. While earlier exploration focused on surface expressions, basin modeling and recent industry results suggest significant brine potential exists beyond salar margins.
Based on this, NOA prioritized acquisition of claims extending outside the salar. A Vertical Electrical Sounding (VES) survey was conducted to delineate conductive zones and target high-potential zones for drilling. Five exploration drillholes were completed—three within and two outside the salar. Results validated the conceptual model: higher lithium concentrations and porosity were encountered outside the salar footprint.
Drillhole data was supplemented by a Controlled Source Audio-frequency Magnetotellurics (CSAMT) survey over the southern claim block. This provided resistivity profiles that supported the presence of brine-saturated units beyond the drilled area.
Integration of geophysical and drilling data led to the definition of an initial resource estimate of 4.7 million tonnes of lithium carbonate equivalent (LCE) at an average concentration of 525 mg/L, classified as Measured, Indicated, and Inferred. These results place Rio Grande among the highest-grade, underexplored brine projects in the region.
NOA's exploration approach—focusing beyond traditional salar boundaries—has yielded compelling technical validation and a scalable resource base with strong development potential.