NOA Lithium Brines Inc. report positive lithium results from brine samples from RG23-003, the third hole of the Phase 1 diamond drill program at its Rio Grande project. The hole was drilled within the salar, approximately 6 kilometers northwest of hole RG23-002, at the Cristina claim on the surface salar on the Project, and intersected a high-grade lithium brine aquifer of significant thickness starting from a down-hole depth of only 15 meters. Highlights include: 508.5 m (15 m ­ 659 m) grading 526 milligrams per litre ("mg/l") Li.

Brine aquifer beginning at a shallow depth of only 15 m below surface, and encountered the thickest, high-grade intercept to date at Rio Grande. Encountered highest-grade Li concentration of 785 mg/l at 250 m. Hole drilled to a depth of 676 m, resulting in the deepest reported occurrence of permeable brines at Rio Grande. Hole RG23-003 was executed with diamond drilling (HQ-size), permitting the extraction of core samples of the salar basin formations and collection of brine samples where possible.

Drilling was carried out by Salta-based Hidrotec S.A., under the supervision of NOA's geologists. The lithological profile of the third hole is in-line with other drillholes at the Project. Almost the entire depth of the +600 m hole returned brine-saturated units based on packer testing, with the exception of select horizons with a few meters in thickness.

In general, halite and interstitial sands were the dominant lithologies, with amounts of each varying along the depth. The Phase 1 drill program is planned for six holes and is designed to deliver a maiden mineral resource estimate for the Rio Grande project in early 2024.