Lithium Argentina AG

Sampling, Analysis and Data Verification

Sampling Method

Drilling was subject to daily scrutiny and coordination by Minera Exar geologists. On the drill site, the full drill core boxes were collected daily and brought to the core storage warehouse where the core was laid out, measured and logged for geotechnical and geological data and photographed.

Core boxes were placed on core racks and covered with a black PVC sheet to protect the integrity of the core and stored outside. RBRC values were not measured during the 2017-2018 drilling, but 33 drill samples were tested for RBRC during the 2019 drilling campaign and the results were in line with other RBRC sampling. The core was well logged to include the lithological data required for the Mineral Resource estimate.

During RC drilling, Minera Exar personnel recorded the time it took to advance one meter and sampled the cutting by placing them in a rock chip tray and brought them back to the field office for logging. Samples were not taken during RC drilling for chemical analysis. During diamond drilling, PQ or HQ diameter cores were collected through a triple tube sampler. The cores were taken directly from the triple tube and placed in wooden core boxes for geologic logging, sample collection, and storage. Undisturbed samples were shipped to D.B. Stephens & Associates Laboratory in the United States for analysis of geotechnical parameters. Brine samples were further analyzed in the field laboratory for confirmation of field parameters. After analysis of field and filed laboratory parameters, brine samples were split into three, 250 ml, clean, plastic sample bottles. Two samples were mixed to form one sample, one for density and one for geochemistry, which was shipped to Alex Stewart Argentina in Jujuy or sent to the onsite Minera Exar laboratory.

Security

Samples were taken daily from the drill sites and stored at the on-site facility. All brine samples were stored inside a locked office, and all drill cores were stored inside the core storage area on-site. Brine samples were taken by Minera Exar staff to the on-site laboratory or transported to Jujuy in a company truck. Solid samples were periodically driven to Jujuy which is approximately three hours from the site. In Jujuy, solid samples were delivered to a courier for immediate shipment to the appropriate analytical laboratory.

Assaying and Analytical Procedure

Brine samples were analyzed by Alex Stewart Argentina, a laboratory independent from the Company, and the internal Minera Exar laboratory. Alex Stewart Argentina used inductively coupled plasma as the analytical technique for the primary constituents of interest, including: sodium, potassium, lithium, calcium, magnesium and boron. Samples were diluted by 100:1 before analysis. Density was measured via pycnometer and sulphates were measured using the gravimetric method. The argentometric method was used for assaying chloride and volumetric analysis was used for carbonates. In the internal Minera Exar laboratory, a 20 g sample was taken from the 250 ml bottle. The sample was entered into the laboratory database. Sulphates were measured using the gravimetric method and volumetric analysis was used for calcium, magnesium and chloride. Brine samples were diluted before being passed through the AA spectrometer, which analyzes lithium, sodium and potassium.