Wednesday, November 26, 2025

First Lithium: Preliminary Modeling Suggests Brine Widths Up To 400 Metres

The latest round of geophysical studies have been completed by First Lithium Minerals (CSE: FLM). The latest study, a Magneto-Telluric survey, was conducted at the firms OCA lithium brine project, found in northern Chile.

The MT survey is said to have been conducted on 600 metre spacing along 8 lines on two different sectors. The survey is said to have been conducted at each of the Ollague, Carcote, and Ascotan salars. The survey was used to determine an estimated distance to the base of the potential brine layer, which is beyond the scope of prior geophysical surveys conducted.

“Several geophysical surveys were conducted at the OCA project in the late 2022 and early 2023. We are pleased to report very encouraging results from the MT survey as we identified pronounced geophysical anomalies at our prospects at the salars Ollague, Carcote and Ascotan. We believe the identified highly conductive zones are indicative of brine mineralization, suggesting the potential for future discoveries,” commented CEO Rob Saltsman on the results.

WATCH: Lithium Projections & Its Future In Canada — With Rob Saltsman of First Lithium Minerals

Highly conductive horizontal zones are said to have been identified by the survey, which registered signatures of less than 1.0 Ohm-meter, suggesting brine mineralization exists at depth. The current preliminary model suggests that brine begins at a depth of 200 metres, which continues to a depth of up to 600 metres before hitting bedrock across the Andean plateau. This suggests that brine mineralization might be as much as 400 metres thick in certain regions.

Furthermore, the survey also suggests continuity of the brine mineralization in the southeastern sector of the Carcote prospects, as well as the northeastern sector of the Ascotan prospects.

The results of the geophysical surveys are slated to be combined with geologic mapping and the geochemical program conducted on the salars to identify priority targets for both exploration and drilling.

“Once the results are analyzed and integrated into our hydrogeologic model we are planning on defining targets for an inaugural exploration drilling program,” continued Saltsman.

First Lithium last traded at $0.13 on the CSE.


FULL DISCLOSURE: First Lithium Minerals is a client of Canacom Group, the parent company of The Deep Dive. The author has been compensated to cover First Lithium Minerals on The Deep Dive, with The Deep Dive having full editorial control. Not a recommendation to buy or sell. We may buy or sell securities in the company at any time. Always do additional research and consult a professional before purchasing a security.

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