First Lithium Minerals Corp. announced the commencement of Magneto-Telluric (MT) geophysical surveys on its 100% owned OCA lithium project (OCA Project) in the Antofagasta Region of northern Chile. SouthernRock Geophysics S.A. has been contracted to conduct the geophysics with Magneto-Telluric surveying to define the base of the highly conductive intervals identified by Transient Electromagnetic (TEM) geophysical surveying undertaken by the Company in fourth quarter 2022.

MT is an electro-magnetic technique that uses naturally occurring passive telluric sources to define the sub-surface resistivity structure as a proxy for mapping geological contacts and structures to depths of up to several kilometres. The principal objective of the MT geophysical survey is to further define the distribution of highly conductive horizontal zones of less than 1.0 Ohm-meter at depths below 400m, beyond the scope of the TEM surveying, on two identified sectors at northeastern prospect areas at the salar de Ascotan (approx. 1,775 ha) and salar de Carcote (approx.

1,275 ha) including the southern prospect area of the salar de Ollague (approx. 300 ha). The proposal contemplates a total of 60 Tensor MT sites spaced 600m along 3 lines at Ascotan and a further 5 lines at the Ollague-Carcote area.