Frontier Lithium Inc. (TSX-V: FL) (FRA: HL2) (OTCQX: LITOF) is pleased to announce update on the winter work program with results from five geotechnical holes drilled on the Spark pegmatite to advance the first phase of definitive feasibility study.

Highlights

• DDH PL-GDH-24-24 intersected 136.7m of pegmatite from surface averaging 1.32% Li₂O.
• DDH PL-GDH-26-24 intersected 53.2m of pegmatite from surface averaging 1.24% Li₂O and 26.9m from 222.0 to 248.8m averaging 2.12% Li₂O and 0.7% Rb₂O.
  • Including 8.4m from 45.1 to 53.5m averaging 2.33% Li₂O
  • Including 5.0m from 116.8 to 121.8m of elevated Ta (685 ppm Ta₂O₅) and Sn (1,465 ppm SnO₂).
  • Including 7.0 m from 240.8 to 247.9 averaging 2.97% Li₂O and 1.04% Rb₂O
• DDH PL-GDH-27-24 intersected 48.1m of pegmatite from surface averaging 1.93% Li₂O and another 49.8m from 129.7 to 179.5m averaging 2.23% Li₂O with elevated Cs (0.61% Cs₂O) and Ta (461 ppm Ta₂O₅)
  • Including 8.3m from 31.7 to 40.0m averaging 3.33% Li2O
  • Including 5.9m from 144.1 to 150.0m of 3.4% Li₂O and 2.75% Cs₂O
• DDH PL-134-24 stepped out 200m to the west as a condemnation hole, intersected 26.8 m of pegmatite from 18.9 to 45.7m confirming that the Spark pegmatite remains open.

“The geotechnical winter diamond drill program yielded consistent drill intersections with the two northern holes confirming and extending a high-grade lithium zone, with enriched cesium and tantalum. The program also extended the Spark pegmatite 200 metres to the west,” commented Garth Drever, VP Exploration of the Company. “Although width and lithium values were low, based on existing drill intercepts to the east, we expect the pegmatite to increase in both grade and width with depth.”

During the winter season, four geotechnical holes (PL-GDH-24 to 27-24) were drilled from the top of Spark in four directions to test pit-wall stability and hydrogeological conditions. As expected, mineralized pegmatite was intersected in all holes. A fifth condemnation hole was drilled 200m to the west, near a proposed overburden stockpile. Figure 1 shows the project area from the Knox camp to the Mining Lease area. Figure 2 is a map of the Spark deposit highlighting the 2024 drilling and displaying all drill holes.

In addition to the diamond drilling at Spark, during February-March geotechnical drilling continued on potential infrastructure sites including stockpiles, tailing management, mill and other related facilities. Environmental studies and monitoring continued and well as community engagement. All work was conducted out of the Knox camp situated on the winter road to Deer Lake as shown on Figure 1.

Table 1 details the drill holes with mineralized intersections from the Spark area while Tables 2 summarize all drill holes completed at Spark in 2024.

Table 1:  Summary of 2024 Drill Hole Intersections at Spark

Table 2: Summary of 2024 Drilling at Spark

Due Diligence

All scientific and technical information in this release has been reviewed and approved by Garth Drever, P.Geo., the qualified person under the definitions established by National Instrument 43-101 – Standards of Disclosure for Mineral Projects.  Under Frontier’s QA/QC procedures, all drilling was completed by Chenier Drilling Ltd. of Val Caron, Ontario using NQ drill rods for the geotechnical drill holes; thin walled BTW drill rods (4.2 cm core diameter) for all other holes and a Reflex ACT III oriented core system. Using the Reflex system, the drill core was oriented and marked as it was retrieved at the drill.  A Reflex GYRO Sprint-IQ survey instrument was used every 50m downhole and again at the end of each hole when rods were pulled out.  A Reflex North Finder APS unit was utilized to complete accurate positioning and orientation of the drill collar upon setup. The core was boxed and delivered to the Frontier core shack where it was examined, geologically logged, and marked for sampling. The core was photographed prior to sampling.  Using a rock saw, the marked sample intervals were halved with one-half bagged for analysis. Sample blanks along with lithium certified reference material was routinely inserted into the sample stream in accordance with industry recommended practices. Field duplicate samples were also taken in accordance with industry recommended practices. The samples were placed in poly sample bags and transported to AGAT Laboratories Ltd. (AGAT) in Thunder Bay, Ontario for sample preparation and to Calgary, Alberta for processing and quantitative multi-element analysis. AGAT is an ISO accredited laboratory. The core is stored on site at the Company’s Knox exploration camp.

About Frontier Lithium

Frontier Lithium Inc. is a preproduction business with an objective to become an integrated strategic domestic supplier of spodumene concentrates for industrial users as well as battery-grade lithium hydroxide and other chemicals to the growing electric vehicle and energy storage markets in North America. The Company’s sole project maintains the largest land position and resource in a premium lithium mineral district located in Ontario’s Great Lakes region.

About the PAK Lithium Project

The PAK lithium project contains North America’s highest-grade lithium resource and is the second largest in North America by size. The project encompasses close to 27,000 hectares and remains largely unexplored; however, since 2013, the company has delineated two premium spodumene-bearing lithium deposits (PAK and Spark), located 2.3 kilometres apart. Exploration is continuing on the project through two other spodumene- bearing discoveries: the Bolt pegmatite (located between the PAK and Spark deposits), as well as the Pennock pegmatite (25 kilometres northwest of PAK deposit within the project claims). A 2023 Pre-Feasibility Study “National Instrument 43-101 Technical Report PFS PAK Lithium Project” by BBA E&C Inc., delivered a 24- year project life, delivering a post-tax NPV(8%) of US$1.74 billion and IRR of 24.1% as per the press release disseminated on May 31, 2023, and was filed on Sedar.com.

Figure 1: Location Map showing project area with existing and proposed PFS Infrastructure (CNW Group/Frontier Lithium Inc.)

Figure 2: Spark outline showing drill hole detail for the 5 holes reported. (CNW Group/Frontier Lithium Inc.)