Mr. Garth Drever reports

FRONTIER LITHIUM INTERSECTS 136.7M OF 1.32% Li2O AND EXTENDS SPARK PEGMATITE

Frontier Lithium Inc. has provided an 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 136.7 m of pegmatite from surface averaging 1.32 per cent Li2O (lithium oxide).
• DDH PL-GDH-26-24 intersected 53.2 m of pegmatite from surface averaging 1.24 per cent Li2O and 26.9 m from 222.0 to 248.8 m averaging 2.12 per cent Li2O and 0.7 per cent Rb2O (rubidium oxide).
  • Including 8.4 m from 45.1 to 53.5 m averaging 2.33 per cent Li2O;
  • Including 5.0 m from 116.8 to 121.8 m of elevated Ta (tantalum) (685 ppm (parts per million) Ta2O5 (tantalum oxide)) and Sn (tin) (1,465 ppm SnO2 (tin oxide));
  • Including 7.0 m from 240.8 to 247.9 averaging 2.97 per cent Li2O and 1.04 per cent Rb2O.
• DDH PL-GDH-27-24 intersected 48.1 m of pegmatite from surface averaging 1.93 per cent Li2O and another 49.8 m from 129.7 to 179.5 m averaging 2.23 per cent Li2O with elevated Cs (0.61 per cent Cs2O) and Ta (461 ppm Ta2O5).
  • Including 8.3 m from 31.7 to 40.0 m averaging 3.33 per cent Li2O;
  • Including 5.9 m from 144.1 to 150.0 m of 3.4 per cent Li2O and 2.75 per cent Cs2O (caesium monoxide).
• DDH PL-134-24 stepped out 200 m to the west as a condemnation hole, intersected 26.8 m of pegmatite from 18.9 to 45.7 m 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 caesium and tantalum. The program also extended the Spark pegmatite 200 metres to the west," commented Garth Drever, vice-president of 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 200 m to the west, near a proposed overburden stockpile.

In addition to the diamond drilling at Spark, during February to 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.

The first attached table details the drill holes with mineralized intersections from the Spark area while the second attached table summarize all drill holes completed at Spark in 2024.

Due diligence

All scientific and technical information in this release has been reviewed and approved by Garth Drever, PGeo, the qualified person (QP) under the definitions established by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects. Under Frontier's QA/QC (quality assurance/quality control) procedures, all drilling was completed by Chenier Drilling Ltd. of Val Caron, Ont., using NQ drill rods for the geotechnical drill holes; thin walled BTW drill rods (4.2-centimetre 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 50 m 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, Ont., for sample preparation and to Calgary, Alta., for processing and quantitative multielement analysis. AGAT is an ISO accredited laboratory. The core is stored on site at the company's Knox exploration camp.

About Frontier Lithium Inc.

Frontier Lithium 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 largest in Ontario by size. The claims encompass more than 26,000 hectares and remains largely unexplored, however, since 2013, the company has delineated two premium spodumene-bearing lithium deposits (PAK and Spark), located only 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 located 25 kilometres northwest of PAK deposit within the project claims. A 2023 prefeasibility study, titled "National Instrument 43-101 Technical Report PFS PAK Lithium Project," authored by BBA E&C Inc., delivered a 24-year project life, at a posttax net present value (NPV) (at an 8-per-cent discount) of $1.74-billion (U.S.) and internal rate of return of 24.1 per cent as per the press release disseminated on May 31, 2023, and filed on SEDAR+.

We seek Safe Harbor.