Announcement • Sep 01

Bradda Head Lithium Announces Additional High-Grade Surface Assay Results and Commences Phase 3 Drilling At Whistlejacket Lithium Project

Bradda Head Lithium Ltd. announced additional high-grade surface assay results from its Whistlejacket Lithium Project, held under the Company's Option to Joint Venture agreement with Kennecott Exploration Company. The results represent the third and final phase of Bradda Head's 2026 rock-chip sampling programme and further strengthen several priority targets as the Company transitions into the Phase 3 drilling programme currently being conducted on the project and first programme under Bradda Head. Combined with Kennecott Exploration Company's historical exploration data, the results provide additional geological and geochemical support for testing the continuity, geometry and potential scale of the spodumene-bearing pegmatite system at depth. The latest batch of surface samples return high-grade lithium assays of up to 3.90% Li2O. Of the 41 rock samples analyzed, 19 (46.3%) returned grades above 0.50% Li2O, including 15 samples (36.6%) above 1.00% Li2O and 13 samples (31.7%) above 1.50% Li2O. Results further strengthen several priority targets, including areas identified by Kennecott Exploration Company and new targets generated by Bradda Head Lithium Ltd, providing further geological support for the Phase 3 drilling programme. Geochemical results continue to indicate a well-fractionated LCT pegmatite system, with elevated tantalum, niobium, cesium and rubidium supporting the interpretation of rare-element enrichment. All 41 rock samples returned low iron contents below 1.0% Fe, with the majority below 0.4% Fe, consistent with the low-iron characteristics observed across the Whistlejacket pegmatites. Surface samples were received from the third round of surface sampling at Whistlejacket. The surface sampling continued to focus on both new targets generated by the Bradda Head Lithium Ltd. exploration team and prospective areas previously identified by Kennecott Exploration Company, increasing sample coverage across the project and providing additional geochemical information to further refine and support priority drill targets. Bradda Head Lithium Ltd. has now received laboratory results for a total of 303 surface samples, with the latest 43 samples forming the basis of this announcement. These results conclude the planned 2026 rock-chip sampling programme, with the Company's exploration activities now transitioning to the Phase 3 drilling programme, where the focus will shift to testing the continuity, geometry and potential scale of the spodumene-bearing pegmatites at depth. A total of 43 samples were submitted to SGS Canada Inc. for analysis, comprising 41 rock samples and two Certified Reference Materials for quality control purposes. Of the 41 rock samples, 19 returned grades exceeding 0.50% Li2O, including 15 samples grading above 1.00% Li2O and 13 samples exceeding 1.50% Li2O. Sampling continued to focus on pegmatites ranging from 1.0 to 6.0 meters wide, hosting coarse-grained spodumene crystals. The highest assay returned 3.90% Li2O from a near-horizontal pegmatite estimated to be 4 meters thick, located southeast of the main target areas. Lithium grades across the rock samples ranged from 0.01% to 3.90% Li2O. All 41 rock samples returned low iron contents (<1.0% Fe), with the majority containing less than 0.4% Fe, further supporting the favorable mineralogical and potential metallurgical characteristics of the project. In addition to lithium, the sampling programme returned elevated concentrations of tantalum, niobium, cesium and rubidium, consistent with rare-element enrichment and supporting the interpretation of a well-fractionated pegmatite system at Whistlejacket. The addition of these samples has highlighted three prospective target areas east and southeast of the previously explored area, thus broadening the pipeline of targets available for current and future drilling. Targets A and B comprise steeply dipping to near-vertical pegmatites having widths from 1 to 6m. The new surface geochemistry and visible spodumene in the pegmatites will support Target A where the company has permitted drill sites and associated access roads, while Target C is characterized by a sub-horizontal pegmatite in an area under further review for future permitting. Collectively, these areas expand the Company's inventory of prospective targets and provide additional opportunities for follow-up exploration and potential inclusion in future drilling programmes. Rock-chip samples were collected under the supervision of Hugo Zuniga, Senior Project Manager. Sample locations were recorded in the field, and samples were bagged, secured and transported to the Company's core facility before delivery by Company personnel to the SGS preparation facility in Tempe, Arizona. Following sample preparation, pulps were shipped to SGS Laboratories in Burnaby, British Columbia, Canada, for analysis using sodium peroxide fusion with ICP-AES and ICP-MS finish (method GE_ICM90A50). Certified reference materials were inserted into the sample stream as part of the Company's QA/QC procedures and reviewed by Hugo Zuniga. The Company Qualified Person (QP), Mr. Joey Wilkins, consents to the inclusion of the technical information in this release and the context in which it appears. The Whistlejacket Project comprises nine Arizona State Land Department Mineral Exploration Permits covering 2,010.7 hectares. The project is subject to a definitive option-to-joint-venture agreement with Kennecott Exploration Company and targets spodumene-bearing pegmatites. Kennecott Exploration Company's previous exploration included 19 diamond drill holes totalling 4,188 m, all of which intersected lithium mineralisation. Reported results include 51.0 m at 1.11% Li2O in hole WSTL0009 and 19.47 m at 1.66% Li2O in hole WSTL0008. Surface mapping, sampling, airborne geophysics and high-resolution aerial imagery have also contributed to the geological dataset for the project.

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