• New gold zone identified at Carlisle, with mineralisation intersected outside the existing resource
• Analysis suggests a strong VMS affinity at Carlisle, which likely extends to the north and south
• Large hydrothermal system confirmed at Mt Kersey with broad Au and pathfinder element anomalism

Premier1 Lithium has completed a drilling program at its Yalgoo Gold Project in Western Australia, with the key highlights being the identification of a new gold zone at the Carlisle prospect and the confirmation of a large hydrothermal system at the Mt Kersey prospect. At Carlisle, the drilling has intersected high-grade gold mineralisation outside the existing Wadgingarra Inferred Mineral Resource, and analysis of the multielement geochemistry has identified a significant VMS signature in both alteration and pathfinder geochemistry. This suggests the potential for a VMS mineralisation corridor extending from Olive Queen in the north, through Cumberland and Carlisle, and open to the south. At Mt Kersey, the drilling has confirmed a large magmatic hydrothermal system with significant gold and pathfinder anomalism, and the analysis of the results and geological interpretation are ongoing, with the next steps likely to include exploration along the Mt Kersey trend to the south. Overall, the results from the drilling program have materially advanced the understanding of the Yalgoo Gold Project and highlighted the significant exploration potential across the tenement package.

The 2026 RC program has materially advanced understanding of the Yalgoo Gold Project. The results at Carlisle underscore the potential additional discoveries within the Wadgingarra area, and the identification of a strong VMS affinity at Carlisle and similar alteration and pathfinder anomalism at Olive Queen suggests that a new VHMS mineralisation corridor may exist between Olive Queen in the North, through Cumberland and Carlisle and is open to the south. The next steps for exploration are likely to include ground EM/IP geophysics at Carlisle to identify the core of the interpreted VMS system, supported by follow up drilling, and continued detailed assessment of the multi-element and alteration data at Mt Kersey to investigate the southward extension of the hydrothermal system.