Beryllia Drilling Critical Mineral Exploration September 2025 Geophysics and Drilling Collaborations Bloodwood Project Area Northern Territory, Australia (Tenement EL 33202)

Abstract

URO's Beryllia target comprises a greisen-altered granite system enriched in tin and beryllium and cut by copper-bearing and fluorite-rich hydrothermal quartz veins. Historical work has defined robust surface geochemical anomalies, but the subsurface extent of mineralisation remained untested. The current drill programme represents the first attempt to assess mineralisation at depth and refine the geological model. The recent drilling programme focused on evaluating the depth extent of mineralisation, which had previously only been tested through surface exploration. Extensive geological mapping, surface sampling, and a hyperspectral geophysical survey identified promising targets for drilling. The programme aimed to test multiple targets within URO's Beryllia prospect. Namely the depth extent of greisenised zones mapped at surface and their association with tin and beryllium mineralisation. Additionally, the continuity of identified fluorite and sulphide bearing veins to evaluate their potential for mineralisation down-dip. Thus, exploring the economic potential of tin, beryllium, fluorine and copper deposits at depth. The drilling was strategically targeted at perpendicular vein intersections to maximise the chances of encountering significant mineralised zones. The primary elements of interest were tin, beryllium, fluorine and copper. Copper is key in renewable technologies like electric vehicles, solar, and wind, while beryllium is essential for high-performance alloys in electronics and energy-efficient tech. The rising demand for these minerals highlights the importance of URO's exploration efforts, which could support the shift towards sustainable energy and technological progress. The RC drilling campaign took place over 6 days, from September 1 to 6, 2025. Initially, most drillholes were planned to reach 150m or until the geologist determined that mineralised zones had been adequately tested. In the end, 11 holes were drilled, with depths varying between 120m and 198m, totalling 1608m drilled. Drilling intersected only a very thin, unconsolidated surface cover (0-2 m), comprising quartz rubble and granitic feldspar fragments with moderate weathering. Beneath this, holes typically entered weathered granite before transitioning quickly into fresh granite at shallow depth. The dominant lithology is felsic granite of the Southwark Granite Suite, observed in nine of the eleven holes, with the two southernmost holes intersecting granodiorite. The granite is characterised by quartz, K-feldspar, plagioclase and biotite, with localised sericite alteration of plagioclase and mica minerals noted throughout several intervals. Drilling has confirmed a widespread, structurally controlled Sn-F-Cu hydrothermal system associated with the Southwark Granite Suite. All eleven drillholes intersected mineralisation, including tin-bearing greisen, quartz-fluorite veins, and sulphide-bearing quartz veins. High-grade tin results of up to 1,425 ppm Sn confirm a fertile greisen system, while fluorite mineralisation is pervasive across the project and locally very high grade, with values of up to 28.1% F, demonstrating a large and vertically extensive fluorine-rich hydrothermal footprint. Associated copper, zinc and bismuth anomalism further supports an evolved granite-related mineral system. Importantly, mineralised structures persist at depth and extend beyond areas of strong surface expression, highlighting potential for blind mineralisation. These results validate the geological model and strongly support systematic follow-up drilling aimed at delineating thicker and more continuous greisen development.