Cauldron Energy has announced a second new uranium discovery this year at its Yanrey Uranium Project, with the Cosgrove prospect delivering a third consecutive 'hole-in-one' success. Meanwhile, drilling at Manyingee South continues to expand known mineralisation, underpinning plans for updated resource estimates in early 2026.
- Second new uranium discovery at Cosgrove prospect in 2025 drilling campaign
- Third consecutive 'hole-in-one' discovery at Yanrey with initial drill holes
- Manyingee South mineralisation extended further by recent drilling
- Updated Mineral Resource Estimates for Manyingee South and maiden MRE for Manyingee North planned for Q1 2026
- 2026 drilling campaign preparations underway targeting multiple high-priority prospects
A Hat-Trick of Discoveries
Cauldron Energy Limited (ASX, CXU) has capped off a highly successful 2025 exploration campaign at its Yanrey Uranium Project in Western Australia with a second new uranium discovery this year. The Cosgrove prospect, situated between the Bennet Well and Manyingee South deposits, was identified through airborne electromagnetic surveys and confirmed by wildcat drilling. Remarkably, Cosgrove marks Cauldron’s third consecutive 'hole-in-one' discovery, with each of Manyingee South, Manyingee North, and now Cosgrove being identified on the very first drill hole into each target.
Geological Significance and Mineralisation Potential
The Cosgrove prospect lies within a complex network of palaeochannels along an ancient Early Cretaceous coastline, a region known for hosting uranium mineralisation. Drilling intersected mineralised redox fronts within carbonaceous clays and sands of the Nanutarra Formation and oxidised sands of the overlying Birdrong Sandstone. These stratigraphic units are equivalent to those hosting mineralisation at Manyingee and Manyingee South, suggesting a consistent and extensive uranium system. Mineralisation at Cosgrove currently extends over 350 metres in width and remains open in multiple directions, indicating significant upside potential.
Expanding the Manyingee South Resource
Alongside the new discovery at Cosgrove, Cauldron has reported further drilling success at Manyingee South, extending mineralisation to the south, south-east, and south-west. The recent 12-hole program has pushed the known mineralised zone to over 4.4 kilometres in strike length and approximately 1 kilometre in width, with mineralisation still open at the limits of drilling. These results reinforce the prospect’s status as a significant uranium deposit within the Yanrey province.
Looking Ahead, Resource Updates and Future Drilling
Building on these successes, Cauldron plans to release an updated Mineral Resource Estimate (MRE) for Manyingee South and a maiden MRE for Manyingee North during the first quarter of 2026. The company is also preparing for an extensive 2026 drilling campaign aimed at testing numerous high-priority targets across the Yanrey project area. However, follow-up drilling at Cosgrove will be delayed until next year due to heritage and works approvals.
Strategic Implications
Cauldron’s CEO Jonathan Fisher highlighted the significance of these discoveries, emphasizing the company’s strategy to build a world-scale uranium resource inventory. The consistent 'hole-in-one' success rate underscores the robustness of Cauldron’s exploration methodology and the prolific nature of the Yanrey Uranium Province. With over 80 kilometres of prospective ancient coastline under tenure, the potential for further discoveries remains substantial, positioning Cauldron as a rising uranium player in Western Australia.
Bottom Line?
Cauldron’s trio of rapid discoveries at Yanrey signals a uranium exploration story to watch closely in 2026.
Questions in the middle?
- How will the updated Mineral Resource Estimates for Manyingee South and Manyingee North impact Cauldron’s valuation?
- What are the timelines and expected scale for the 2026 drilling campaign across Yanrey’s multiple prospects?
- How might heritage and regulatory approvals influence the pace of exploration and development at Cosgrove and other new discoveries?