105 Drill Holes Reveal Up to 11m Thick Uranium Zones Near Tumas Project

Exploration Breakthrough at Tinkas

Deep Yellow Limited has announced encouraging results from its recent exploration drilling at the Tinkas prospect, situated within Exclusive Prospecting Licence 3496 in Namibia’s Erongo Region. This new prospect lies adjacent to the company’s flagship Tumas Project, a significant uranium resource on Mining Licence 237. The Reverse Circulation (RC) drilling program, conducted between late September and mid-October 2025, comprised 105 holes totaling 1,137 metres.

The drilling targeted an airborne radiometric anomaly coinciding with palaeochannels; ancient riverbeds known to host uranium mineralisation. The program successfully confirmed the presence of a shallow palaeochannel filled with calcretised sediments, which are fertile for uranium mineralisation. Notably, mineralised zones averaged 2.9 metres in thickness, with some intervals reaching up to 11 metres, starting as close as one metre below the surface.

Significant Mineralisation Intercepts

The uranium grades reported are compelling, with an average of approximately 260 ppm eU3O8. Some of the standout intersections include 11 metres at 777 ppm from 1 metre depth and 2 metres at 1,273 ppm from 11 metres depth. These results underscore the prospect’s potential to contribute meaningfully to Deep Yellow’s resource base, although the company currently considers the exploration target at Tinkas to be relatively small.

The drilling methodology employed industry-standard practices, including calibrated downhole gamma logging and confirmatory portable XRF assays. The data quality and sampling techniques have been independently reviewed and deemed robust, providing confidence in the reported results.

Strategic Implications and Next Steps

While the Tinkas prospect is still in the early stages of exploration, its proximity to the established Tumas Project offers strategic value. The thick, shallow mineralisation could potentially be integrated into the existing resource framework, enhancing Deep Yellow’s growth trajectory in uranium production. The company plans further drilling to delineate the edges of the mineralisation and better define the resource potential.

This development comes at a time when nuclear energy is gaining renewed attention as a critical component of the global transition to low-carbon power. Deep Yellow’s dual-pillar growth strategy, combining advanced projects in Namibia and Australia, positions it well to meet rising uranium demand.