Koba Resources Uncovers New High-Grade Uranium Zone at Yarramba

New High-Grade Uranium Discovery at Yarramba

Koba Resources has announced a significant breakthrough at its Yarramba Uranium Project in South Australia, revealing a new high-grade uranium prospect named Delord. The discovery comes from a recent follow-up drilling campaign completed in September 2025, which returned impressive uranium grades exceeding 1,000ppm eU3O8. This adds to the growing list of promising targets within the expansive 5,000 square kilometre project area.

Drilling Highlights and Geological Insights

The Delord Prospect, situated in a 1.5-kilometre corridor between the established Oban Deposit and Berber Prospect, yielded notable intercepts such as 1.07 metres at 693ppm eU3O8, including a high-grade segment of 0.53 metres at 1,045ppm eU3O8. Similarly, the Chivas Prospect delivered thick zones of uranium mineralisation, with intercepts like 1.52 metres at 482ppm eU3O8, including 0.52 metres at 1,071ppm eU3O8. These results underscore the continuity and potential scale of uranium mineralisation across multiple targets.

Importantly, the identification of a roll-front signature at Delord provides valuable geological context. This feature, characterized by a distinctive uranium concentration pattern, enhances the precision of future drill targeting and reflects the dynamic mineralisation processes within the palaeochannels. Such insights are crucial for refining exploration strategies and maximising resource discovery.

Expansive Potential Across Underexplored Palaeochannels

The Yarramba Project encompasses over 250 kilometres of interpreted palaeochannels, geological formations known to host uranium deposits. Koba’s ongoing exploration success within these largely underexplored channels suggests substantial upside potential. The recent drilling campaign, comprising 18 holes totaling 1,818 metres, has not only confirmed high-grade mineralisation at multiple prospects but also demonstrated that the mineralisation remains open along strike, inviting further investigation.

Strategic Next Steps and Market Implications

Building on these encouraging results, Koba Resources is advancing plans for a follow-up drilling program expected to commence in the coming months. This program aims to test the strike extensions of the Delord Prospect and continue exploration along the corridors linking Oban with Berber and Chivas. The company is also leveraging new geological models to reassess historical data, enhancing the targeting of roll-front signatures and potentially accelerating resource delineation.

While the current uranium grades are derived from downhole gamma logging rather than laboratory assays, the consistency of results across multiple prospects bolsters confidence in the project’s quality. Investors and analysts will be watching closely as Koba moves to validate these findings and expand its resource base, which could have meaningful implications for the company’s valuation and positioning within the uranium sector.