Exploration Delays Loom as Greenvale Eyes Expansion at Oasis Amid Weather Risks

Exploration Breakthrough at Oasis

Greenvale Energy Limited (ASX:GRV) has announced a significant advancement in its exploration efforts at the Oasis Uranium Project in Queensland. Following the completion of a comprehensive trenching program in late 2025, the company has pinpointed multiple extensional drill targets that suggest substantial potential to expand the known mineralisation footprint.

The trenching program, which involved excavating six trenches spanning roughly 775 metres, was designed to map surface geochemical anomalies and structural features adjacent to the existing Oasis deposit. The results revealed three prominent anomalous zones: a central corridor aligning with the interpreted Oasis Shear, a northwest-southeast trending feature on the deposit’s western flank, and a broadly north-south trending anomaly extending northward from the main shear zone.

Geological Insights and Structural Confirmation

Geological mapping confirmed that uranium mineralisation is hosted within chlorite-biotite schists and at contacts with K-feldspar-rich granites and mafic intrusives. Notably, the highest-grade anomalies appear concentrated within a biotite-rich mylonite zone, reinforcing the model of an intrusive-related mineral system within the Lynd Mylonite Zone. These findings provide a consistent link between surface expressions and deeper mineralised zones, which is critical for guiding future drilling campaigns.

Greenvale’s CEO, Alex Cheeseman, emphasised the value of the trenching results, stating that the program has “greatly increased our confidence” in the potential for resource growth through targeted step-out drilling. The trenching has effectively delineated high-confidence drill targets that correlate well with both structural interpretations and geochemical data.

Next Steps and Exploration Outlook

Looking ahead, Greenvale plans to commence fieldwork in April 2026, subject to weather and access conditions in Northern Queensland. The initial focus will be on ground-truthing the identified anomalies through detailed mapping and sampling, potentially followed by soil sampling and further trenching. Step-out drilling at the Oasis deposit is anticipated to run concurrently with testing of key regional targets, aiming to build on the geological understanding gained from the 2025 program.

The company is also actively engaging with local stakeholders to ensure smooth progress of exploration activities. While the southern extension of the Oasis deposit remains structurally complex and less defined, alternative investigation methods may be employed to explore this area without impacting sensitive drainage systems.

Overall, the trenching program represents a cost-effective and rapid approach to refining exploration targets, setting the stage for what could be a transformative phase in Greenvale’s uranium exploration strategy.