Greenvale Energy’s latest drilling and trenching at the Oasis Uranium Project confirm high-grade uranium continuity and reveal a potential second mineralised structure, expanding exploration horizons.
- High-grade uranium assays confirm mineralisation continuity along strike and down-dip
- Trenching program discovers potential second northeast-trending mineralised structure
- Six of nine trenches completed with samples sent for independent chemical analysis
- Final assays from six drill holes pending, expected by end of November 2025
- Expanded geological model supports broader regional exploration plans
Exploration Advances at Oasis
Greenvale Energy Limited (ASX:GRV) has delivered encouraging results from its ongoing exploration at the Oasis Uranium Project in Queensland. Recent chemical assays from four diamond drill holes have confirmed the continuity of high-grade uranium mineralisation both along strike and down-dip of the main mineralised shear zone. These findings reinforce the geological model underpinning the deposit and highlight the potential for resource expansion.
Complementing the drilling, a trenching program initiated in late October 2025 has progressed well, with six trenches completed out of an originally planned nine. The flexible trench excavation strategy allowed Greenvale to optimise sampling locations, leading to the discovery of a potential second mineralised structure trending northeast. This new structural insight aligns with recent ground magnetics data and could represent a fault splay associated with the main Oasis Shear.
Significant Assay Highlights
Among the standout assay results, drill-hole 25GRV003 returned 5.50 meters at 722 parts per million (ppm) U3O8 starting from 279 meters depth, including a 2-meter interval grading 1,189 ppm U3O8. Drill-hole 25GRV004 intersected 3.75 meters at 1,001 ppm U3O8 from 76.25 meters, featuring a 1-meter section with an impressive 2,424 ppm U3O8. Meanwhile, 25GRV006 delivered 3.50 meters at 355 ppm U3O8 from 88 meters, including 2 meters at 592 ppm U3O8. These results confirm the deposit’s high-grade nature and continuity, critical for advancing resource estimation.
Drilling also revealed that mineralisation is hosted in structurally controlled zones involving deformed granite intrusives and metamorphics, with mafic dykes playing a role in mobilising uranium-rich fluids. This nuanced geological understanding is vital for targeting future exploration and potential resource growth.
Implications for Regional Exploration
Greenvale’s CEO, Alex Cheeseman, emphasised the significance of integrating multiple exploration techniques to build a comprehensive picture of the Oasis deposit. The trenching results, particularly the indication of a second mineralised structure, suggest that the Oasis Shear system may host multiple uranium-bearing zones. This insight opens the door to expanded regional exploration within the 90 square kilometre tenement, potentially leading to the discovery of additional deposits with similar characteristics.
The company plans to complete the trenching program by mid-November and expects assay results from trench samples within 6-8 weeks thereafter. Final chemical assays from the remaining six drill holes are anticipated by the end of November. These data will inform the next phase of drilling and exploration, with a focus on both the Oasis deposit and surrounding regional targets.
Looking Ahead
Greenvale’s methodical approach; combining diamond drilling, trenching, geophysical surveys, and detailed geological modelling; positions the company well to unlock the full potential of the Oasis Uranium Project. As the company moves toward defining new drill targets and expanding its exploration footprint, investors and analysts will be watching closely for the upcoming assay results and the implications for resource scale and project economics.
Bottom Line?
Greenvale’s evolving geological model and discovery of a new mineralised structure at Oasis set the stage for a potentially transformative uranium exploration campaign.
Questions in the middle?
- Will the pending assays confirm further high-grade mineralisation and extend the known deposit?
- How significant is the newly identified northeast-trending mineralised structure in terms of resource potential?
- What are the timelines and targets for regional exploration beyond the current Oasis deposit?