- 01Greenvale begins 950-line-km AEM survey at Thunderball.
- 02Survey aims to refine uranium targets and map paleochannels and structures.
- 03Results to guide 2027 drilling.
Greenvale Energy (ASX: GRV) has commenced a high-resolution airborne electromagnetic (AEM) survey across EL34157 in the southern part of its Thunderball uranium project in the Northern Territory.
The 950 line-kilometre survey is expected to provide significantly better resolution than existing regional electromagnetic coverage, enhancing the company’s ability to interpret prospective geological features and refine its exploration targeting.
The tenement-wide exercise will aim to identify and map features that may influence the location and concentration of uranium mineralisation around known prospects and project-level targets.
It will also endeavour to improve the definition of sub-surface paleochannel systems defined by earlier radiometric surveys, and map new structures and potential transport pathways for uranium-rich fluids.
A team from airborne survey specialist SkyTEM mobilised to the Thunderball project area at the end of October and is expected to commence flying operations this week, with work scheduled for completion this month and the results applied to the design of new drilling programs for the 2027 field season.
Pine Creek Oregon Location
EL34157 straddles the geological contacts between the Daly Basin, the Birrindudu Basin, and metasediments of the older Pine Creek Orogen (PCO), into which the Cullen Supersuite Granite has been intruded.
The south-western edge of the PCO, underlying the tenement, is orientated northwest-southeast with predominant cross-cutting fault structures orientated northeast-southwest such as the Hayes Creek Fault Zone, considered highly significant for local uranium mineralisation.
Greenvale has identified gaps in the historical geological understanding of the area, and the tighter line spacing of the new AEM survey is expected to enable enhanced mapping of stratigraphic thickness, regional depth-to-basement contacts, structural orientations, and palaeodrainage features at improved resolutions.
The company hopes to significantly enhance any small discrete anomalies from earlier AEM surveys, which can then be better correlated with existing datasets to produce refined and more focused drilling targets.
Thunderball Uranium Potential
Greenvale managing director Alex Cheeseman said the new survey represented another important step in systematically assessing the uranium potential at Thunderball.
“As the 2026 field season approaches its close, we are keen to complete this important airborne survey so the results can inform our regional geological modelling and further strengthen our drilling plans for the new season,” he said.
“This year we have applied multiple exploration techniques at Thunderball to systematically build the geological picture and progress it from broad greenfield exploration toward a pipeline of higher-confidence drill targets.”
“This work is critical and will position us for an expanded drilling campaign in 2027 to unlock the next generation of significant uranium discoveries in the Northern Territory [as] our field teams continue to build strong and constructive relationships with key stakeholders across the Thunderball project area, providing a solid platform for an expanded exploration effort next year.”
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