Greenvale Energy Completes Airborne Geophysical Survey over Thunderball Uranium Project

Greenvale Energy (ASX: GRV) has completed an extensive airborne magnetics and radiometric (AMR) survey over its Thunderball uranium project in the Pine Creek region of the Northern Territory.

Conducted by contractor Thomson Airborne across 4,312-line kilometres at a close spacing of 100 metres, the survey sought to acquire new tenement-scale magnetic and radiometric data to in-fill previous surveys flown by multiple exploration companies since the 1950s on variable line spacings of up to 400m.

Survey lines were designed on an east-west line orientation believed to be optimal for mapping features of multiple strike directions and aimed to provide high resolution over pre-defined target areas.

Once processed, Greenvale expects the data to provide significantly improved geophysical data across all areas of the tenement, including the highly prospective Hayes Creek Fault Zone to the west and the contact of the Pine Creek Orogen and Birrindudu/Daly Basins on the eastern side.

Greenvale’s AMR survey followed Sentinel-2 multi-spectral data acquired in late-2025 which identified multiple helium-radon-uranium anomalies across Thunderball, with the radon and helium “clustered” around structural elements and known to be associated with uranium mineralisation transported along faults and fractures.

Second Airborne Survey

Greenvale is planning to run an airborne electromagnetic (AEM) survey over the contact of the highly prospective Pine Creek Orogen and Birrindudu/Daly Basins.

The survey will be co-funded by an exploration grant under the NT government’s geophysics and drilling collaboration program.

Aimed at boosting mining exploration in the territory, the program has so far awarded a record $4 million in support this year to 34 projects from 26 companies.

The AEM survey will use the SkyTEM system, which is reported to be useful in conducting regional exploration for multiple styles of uranium deposits and could significantly improve the resolution of geological features across Greenvale’s target areas.

Key Value Driver

Managing director Alex Cheeseman said the first survey of the new field season had been completed to plan.

“Getting teams in the field and progressing our exploration effort is a key value driver for Greenvale and it is great to see this survey completed safely and efficiently,” he said.

“The data obtained will fill a gap over [target area] EL34157 and, once processed, will give us a complete, high-resolution picture over the entire Thunderball project—an area that has traditionally seen a strong correlation between airborne geophysics and drilling results.”

“Field teams are being secured, and we will be on the ground again in short order, following up targets and progressing our significant pipeline of uranium exploration opportunities.”