Gold Hits 19.3g/t and Antimony 4.12% in Thunderbird’s NSW Rockvale and Kookabookra Sampling

Initial Exploration Success

Thunderbird Resources Limited (ASX: THB) has reported promising early results from its maiden exploration program at the Rockvale and Kookabookra Gold-Antimony Projects in northeastern New South Wales. The company’s first-pass rock chip sampling has confirmed the presence of high-grade gold, antimony, and silver mineralisation, validating historical data and underscoring the projects’ potential.

At Kookabookra, assays from rock chip and grab samples returned gold grades as high as 19.3 grams per tonne (g/t), with several samples exceeding 8 g/t. These results come from historical workings such as British Lion Reef and Welcome Stranger, where quartz veins within granitic host rocks appear to control mineralisation.

Rockvale’s Antimony and Silver Highlights

The Rockvale Project, situated adjacent to Larvotto Resources’ Hillgrove Antimony-Gold Project, yielded antimony assays up to 4.12% and silver concentrations reaching 200 grams per tonne at the Achill prospect. Mineralisation here is associated with quartz veins and breccias within metamudstone and siltstone, with disseminated stibnite observed. The zone extends over approximately 130 metres and remains open along strike, suggesting further potential.

Additional sampling at the Taits Gully prospect returned silver grades up to 110 g/t and gold up to 1.76 g/t, hosted within an east-west fault zone. These findings reinforce the geological complexity and mineral potential of the Rockvale tenure.

Next Steps in Exploration

Thunderbird has completed a soil sampling program at Kookabookra aimed at refining drill targets, with results expected within six weeks. The company is also considering an Induced Polarisation (IP) geophysical survey to detect sulphide mineralisation at depth, especially in areas where soil geochemistry may be less effective due to transported cover.

At Rockvale, detailed geological mapping and soil sampling are planned to better define the Achill prospect’s extent and prepare for drilling. The company is actively negotiating further land access agreements to broaden exploration across both projects.

Strategic Positioning and Market Context

Thunderbird’s projects lie within a recognised exploration hotspot, close to established deposits such as Hillgrove and Enmore. Executive Chairman George Ventouras highlighted the strategic advantage of this location and the largely untested nature of the ground, which offers considerable discovery potential. With gold, antimony, and silver markets maintaining positive investor sentiment, Thunderbird aims to advance its exploration systematically toward drilling in the third quarter of 2025.

While the initial sampling is selective and reconnaissance in nature, the results provide a solid foundation for the company’s next phase of exploration. The confirmation of high-grade mineralisation in multiple commodities across two projects enhances Thunderbird’s profile in the critical minerals space, essential for the global energy transition.