105m at 2.41g/t Au Drilled at Eaglehawk Signals Resource Growth

Discovery of a New High-Grade Zone

Great Boulder Resources (ASX, GBR) has announced a breakthrough at its Eaglehawk deposit within the Side Well Gold Project in Western Australia. Recent reverse circulation drilling intersected a continuous 105 metres grading 2.41 grams per tonne gold starting from 95 metres depth. This includes impressive higher-grade intervals such as 3 metres at 18.85 g/t and 13 metres at 5.17 g/t, highlighting the potential scale and richness of this newly identified zone.

The discovery is particularly notable as it appears to be part of a structural 'link' zone, a cross-cutting fault or splay that controls high-grade mineralisation. This structural style is analogous to the high-grade link structures that underpin the bulk of gold ounces at Musgrave Minerals’ Break of Day deposit near Cue, a well-regarded high-grade resource in the region.

Implications for the Side Well Project

The Eaglehawk deposit currently lies outside Great Boulder’s existing global Mineral Resource Estimate (MRE) of 668,000 ounces at 2.8 g/t gold. The company plans to incorporate this new zone into an updated resource estimate scheduled for release in December 2025. This update is expected to reflect the growing scale and grade potential of the Side Well project, which already hosts multiple deposits including Mulga Bill, Ironbark, and Saltbush South.

Managing Director Andrew Paterson described the result as “extraordinary,” emphasizing the importance of this link structure as a new exploration target. The company is moving quickly to drill additional holes to confirm the extent, orientation, and thickness of the zone, with plans to optimise drilling angles and target similar structures elsewhere on the project.

Strategic Location and Exploration Pipeline

Side Well is strategically located in the northern Murchison region, adjacent to Westgold Resources’ Paddy’s Flat operation, benefiting from established infrastructure and a prolific gold mining district. The project’s current resource base is supported by ongoing extensional and infill drilling, with exploration targets suggesting potential to grow the resource towards the 940,000 to 1.1 million ounce range.

Great Boulder is aggressively advancing its exploration program, backed by a strong cash position of approximately $16 million and a technically experienced team. The discovery of the Eaglehawk link structure adds a compelling new dimension to the project’s growth story, potentially unlocking significant high-grade ounces that could materially enhance the project’s economics.

Looking Ahead

With assays pending for several holes and a diamond drill rig now on site, Great Boulder is well positioned to rapidly expand its understanding of Eaglehawk’s high-grade system. The upcoming resource update in December will be a key milestone, likely to attract renewed market attention and provide a clearer picture of the project’s value proposition.