Eaglehawk Drilling Yields 8m at 29.18g/t and 4m at 54.80g/t Gold

• Multiple high-grade gold intersections at Eaglehawk outside current lode interpretations
• Notable 8m @ 29.18g/t Au and 4m @ 54.80g/t Au in hole 25EHRC003
• Ironbark drilling reveals thicker, higher-grade mineralisation at depth
• Ongoing RC drilling at Side Well South to define new mineralisation
• Plans to accelerate exploration with additional rigs through 2025 and into 2026

Exploration Breakthrough at Eaglehawk

Great Boulder Resources (ASX – GBR) has delivered a compelling update from its flagship Side Well Gold Project near Meekatharra, Western Australia. Recent resource definition drilling at the Eaglehawk deposit has intersected multiple high-grade gold zones beyond the previously understood lode boundaries. The standout result comes from hole 25EHRC003, which returned four distinct high-grade intervals including an 8-metre section grading an extraordinary 29.18 grams per tonne (g/t) gold, highlighted by a 4-metre segment at 54.80 g/t.

These intersections suggest the presence of two or three new west-dipping high-grade veins and possibly a thicker subvertical zone, expanding the geological complexity and potential of the Eaglehawk system. The mineralisation lies outside the previously targeted dacite lithology, indicating new exploration vectors for the company.

Ironbark Delivers Encouraging Depth Extensions

Complementing the Eaglehawk success, infill drilling at the Ironbark deposit has yielded grades surpassing the current resource model. Hole 25IBWR004 intersected 9 metres at 4.97 g/t gold, including a remarkable 1 metre at 33.40 g/t near the bottom of the existing resource. This thicker and higher-grade mineralisation at depth offers promising scope for extending the resource beyond the current pit design, potentially enhancing the project’s economic profile.

Ongoing Drilling and Future Plans

Great Boulder is actively advancing its exploration program with 27 reverse circulation (RC) holes completed at Eaglehawk, with assays pending for 17 holes. Concurrently, drilling is underway at Side Well South to define newly discovered gold mineralisation north of the historic Golden Bracelet area. The arrival of a second rig by the end of August is expected to accelerate resource growth and discovery efforts through the remainder of 2025 and into 2026.

Managing Director Andrew Paterson expressed enthusiasm about the results, noting the "fantastic intersections" and the potential for further high-grade surprises. He highlighted the need for additional drilling to confirm the orientation and extent of these new zones, underscoring the dynamic nature of the project’s geology.

Strategic Positioning and Resource Base

The Side Well Gold Project currently hosts a Mineral Resource Estimate of 668,000 ounces at 2.8 g/t gold, with Great Boulder focused on expanding this base through systematic exploration. The project benefits from proximity to established mining infrastructure and a strong technical team, positioning it well for future development. The recent drilling results reinforce the potential for resource growth and underpin ongoing technical studies required for mining approvals.

As Great Boulder continues to unlock new high-grade zones and refine its geological models, the market will be watching closely for updated resource estimates and feasibility studies that could pave the way for project advancement.

Bottom Line?

Great Boulder’s latest drilling success at Side Well signals a promising phase of resource expansion and exploration momentum.

Questions in the middle?

• What will the upcoming assay results from the remaining Eaglehawk holes reveal about the deposit’s scale?
• How will the new high-grade zones impact the next Mineral Resource Estimate and project economics?
• What exploration targets will the second rig focus on to accelerate discovery at Side Well?