Resource Growth Hinges on Deep Extensions at Ironbark and Eaglehawk

Strong Drilling Momentum at Eaglehawk

Great Boulder Resources (ASX, GBR) has delivered a compelling update from its flagship Side Well Gold Project near Meekatharra, Western Australia. The company’s recent reverse circulation (RC) drilling campaign at the Eaglehawk deposit has returned a series of high-grade gold intersections, including a standout 6 metres at 121.07 grams per tonne (g/t) gold from 130 metres, featuring an extraordinary 2 metres at 342 g/t. These results reinforce Eaglehawk’s reputation as a high-grade target comparable to Great Boulder’s Mulga Bill deposit.

The 15-hole RC program, totaling over 3,100 metres, was designed to delineate mineralisation in sufficient detail to support the maiden Mineral Resource Estimate (MRE) for Eaglehawk. Highlights such as 28 metres at 3.80 g/t gold from 176 metres, including 11 metres at 7.32 g/t, and other robust intercepts confirm the deposit’s potential to add significant ounces to the project’s inventory.

Ironbark Extends High-Grade Gold Lode

Meanwhile, drilling at the Ironbark deposit has successfully tested the southern limits of a recently discovered high-grade gold lode, extending its strike by approximately 180 metres. Thirteen RC holes returned encouraging results, including 13 metres at 2.43 g/t gold from 121 metres, with a 7-metre section grading nearly 4 g/t. These findings suggest the near-surface southern extension is well-defined, though high-grade plunges may continue at depth beyond current drilling.

Advancing the Side Well Gold Project

Great Boulder’s Managing Director, Andrew Paterson, highlighted the busy exploration schedule, with ongoing RC drilling at Mulga Bill East and aircore (AC) drilling testing new regional targets. The company also secured $180,000 in funding from the Western Australian Government’s Exploration Incentive Scheme to support upcoming deep diamond drilling programs at Mulga Bill and Eaglehawk, expected to commence shortly.

Paterson emphasized the significance of the recent assay upgrades, particularly the re-assayed Eaglehawk hole 25EHRC003, which dramatically increased gold grades compared to initial composite samples. This bodes well for the quality and confidence of the forthcoming resource estimates.

Looking Ahead

With assay compilation underway from regional AC programs and geotechnical and metallurgical diamond drilling recently completed at Ironbark, Great Boulder is on track to deliver an updated Side Well MRE by the end of 2025. Additional heritage surveys and ongoing drilling at multiple prospects, including Flagpole, Saltbush, and Side Well South, promise a steady flow of news and potential resource growth in the months ahead.