Side Well South Drilling Yields Up to 24m at 2.75g/t Gold Ahead of Resource Estimate

Strong Drilling Results at Side Well South

Great Boulder Resources (ASX – GBR) has unveiled promising assay results from 21 reverse circulation (RC) drill holes at its Side Well South prospect, located near Meekatharra in Western Australia. The company reported wide zones of gold mineralisation starting from shallow depths, with standout intercepts including 24 metres at 2.75 grams per tonne (g/t) gold and 8 metres at 3.88 g/t gold. These results reinforce the prospect’s potential as a significant contributor to the Side Well Gold Project’s resource base.

Managing Director Andrew Paterson highlighted that the drilling has delineated two parallel gold lodes extending approximately 300 and 400 metres respectively. Both lodes remain open along strike and at depth, suggesting further upside potential. The mineralisation style closely resembles other successful discoveries in the region, such as Ironbark and Saltbush, which bodes well for continuity and resource growth.

Advancing Toward a Maiden Resource Estimate

With only a handful of additional drill holes required, Great Boulder is nearing the completion of sufficient geological data to define an initial Mineral Resource Estimate (MRE) for Side Well South. This milestone is expected to add meaningful ounces to the existing 668,000-ounce resource at Side Well, which currently includes deposits like Mulga Bill, Eaglehawk, Ironbark, and Saltbush.

The company’s exploration team is simultaneously progressing drilling at multiple deposits within the project, with assays pending from recent programs at Ironbark and ongoing work at Eaglehawk and Side Well South. The upcoming resource update will integrate data from five deposits, providing a comprehensive view of the project’s scale and grade profile.

Broader Exploration and Future Plans

Beyond Side Well South, Great Boulder continues to accelerate exploration across the broader Side Well Project area. Recent reconnaissance drilling has completed 119 air-core holes, with assay results expected shortly. The company is also conducting diamond drilling at Ironbark to gather geotechnical and metallurgical data, essential for advancing towards development.

Looking ahead, Great Boulder plans to test deeper extensions beneath the Mulga Bill and Eaglehawk deposits in the final quarter of 2025, aiming to unlock further resource growth at depth. The company’s strategic focus on methodical, multi-target drilling campaigns underscores its commitment to building a robust, high-grade gold inventory in a prolific mining region.

Context Within the Murchison Gold Field

Side Well lies within the Murchison gold field, a well-known and historically productive region in Western Australia. The project’s geology features tightly folded greenstone belts with steeply dipping mineralised lodes concealed beneath alluvial cover. Great Boulder’s systematic exploration approach, combining geochemical targeting and modern drilling techniques, is unlocking new discoveries in this relatively underexplored area.

As the company moves closer to finalising its maiden resource for Side Well South, investors and industry watchers will be keenly observing how these thick, high-grade intersections translate into a commercially viable gold resource.