Great Boulder Strikes Up to 41.4g/t Gold Beyond Ironbark Resource Edge

Extending the Ironbark Gold Deposit

Great Boulder Resources (ASX, GBR) has announced compelling new assay results from its ongoing RC drilling program at the Ironbark prospect, part of the Side Well Gold Project near Meekatharra, Western Australia. The recent drilling has intersected 8 metres grading 8.57 grams per tonne (g/t) gold starting at 92 metres depth, including a high-grade 3-metre section at 19.57 g/t gold. Notably, assays from one interval reached an exceptional 41.4 g/t gold, located 25 metres south of the previously defined resource boundary.

This discovery extends the known mineralisation by at least 85 metres to the south, beyond the current Mineral Resource Estimate (MRE) of 100,000 ounces at 3.3 g/t gold. The results build on earlier high-grade intersections announced in May, reinforcing the prospect’s potential for a significant resource upgrade.

Strategic Implications for Side Well

Ironbark’s simple tabular orebody geometry combined with high grades and near-surface mineralisation in the northern section offers Great Boulder an attractive opportunity for early-stage cash flow generation. Managing Director Andrew Paterson highlighted the methodical step-out drilling approach aimed at extending the deposit further south and at depth, with additional assay results pending from several holes drilled in the current campaign.

Alongside exploration, Great Boulder is advancing its development strategy with mining agreement negotiations progressing well. The company expects to commence prerequisite fieldwork for mining approvals imminently, setting the stage for the forthcoming Ironbark scoping study. This study will provide critical insights into the project’s economic viability and development pathway.

Broader Exploration and Project Context

The Side Well Gold Project hosts a substantial Mineral Resource of approximately 668,000 ounces at 2.8 g/t gold, with Ironbark representing a key high-grade component. The project benefits from its strategic location within the prolific Murchison gold field, surrounded by established mining and civil infrastructure. Great Boulder’s exploration team continues to test multiple prospects within the tenement package, with assay results from recent aircore programs at Side Well South and Saltbush expected soon.

With a strong technical team and a portfolio of prospective gold and base metal assets, Great Boulder is well positioned to capitalize on ongoing exploration success. The company’s disciplined approach to drilling and resource definition aims to steadily build value while progressing towards development milestones.