Great Boulder Resources Ltd has intersected high-grade gold mineralization in its 40,000-metre drilling campaign at the Peak Hill Gold Project in Western Australia, highlighted by an intercept of 12m at 8.56g/t Au from 8m in hole GJRC045 at the Golden Treasure prospect.

The drill program has returned multiple high-grade intervals extending known mineralization outside the existing resource base. At Golden Treasure, hole GJRC036 intersected 8m at 9.00g/t Au from 76m, including 1m at 13.15g/t Au from 111m. Two diamond holes completed at the target indicate structural complexity with multiple vein orientations and visible gold in adjacent shears.

Drilling at the Durack deposit defined high-grade mineralisation over more than 300 metres of strike with a northerly plunge that remains open. Highlights include hole GDRC030, which returned 20m at 2.73g/t Au from 90m and 10m at 9.18g/t Au from 137m, alongside hole GDRC027 returning 13m at 1.96g/t Au from 91m and 8m at 5.67g/t Au from 148m. Three diamond holes were also drilled at Durack to obtain structural and assay data.

First-round results from Enigma returned significant gold intersections across moderately dipping shears hosted within Narracoota volcanics, including hole GERC005 with 3m at 5.91g/t Au from 72m and 13m at 1.15g/t Au from 109m, and hole GERC021 with 6m at 2.89g/t Au from 90m. Three rigs remain active on site, with Phase 1 programs underway at Enigma and Five Ways before rigs return to Jubilee and Durack for Phase 2 drilling. First assays from Five Ways are expected shortly.

“We continue to generate outstanding high-grade drilling results extending the known mineralisation in several places at Peak Hill. This supports our plan to grow the 481,000oz resource substantially in preparation for production and cashflow under our ore purchase agreement with our largest shareholder, Westgold.”

— Andrew Paterson, Managing Director

Great Boulder acquired 100% of the Peak Hill Gold Project from Westgold Resources in July 2026, adding an historic production centre with past production exceeding 900,000 ounces of gold and seven granted mining leases. The acquisition followed a $40 million capital raising completed in May 2026 via a two-tranche placement priced at 8.5 cents per share to fund exploration across Peak Hill.

The company is utilizing the ongoing drilling campaign to deliver a major resource upgrade for Peak Hill by the end of 2026.

Read the full announcement: High grades continue at Peak Hill