Great Boulder Confirms New Gold Discoveries and Extends Eaglehawk Deposit by 200m

Exploration Update at Side Well South

Great Boulder Resources (ASX: GBR) has provided a comprehensive update on its exploration activities at the Side Well Gold Project, located near Meekatharra in Western Australia. The company has confirmed new gold discoveries at Side Well South through recent reverse circulation (RC) drilling, with notable intersections including 14 metres at 1.64 grams per tonne (g/t) gold from 83 metres and 19 metres at 0.84 g/t gold from 28 metres. These results build on earlier aircore (AC) drilling that first identified mineralisation in the area.

Assay results for an additional 16 RC holes are pending, indicating that the exploration program is still in its early stages but already showing promising signs of expanding the known gold mineralisation footprint.

Eaglehawk Deposit Extension

Alongside Side Well South, Great Boulder has extended the Eaglehawk deposit by approximately 200 metres to the south, with the mineralisation remaining open for further expansion. AC drilling at Eaglehawk returned significant results such as 8 metres at 2.19 g/t gold from 60 metres, including 4 metres at 4.23 g/t gold. These findings suggest that Eaglehawk continues to be a key growth area within the Side Well project.

The company is actively progressing follow-up drilling to further define the mineralisation and support an updated mineral resource estimate. Heritage clearances and induced polarisation geophysical surveys are also underway to delineate the broader mineralised corridor encompassing Eaglehawk and adjacent prospects.

Exploration Targets and Resource Potential

Great Boulder has formalised Exploration Targets across several prospects within the Side Well project, including Mulga Bill, Ironbark, Saltbush, and Side Well South itself. These targets are based on a combination of geological mapping, geochemical sampling, drilling data, and 3D modelling. The company estimates a global exploration target range of approximately 4.8 to 5.0 million tonnes at 1.8 to 2.9 g/t gold, equating to 272,000 to 465,000 ounces of gold, exclusive of the current Mineral Resource Estimate (MRE) of 668,000 ounces.

Importantly, these targets do not yet include several high-priority geochemical anomalies in the Tal Val area, which remain untested and could represent further upside. The company emphasises that these Exploration Targets are conceptual and not JORC-compliant resources, underscoring the need for continued drilling and evaluation.

Ironbark Scoping Study and Joint Ventures

The Ironbark deposit, part of the Side Well project, is progressing towards a scoping study expected to be delivered during the current quarter. Recent drilling has extended high-grade mineralisation southwards, suggesting potential for resource growth beyond the current estimate of 100,000 ounces.

Great Boulder is also advancing joint venture agreements with Zebina Minerals Pty Ltd, Wanbanna Pty Ltd, and Mark Selga, which will consolidate interests and streamline exploration efforts across the tenement package. These partnerships are expected to enhance the company’s capacity to accelerate exploration and development activities.

Looking Ahead

With ongoing drilling programs, pending assay results, and multiple exploration targets defined, Great Boulder is positioning itself for potential resource growth at Side Well. The company’s methodical approach, combining geological, geochemical, and geophysical data, supports a robust pipeline of opportunities. Investors and analysts will be watching closely for the results of the Ironbark scoping study and further drilling outcomes that could materially impact the project’s valuation.