Great Boulder Strikes 4434g/t Gold Deep at Side Well – What’s Next?
Great Boulder Resources has reported extraordinary high-grade gold intercepts at its Side Well Gold Project in WA, including a staggering 4434g/t assay at depth, signaling strong potential to expand its 1Moz resource base.
- 4434g/t gold intercept at 430m depth in Mulga Bill deposit
- New high-grade zones discovered 90m west of existing resource
- Current resource stands at 1.02 million ounces gold
- Multiple rigs active with $12 million cash backing drilling program
- Project located near established processing infrastructure
Spectacular Deep Drilling Results
Great Boulder Resources has delivered a remarkable update from its Side Well Gold Project in Western Australia, revealing assay results that include a jaw-dropping 4434 grams per tonne (g/t) gold intercept at approximately 430 metres below surface within the Mulga Bill deposit. This extraordinary grade, equivalent to 4.4 kilograms of gold per tonne of rock, was part of a 1.93-metre interval grading 574.39g/t Au, underscoring the presence of high-grade veins extending well beyond previously defined resources.
The Mulga Bill-Eaglehawk resource corridor currently spans 2.5 kilometres and holds a combined Mineral Resource Estimate (MRE) of 782,000 ounces of gold. The new deep drilling results suggest that the mineralisation continues at depth, potentially adding significant ounces to the existing inventory.
Expanding the Resource Footprint
In addition to the deep intercepts, drilling 90 metres west of the Mulga Bill resource has uncovered new high-grade gold zones, including assays of 48.3g/t Au over 0.74 metres and 11.7g/t Au over 0.54 metres. These discoveries are particularly noteworthy as the area has seen limited prior drilling, indicating untapped potential for resource growth.
Great Boulder is actively following up these zones with multiple rigs on site, including reverse circulation (RC), diamond, and air-core (AC) drilling programs. The company’s Managing Director, Andrew Paterson, highlighted the significance of these results, emphasizing the opportunity to grow the resource well beyond the current 1 million ounce mark.
Strategic Location and Strong Financial Position
The Side Well Project benefits from its proximity to existing processing plants within trucking distance, a strategic advantage that could accelerate development timelines and reduce capital expenditure. Great Boulder’s strong cash position of approximately $12 million as of March 2026 ensures the company is well-funded to continue its aggressive drilling and exploration programs.
The project’s location in the Murchison gold region, a prolific and well-established mining district, further enhances its appeal. The company is also progressing exploration at other prospects within the Side Well tenement package, including Ironbark, Golden Bracelet, Saltbush, and Flagpole, each contributing to the broader resource potential.
Looking Ahead
With assays from additional deep holes pending and follow-up drilling underway, Great Boulder is poised to refine and expand its resource model in the coming months. The company’s systematic approach, supported by government co-funding under the WA Exploration Incentive Scheme, positions it well to unlock further value from the Side Well Gold Project.
Investors and analysts will be watching closely for updated resource estimates and any indications of how these high-grade discoveries might translate into mine development and production plans.
Bottom Line?
Great Boulder’s exceptional high-grade results at Side Well set the stage for a potential resource upgrade that could reshape its growth trajectory.
Questions in the middle?
- How will the new high-grade intercepts impact the overall resource classification and mine plan?
- What is the timeline for updated resource estimates and potential feasibility studies?
- Could further drilling reveal additional high-grade zones beyond the current strike and depth limits?
