Great Boulder Resources' latest drilling at Side Well extends high-grade gold mineralisation beyond the current 1Moz resource, confirming a continuous system over 2.5km between Mulga Bill and Eaglehawk deposits.
- High-grade gold assays extend resource boundaries
- Continuity confirmed between Mulga Bill and Eaglehawk deposits
- Potential for a single large open pit over 2.5km
- Ongoing multi-rig drilling at Side Well
- Peak Hill drilling planned post-acquisition
Drilling Unveils Continuous High-Grade Gold Corridor
Great Boulder Resources (ASX:GBR) has delivered compelling evidence that its Side Well Gold Project near Meekatharra is shaping up as a contiguous high-grade gold system stretching over 2.5 kilometres. Recent drilling results reveal significant mineralisation bridging the previously separate Mulga Bill and Eaglehawk deposits, a development that could transform mining plans by enabling a single large-scale open pit operation.
Among the standout assays are 21 metres at 7.24 g/t Au from 99 metres and a remarkable 0.45 metres at 165 g/t Au from 454.5 metres, underscoring the project's high-grade potential. These results come as Great Boulder continues to aggressively drill multiple corridors, including the gap between Mulga Bill and Eaglehawk, where gold continuity has now been confirmed.
Potential for Resource Growth Between Mulga Bill and Mulga Bill East
Drilling has also extended mineralisation between the main Mulga Bill corridor and Mulga Bill East, a zone with limited prior exploration. The discovery of west-dipping high-grade veins crossing this area suggests immediate opportunities to add ounces adjacent to established resources. This complements earlier deep drilling that found ultra-high-grade intercepts such as 1.93 metres at 574 g/t Au, indicating the deposit remains open in all directions.
Great Boulder’s Managing Director Andrew Paterson emphasised the strategic significance of these findings, noting the potential to rapidly grow the Side Well resource beyond its current 1 million ounce base. The company is maintaining momentum with ongoing reverse circulation (RC) and aircore (AC) drilling programs targeting both extensional and regional targets.
Flagpole and Golden Bracelet Show Encouraging Extensions
Further afield within the Side Well project, drilling at the Flagpole deposit has extended the maiden resource by approximately 150 metres to the north, with mineralisation remaining open along strike and at depth. Highlights include 7 metres at 2.87 g/t Au. Meanwhile, reconnaissance drilling at Golden Bracelet has intersected gold mineralisation up to 9 metres at 1.09 g/t Au, with deeper high-grade zones identified, signaling further exploration upside.
Peak Hill Acquisition and Upcoming Drilling Campaign
Great Boulder is also advancing plans to commence a substantial drilling campaign at its recently acquired Peak Hill Gold Project, contingent on completion and final approvals. This campaign is expected to involve 40,000 metres of drilling within the first six months, complementing the ongoing work at Side Well. The acquisition, funded by a recent $40 million placement, adds nearly half a million ounces in resources and is poised to accelerate Great Boulder’s production pathway.
These developments build on a series of high-impact results earlier this year, including the extraordinary 1.93 metres at 574 g/t Au intercept, which helped solidify Side Well’s status as a premier high-grade gold project in the Murchison region. The continuity between deposits and the resource extensions reinforce the potential for a large-scale mining operation that could reshape the project's economics and timeline.
With drilling ongoing and several assays pending, investors will be watching how these results translate into updated resource models and feasibility studies. The confirmation of mineralisation continuity between Mulga Bill and Eaglehawk, in particular, raises questions about the scale and configuration of future mining operations, and how quickly Great Boulder can capitalise on this expanded footprint.
Meanwhile, the planned Peak Hill drilling campaign represents a critical next step in Great Boulder’s growth story, with the potential to add significant ounces and enhance the company’s asset base in Western Australia.
As Great Boulder pushes forward, the mining sector will be keen to see if these promising drill results can be converted into a robust, economically viable resource that supports long-term production.
Investors should also note that while the Side Well resource remains open in multiple directions, and the Peak Hill acquisition is underway, drilling results and approvals will be key catalysts to watch in the coming months.
These findings follow Great Boulder’s recent $40 million placement which secured funding for the Peak Hill acquisition and expanded drilling ambitions, as well as the ultra-high-grade intercepts reported earlier this year that highlighted the project’s deep potential.
Bottom Line?
Side Well’s expanding high-grade corridor hints at a mining scale shift, but ongoing drilling and Peak Hill’s acquisition remain pivotal to Great Boulder’s near-term trajectory.
Questions in the middle?
- How will confirmed continuity between Mulga Bill and Eaglehawk affect mine planning and scale?
- What impact will the Peak Hill acquisition have on Great Boulder’s resource base and production timeline?
- Can ongoing drilling sustain the pace of resource growth and convert exploration success into economic reserves?