Reverse circulation drilling is ongoing at Great Boulder Resources’ (ASX:GBR) Mulga Bill (now named Eaglehawk) project with follow-up drilling imminent at Eaglehawk.
The rig will then switch to aircore drilling to start a program defining the northern extension of the contact-related dacite target. Follow-up drilling for Side Well South is also being planned, with drilling to begin once the necessary heritage clearance report is received.
In an update on exploration drilling at priority targets within the company’s flagship Side Well Gold Project near Meekatharra in Western Australia – which hosts a mineral resource estimate (MRE) of 668,000 ounces @ 2.8 grams per tonne gold – Managing Director Andrew Paterson says it’s appropriate to rename Mulga Bill North to Eaglehawk to distinguish it as a large “high-grade” target in its own right.
Assays are pending for 22 aircore holes drilled across targets to the northwest of Saltbush in February as well as 16 reverse circulation holes completed to date.
A reverse circulation drilling program at the newly named Eaglehawk prospect intersected thick gold with a result of 29m @ 4.79 grams per tonne gold from 76m, including 4m @ 20.5g/t gold from 92m.
Great Boulder, which has a market capitalisation of $53.13 million, says this result is the highest grade gold intercept ever drilled at the prospect and also confirms its strategy in targeting contact related high-grade gold veins.
Paterson says if these findings continue, Eaglehawk has potential to have a “meaningful” impact on the company’s resource growth ambitions.
“Drilling has defined gold mineralisation over more than 900m of strike, and it remains open to the north where there is little or no drilling over a strike length of approximately 4km,” he says.
“This target represents a significant area of highly prospective geology that has never been effectively tested.”
Meanwhile, at the Side Well South prospect, all assays have been received from the remaining 62 aircore holes drilled in February 2025.
Paterson says a follow-up heritage survey over the areas with defined new gold intersected was completed last week and will be followed up with drilling in due course.
Some 11 reverse holes were drilled at Eaglehawk (previously referred to as the Mulga Bill North prospect) targeting high-grade gold mineralisation along the contact between dacite and the surrounding andesitic volcaniclastics.
Much of the previous drilling in this area was too far west to intersect the target. The company says it is pleased that results from this latest drilling have defined wide, “high-grade, vein-hosted gold mineralisation within the targeted dacite contact”.
With assay results only received for the first two reverse circulation holes, the company awaits the return of the remaining nine holes.
Assays remain pending for 22 aircore holes drilled across targets to the northwest of the Saltbush prospect in February, as well as 16 reverse circulation holes completed at Eaglehawk and Mulga Bill.
The company’s flagship Side Well Gold Project, located near Meekatharra, contains a resource of 668,000 ounces of gold @ 2.8g/t gold.
Write to Aaliyah Rogan at Mining.com.au
Images: Great Boulder Resources
