Great Boulder Resources (ASX:GBR) has identified several large, new gold targets, via auger sampling, at the southern end of the Side Well Gold Project in Western Australia.
The auger assays defined high-tenor gold anomalies up to 1.8km long with gold values ranging from 5 parts per billion (ppb) to more than 1,000ppb gold.
Great Boulder, which has a market capitalisation of $53.89 million, says this level of gold anomalism is “unusually high” in the Meekatharra region. As such, the area has been partly cleared by a heritage survey earlier this month, with a second survey planned to clear the remaining targets during the June quarter.
Aircore drilling is now underway at Eaglehawk (formerly known as Mulga Bill North) with a program designed to define the target dacite host unit further north.
The dacite unit and associated contact zone is a key target for Mulga Bill-style high-grade, veinhosted gold mineralisation. Great Boulder notes that the presence of this unit at Eaglehawk was only recently recognised as a result of drilling in late 2024, leading to an improved focus with RC drilling in 2025.
Further aircore drilling is currently underway to test strike extensions to the dacite unit and associated mineralisation. This campaign includes some holes in the “gap” area between Mulga Bill and Eaglehawk, which remains poorly tested.
Follow-up drilling for Side Well South is being planned, with drilling to start once the necessary heritage clearance report is received. 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 at Eaglehawk and Mulga Bill.
Managing Director Andrew Paterson says the auger sampling program has led to discoveries at the Ironbark and Saltbush prospects, alongside recently at Side Well South.
“Our field team has now expanded the auger coverage right down to the south end of the project which has identified seven new targets,” Paterson says.
“The new targets include extensive, coherent anomalies up to 1.8km long that appear to be coincident with lithological boundaries and structural orientations. We are looking forward to moving the aircore rig into the area to see what can be unveiled at these new targets.
“In the meantime, the rig is busy at Eaglehawk defining the prospective dacite host unit further north of the recently announced significant drill intercept including 29m @ 4.79 grams per tonne gold and 8m @ 5.67g/t gold and we expect to have more aircore and reverse circulation assays to announce shortly.”
Once the necessary heritage clearance reports are received, a follow-up drilling program at Side Well South will take place.
Great Boulder is a mineral explorer focused on its portfolio of projects considered prospective for gold and base metals in Western Australia.
Write to Aaliyah Rogan at Mining.com.au
Images: Great Boulder Resources
