Great Boulder Resources (ASX:GBR) intends to grow the known resource at the Side Well Gold Project near Meekatharra in Western Australia by restarting drilling.
The asset currently holds a total resource of 16 million tonnes @ 2 grams per tonne for 1.02 million ounces, with 61% in the indicated category. Great Boulder says 90% of the total resource is suitable for open pit mining.
The Mulga Bill deposit is included in Side Well’s greater resource. Mulga Bill hosts a resource of 642,000 ounces gold including a grade component of 441,000 ounces @ 5.3g/t, as reported by Mining.com.au.
Great Boulder will continue deep diamond drilling at the Mulga Bill deposit, with three rigs operating across the greater project currently.
As reported by Mining.com.au, Great Boulder intersected visible gold in a brecciated quartz vein at Mulga Bill in December 2025, showing coarse visible gold from 503.5m.
Managing Director Andrew Paterson says Great Boulder has obtained “overwhelming evidence” to prove the asset’s resource is eligible for a substantial increase.
“The mineralisation is open in so many places and the under-explored nature of our project is highlighted by the spectacular course gold intersection recorded 250m below previous drilling at Mulga Bill late last year,” Paterson says.
“The more we grow the resource, the more value we create for our shareholders and the more options we have for future development scenarios.
“With gold continuing to reach new all-time highs and three mills in our area, Side Well is a fantastic project in one of the most exciting gold regions in Australia.”
Located in the Meekatharra gold field, the Side Well Gold Project is Great Boulder’s flagship project that neighbours Westgold Resources’ (ASX:WGX) Paddy’s Flat operation.
Great Boulder Resources is a mineral exploration company with gold and base metals assets in Western Australia.
Write to Maddison Elliott at Mining.com.au
Images: Great Boulder Resources
