Great Boulder’s 39.9g/t hit at Peak Hill: pit design and scheduling notes for engineers
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
Great Boulder Resources has reported a standout intercept of 8m at 39.9g/t gold from 58m depth at the Golden Treasure prospect within its Peak Hill project in Western Australia. Recent drilling has confirmed mineralisation continuity between the Jubilee and Golden Treasure deposits, tightening geological controls ahead of a major resource update. The result, the strongest drill hit on the project to date, suggests potential for higher-grade zones at relatively shallow depths, with implications for future open-pit design and early-stage mine scheduling.
Technical Brief
- Mineralisation continuity has now been drill‑tested specifically between the Jubilee and Golden Treasure deposits.
Our Take
The standout 39.9g/t over 8m at Golden Treasure comes only months after Great Boulder paid $54.4 million for Peak Hill from Westgold, so this kind of shallow, high-grade intercept materially de-risks that acquisition from an exploration upside standpoint.
In our database, Great Boulder’s recent work at Mulga Bill East (Side Well project near Meekatharra) already shows it building a pipeline of Western Australian gold targets, and Peak Hill now adds a more advanced asset that could be fast-tracked if further drilling confirms continuity around Jubilee and Golden Treasure.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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