Brightstar Sandstone drilling: deeper Two Mile Hill envelope for mine planners
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
Brightstar Resources’ first diamond hole to exceed 1000m at the Two Mile Hill deposit has intersected over 500m of mineralised tonalite, materially enlarging the interpreted host intrusion at its 2.9Moz Sandstone gold project in Western Australia. The 1039.2m hole is one of two completed so far in a four-hole, ~3400m extensional drilling programme aimed at testing depth continuity and lateral extensions of the tonalite-hosted system. For geotechnical and mine planning teams, the thicker intrusive body suggests potential for a larger, deeper bulk underground mining envelope than previously modelled.
Technical Brief
- Two Mile Hill drilling is within the broader 2.9Moz Sandstone gold project in Western Australia.
Our Take
Multiple recent Sandstone pieces in our database – including the May 29 report of visible gold at Two Mile Hill – collectively point to Brightstar Resources building a case for an underground component beneath the existing 2.9Moz resource, which would change the project’s mine design and capital profile compared with a purely open-pit scenario.
The combination of deep extensional drilling at the Sandstone gold project and the July 10 Weir crushing-circuit contract for Brightstar’s Laverton processing plant suggests the company is trying to align resource growth with a defined processing route in Western Australia, reducing schedule risk once development decisions are made.
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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