Brightstar Sandstone intercept: bulk underground potential for mine planners
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Brightstar Resources has reported a 305.4m gold intercept grading 1.82g/t from 351.9m depth in hole TMHRCD26020 at the Two Mile Hill–Shillington deposit, Sandstone project, Western Australia, indicating a mineralised intrusion roughly three times wider than previous models. The intercept is unconstrained at depth, suggesting continuity beyond the current 657.3m end-of-hole and potential for a large-tonnage, bulk underground target rather than narrow-vein stoping. For resource modellers and mine planners, the result may justify revising intrusion geometry, tonnage estimates and potential underground development scenarios.
Technical Brief
- Hole ID TMHRCD26020 is part of Brightstar’s deep drilling programme at Two Mile Hill–Shillington.
- Mineralisation occurs within an intrusive body, implying bulk-tonnage rather than narrow shear-hosted lode geometry.
- Intercept is described as “unconstrained”, indicating mineralisation persists beyond the current end-of-hole depth.
Our Take
The deep 305.4 m intercept at Two Mile Hill–Shillington aligns with earlier May 2026 drilling that showed visible gold at Sandstone, strengthening the case flagged there for transitioning from open pit to a sizeable underground operation in Western Australia.
With Brightstar Resources already committing to a 1.5 Mt/y Laverton processing plant at the Goldfields project (final investment decision in late May 2026), any step-change in underground ounces at Sandstone could materially improve plant utilisation options and regional scheduling flexibility for gold feed.
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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