Brightstar’s 751 g/t gold hit at Sandstone: design and stope notes for mine planners
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Brightstar Resources has reported a record intercept at its Sandstone gold project in Western Australia, with one metre at 751g/t gold within a broader 7m interval grading 119g/t from 199m depth in reverse-circulation hole BORC26036 at the Bull Oak deposit. The ultra-high-grade shoot at ~200m vertical depth suggests strong potential for underground mining scenarios and tighter drill spacing to define continuity. Geotechnical and mine planning teams will now need to assess ground conditions around the high-grade zone and optimise stope designs and support for narrow, very high-grade veins.
Technical Brief
- Reverse-circulation drilling at Bull Oak is being used to target deeper, high-grade lodes beneath prior workings.
- Hole ID BORC26036 provides a precise spatial control point for future downhole surveys and structural modelling.
- RC chip logging from Bull Oak will be critical for distinguishing oxide, transitional and fresh rock domains.
- High-grade assays at depth will likely trigger oriented diamond tails to obtain reliable structural and geotechnical data.
- Underground scenarios at Sandstone would shift design focus from bulk open-pit to selective narrow-vein stoping methods.
- Mine planning teams will need to integrate new grade shells into existing Sandstone resource wireframes and pit optimisation runs.
Our Take
In our database, Brightstar Resources’ recent Sandstone and Two Mile Hill–Shillington results include multiple very long moderate-grade intercepts (over 200–300m) alongside ultra-high-grade hits like BORC26036, suggesting the broader Sandstone gold project may support both bulk-tonnage and selective high-grade mining scenarios.
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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