Brightstar Resources has announced a string of high-grade and broad gold intercepts from its latest growth-focused reverse circulation (RC) drilling at the Sandstone Hub in WA, successfully testing for extensions outside of existing mineral resources at the Bull Oak and Havilah deposits.
The drilling results at Bull Oak were particularly impressive, yielding broad, unconstrained intercepts highly prospective for mineral resource estimate (MRE) growth. Key results include 157m at 1.13 grams per tonne (g/t) Au from 18m (BORC25006), which contained a high-grade section of 3m at 31.4g/t Au from 130m. Another hit, BORC25013, delivered 10m at 5.83g/t Au from 11m, contained within 73m at 1.14g/t Au from 11m.
The program returned a strong high-grade intercept at the Havilah Deposit, confirming down-dip extensions to known mineralisation. Hole HVRC25015 delivered 5m at 12.8g/t Au from 142m, which included a bonanza grade of 1m at 55.2g/t Au from 142m.
“These results from our Sandstone Hub continue illustrate the significant potential growth to our existing MRE. All of these drill holes, at both Havilah and Bull Oak, targeted zones outside of the existing resource and confirmed significant mineralisation in these areas,” Brightstar managing director Alex Rovira said.
“The broad mineralised intercepts at the Bull Oak deposit, hosted by multiple high-grade quartz veins within a broader lower-grade mineralised granodiorite, is extremely prospective for material MRE growth at that deposit.
“The Bull Oak granodiorite intrusion has an interpreted strike length of approximately 500m and a width of up to 150m and has not been defined at depth, representing a possible high tonnage deposit similar to the Two Mile Hill–Shillington complex, acquired from Aurumin, located 7km to the south-east that hosts a mineral resource of 0.7 million ounces at 1.5 grams per tonne Au.”
With four of the company’s six active rigs focused on resource growth and confidence classification at the Sandstone Hub, exploration is accelerating. Concurrently, pre-feasibility dtudy (PFS) workstreams are well underway, with Brightstar targeting robust PFS delivery in 2026.
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