Bryah is increasingly confident that it is vectoring in on a potential copper-gold source at its Windalah prospect after drilling intersected a broad sulphide-rich zone.

Notably, the zone returned highly-elevated volcanogenic massive sulphide (VMS) pathfinder minerals as well as top copper hits of 2m at 0.23% copper from 132m and 4m at 0.12% copper from 136m.

Along with a dipole-dipole induced polarisation survey identifying a coincident geophysical anomaly at depth, Bryah Resources (ASX:BYH) believes that the latest drilling of eight holes in April is closer to the copper-gold source.

The result is encouraging as the Bryah Basin, where Windalah is located, hosts some world-class VMS copper-gold deposits such as Sandfire’s DeGrussa.

“This first round of deep drilling at Windalah provides the company with increasing confidence as we vector in, on what we believe to be, a potential copper-gold source at depth,” managing director Neil Marston said.

“We have confirmed with this drilling that there is a major volcanogenic massive sulphide system at Windalah. The system is extensive in size and open at depth.

“We are observing highly elevated key pathfinder minerals, including some copper, within a broad sulphide-rich zone.

“Significantly, we are also recording conductive responses from geophysical surveys of this zone which lies in the same stratigraphy as the nearby known high-grade copper-gold deposit at Horseshoe Lights.”

The company plans to start Phase 2 diamond drilling later this month to test this sulphide-rich zone at depth.

Drill results

The Phase 1 reverse circulation drill program consisted of eight holes totalling 1,925m.

Of these, three holes were drilled close to their target depths and intersected a broad disseminated to semi-massive sulphide zone with highly elevated antimony and arsenic, together with weakly elevated copper and gold values.

The remaining five holes did not reach target depth due to ground conditions though some of the five holes will be extended with diamond tails during Phase 2 drilling.

Assay results significantly increased the size and tenor of the downhole geochemical anomaly identified in previous drilling.

Bryah noted that the suite of elements enriched at Windalah is typical of many VMS deposits globally and is comparable to the nearby high-grade Horseshoe Lights copper-gold mine.

Importantly, the intersection of a zoned pathfinder enrichment halo suggests that the arsenic-antimony-molybdenum-thallium enriched footwall may be close to potential copper-gold mineralisation at the prospect.

As such, the Phase 2 diamond holes are planned to pass underneath these zones.



This article was developed in collaboration with Bryah, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.