Auravelle Metals Targets Gold at Nuckulla Hill Along Yarlbrinda Shear Zone
Key Takeaways
- Auravelle Metals (ASX: AUV) is days away from commencing a 3,500m aircore program at Nuckulla Hill, testing five prospects — Sheoak North, Myall, Sauna, Bimba West, and Bimba North — along the Yarlbrinda Shear Zone.
- Two of the five targets, Sheoak North and Myall, sit along a +3.5km trend of gold anomalism that remains open to both the north and south, with very limited prior drilling outside of Sheoak itself.
- The Yarlbrinda Shear Zone is the same geological structure hosting Barton Gold's neighbouring 1.6Moz Tunkillia Gold Project, providing a high-grade regional analogue for Auravelle's exploration thesis.
- RC drilling at Sheoak, Sheoak East, and Bimba is scheduled to follow in early October 2026, targeting infill and extension of previously reported high-grade results.
- Five separate data releases — spanning Nuckulla Hill, the Crown Project in WA, and the Skye project — are expected within a six-to-eight week window, creating a dense near-term newsflow pipeline.
Aircore drilling days away as Auravelle targets gold along South Australia’s Yarlbrinda Shear Zone
Aircore drilling at the Nuckulla Hill Gold Project in South Australia is set to commence within days, with Auravelle Metals Limited (ASX: AUV) targeting five prospects along the Yarlbrinda Shear Zone. This is the same geological structure that hosts Barton Gold Holdings Limited’s (ASX: BGD) neighbouring 1.6Moz Tunkillia Gold Project. The Gawler Craton-focused explorer is drilling for discovery across a corridor that has seen very limited testing outside of its Sheoak prospect.
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Five targets, one shear zone — what the aircore program will test
The 3,500m aircore program will test five targets at Nuckulla Hill, all situated along the Yarlbrinda Shear Zone:
- Sheoak North
- Myall
- Sauna
- Bimba West
- Bimba North
All five prospects carry coincident gold and silver geochemical anomalism and are proximal to interpreted lithostructural targets, as shown in the company’s project map (Figure 1).
Two of the five targets, Sheoak North and Myall, sit along strike of Sheoak within a +3.5km trend of gold anomalism. This zone remains open to both the north and south, with very limited prior drilling outside of Sheoak itself, making it a priority for first-pass testing.
The program is expected to take 7 to 10 days to complete. Assay results are anticipated approximately 4 to 6 weeks after completion, placing results in late October 2026. Figure 2 in the announcement illustrates the spatial relationship between the Myall and Sheoak prospects over magnetics, highlighting the continuity of the anomalous gold trend.
RC drilling to follow — Sheoak, Sheoak East, and Bimba in the queue
Once the aircore program wraps up, Auravelle will move directly into RC drilling, targeting Sheoak for infill and extension, as well as Sheoak East and Bimba. This phase is expected to commence in early October 2026.
Sheoak has previously returned high-grade results, referenced in prior ASX releases dated 19 December 2024 and 25 February 2026. The specific intercepts from those programmes are not repeated in this announcement, but the historical context establishes why Sheoak is a priority for follow-up RC work.
The high-grade results at Sheoak from earlier programmes established the geological case that now underpins the RC follow-up phase, with prior intercepts demonstrating the kind of grade continuity that justifies the more expensive and time-intensive reverse circulation method.
The sequencing here is deliberate. Aircore testing comes first across the newer, earlier-stage targets; RC drilling, which is more expensive and time-intensive, follows where the geological case is already established. That discipline matters for investors assessing how the company is managing exploration capital.
What is aircore drilling — and why does it matter for gold exploration?
Aircore drilling is a relatively fast and cost-effective method used to collect rock chip samples from shallow depths. A rotating drill bit cuts through rock, and compressed air pushes the chips back up to the surface for sampling. It is ideally suited to first-pass testing of geochemical anomalies across broad areas.
The key trade-off against RC (reverse circulation) drilling is depth. Aircore works well at shallower depths but cannot reach the deeper zones where mineralisation is often better understood. RC drilling is slower and more expensive, but it produces more definitive results at greater depth.
For Auravelle’s program, aircore is the right tool. The five targets along the Yarlbrinda Shear Zone are new, early-stage prospects where gold and silver geochemical anomalies coincide with structural features. Testing these efficiently with aircore before committing to a full RC program is a sensible approach — and one that helps the company generate meaningful data without overcommitting capital at this stage.
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Newsflow pipeline and what investors should watch
The period ahead is shaping up as one of the more active stretches of exploration newsflow on the company’s calendar. Auravelle has disclosed the following expected catalyst sequence:
- Nuckulla Hill — regional aircore drilling (imminent, September 2026)
- Crown Project (WA) — results from recent soil sampling (coming weeks)
- Skye — first-pass soil sampling results to define drill targets (late September 2026)
- Nuckulla Hill — RC drilling at Sheoak for infill and extension (early October 2026)
- Nuckulla Hill — aircore assay results (late October 2026)
That is five potential data releases compressed into roughly six to eight weeks, spanning two states and multiple project areas.
Andrew Muir, Managing Director, Auravelle Metals Limited
“We consider the Yarlbrinda Shear zone to be highly prospective for gold mineralisation… vast sections of the Shear zone have seen little to no drilling testing.”
“We look forward to getting the drilling underway, testing these early-stage targets, with the program focusing on areas where geochemical anomalies coincide with structural target, with results due in late October.”
For investors monitoring the stock, the near-term period is not a single-event catalyst story. It is a rolling sequence of newsflow across Nuckulla Hill, the Crown Project in Western Australia, and the Skye project — with the first meaningful results expected before the end of October 2026.
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