Yandal Resources Extends High-Grade Domain C 80m Deeper at Arrakis
Key Takeaways
- Diamond core tail 26IWBRC0117D returned 24.2m @ 1.4g/t Au from 237.8m (18m ETW), including 3.0m @ 5.4g/t Au, extending Domain C approximately 80m down-plunge at a vertical depth of 200m.
- Domain C remains open at depth, with the zone plunging at approximately 45° to the southwest — directing future drilling deeper down-plunge rather than along strike.
- The final Arrakis diamond tail (26IWBRC0116D) and first results from the parallel Anders target are both anticipated in September, keeping near-term news flow dense.
- Six separate prospect-level results are expected across the IWB project in September, spanning Arrakis, Anders, Flushing Meadows, Giedi Prime, Salusa, and Siona.
- The IWB project carries a defined 268koz @ 1.1g/t Au Mineral Resource Estimate at Flushing Meadows, providing a resource foundation while Arrakis exploration advances.
Domain C extends at depth as Arrakis drilling delivers another high-grade hit
Yandal Resources (ASX: YRL) has received assay results from diamond core tail 26IWBRC0117D at the Arrakis Prospect within the Ironstone Well-Barwidgee (IWB) Gold Project in the Yandal Greenstone Belt, Western Australia. The headline intercept from the 8 September 2026 announcement is:
- 24.2m @ 1.4g/t Au from 237.8m (ETW 18m)
- Including 8.3m @ 3.0g/t Au from 240.7m
- Further including 3.0m @ 5.4g/t Au from 246.0m
The result extends the newly defined high-grade Domain C approximately 80m down-plunge, at an approximate vertical depth of 200m, where it remains open at depth. Results from the final diamond tail, 26IWBRC0116D, are anticipated in September, keeping near-term news flow dense for investors watching the program.
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What Domain C means for the Arrakis mineralised system
Understanding high-grade domains within a large mineralised system
At an exploration-stage project, not all gold is created equal. The broad mineralised envelope at Arrakis spans more than 1.3km of strike and contains a lower-grade style of mineralisation hosted within a silica-sericite altered dacite porphyry. Within that system, however, tighter zones of structurally controlled, higher-grade mineralisation exist — and it is these zones that tend to drive the economics of any future resource.
Domain C is one such zone. Where the broader system delivers wider but lower-grade intercepts, Domain C is characterised by both broader widths and higher grades simultaneously, making it a priority target for follow-up drilling.
A note on measurement: all intercepts in this announcement are reported as down-hole lengths. The Estimated True Width (ETW) is the geologically corrected width of the mineralised interval, accounting for the angle of the drill hole relative to the ore body. At Arrakis, true widths are approximately 60–70% of the down-hole length, making the ETW figure a more meaningful measure of actual mineralised thickness. The 18m ETW reported for the headline intercept reflects this correction.
How Domain C was identified
Domain C was defined progressively through a sequence of infill RC and diamond drilling on 100m-spaced lines across the Arrakis discovery. Prior intercepts that established the domain were reported in ASX releases dated 24 September 2025, 10 August 2026, and 25 August 2026, and included:
The record high-grade intercepts at Arrakis, including the 20m @ 8.7g/t Au result containing a 3m interval at 52.8g/t Au, established the initial case that Domain C represented a structurally distinct, higher-grade zone within the broader mineralised envelope.
- 20m @ 8.7g/t Au from 84m in 26IWBRC0120 (ETW 13m), incl. 6m @ 28.3g/t Au, further incl. 3m @ 52.8g/t Au
- 17.5m @ 2.3g/t Au from 127.5m in 26IWBRC0121D (ETW 14m)
- 17.0m @ 1.1g/t Au from 162.0m in 26IWBRC0121D (ETW 10m)
- 50m @ 1.3g/t Au from 122m in 25IWBRC0042 (ETW 20m), incl. 28m @ 1.9g/t Au
Combined, these results suggest Domain C plunges approximately 45° to the southwest. That structural geometry is what directs future drilling: stepping out down-plunge, deeper, is where the program will aim next.
Chris Oorschot, CEO, Yandal Resources
“This is another encouraging result from our Arrakis program, providing further confirmation of the newly identified domain of broader and higher-grade mineralisation within the Arrakis mineralised system, now designated as Domain C. The results have extended Domain C mineralisation approximately 80m down-plunge, and raise the question of whether similar widths and grades continue further at depth. Future drilling programs will aim to test the extent of Domain C at depth.”
Flushing Meadows and the broader IWB exploration picture
Diamond and RC results add texture at Flushing Meadows
Results from diamond holes 26IWBRC0096D, 26IWBRC0097D, and 26IWBRC0099D at Flushing Meadows have been received. Significant intercepts include:
- 3.5m @ 4.1g/t Au from 157.8m in 26IWBRC0097D, incl. 0.5m @ 25.2g/t Au
- 4.0m @ 2.6g/t Au from 214.3m in 26IWBRC0097D
- 2.1m @ 1.5g/t Au from 208.2m in 26IWBRC0099D, incl. 0.7m @ 3.1g/t Au
The 3.5m @ 4.1g/t Au result from 26IWBRC0097D is located in the hanging wall of the targeted Flushing Meadows structure and represents a vein-hosted style of mineralisation, separate from the main structure. The announcement notes it is associated with narrow, deformed veins within foliated basalt. This result adds geological understanding of the broader system rather than representing a standalone discovery.
RC follow-up drilling at Flushing Meadows (holes 26IWBRC0131, 26IWBRC0132, and 26IWBRC0133) was designed to assess down-dip continuity of a shallow intercept from 26IWBRC0098DA. The notable result from the RC program was 1m @ 11.0g/t Au from 181m in 26IWBRC0132. However, based on assay results and geological observations, the significant shallow mineralisation from 26IWBRC0098DA appears limited in dip extent and is likely secondary in nature.
The established resource underpinning the Flushing Meadows project is a Mineral Resource Estimate (MRE) of 268koz @ 1.1g/t Au (Indicated + Inferred), as confirmed in Table 1 of the announcement. That existing resource base provides the project with a defined foundation while Arrakis exploration continues to progress.
Shallow oxide gold at Flushing Meadows had previously been identified outside the boundaries of the existing 268koz Mineral Resource Estimate, pointing to exploration upside that sits alongside the current diamond and RC drilling program targeting deeper structural mineralisation.
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Near-term catalysts — what investors should watch for
The announcement describes a high-density news flow period across the IWB project. Drilling activities on site have been paused to allow all outstanding assays to be received and assessed before the next program is planned — a disciplined sequencing approach that positions the company to make informed decisions about where to drill next.
Concrete near-term expected results from the “Next Steps” section include:
- 26IWBRC0116D (final Arrakis diamond tail) — results anticipated September
- First results from the Anders target (parallel to Arrakis) — anticipated September
- Further Flushing Meadows diamond drilling results — anticipated September
- First air-core results from Flushing Meadows and Giedi Prime — anticipated September
- Salusa Prospect drilling results (New England Granite, 6m @ 6.3g/t Au from 36m high-grade target) — results expected early September
- Follow-up RC drilling results at Siona — expected September
| Prospect | Drill Program | Expected Result | Timing |
|---|---|---|---|
| Arrakis | Diamond core tail 26IWBRC0116D | Final diamond tail assays | September 2026 |
| Anders (parallel to Arrakis) | Air-core / RC first pass | First results from Anders target | September 2026 |
| Flushing Meadows | Diamond drilling program | Further diamond hole assays | September 2026 |
| Flushing Meadows / Giedi Prime | Air-core drilling | First air-core results | September 2026 |
| Salusa (New England Granite) | RC drilling of high-grade target | Drilling results (target: 6m @ 6.3g/t Au from 36m) | Early September 2026 |
| Siona | Follow-up RC drilling | Results from oxide intercept follow-up | September 2026 |
For investors watching Yandal Resources, the picture heading into the final weeks of September is one of meaningful geological momentum. Arrakis now has a defined high-grade Domain C that remains open at depth, the IWB project holds a 268koz existing resource at Flushing Meadows, and multiple assay results across several prospects are anticipated within weeks.
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