Hamelin Gold Launches Maiden Diamond Drilling to Test Depth of Aurora Gold Lodes
Key Takeaways
- Hamelin Gold's Phase 2 RC drill program at Day Dawn expanded 33% beyond its original plan — from ~3,000m to 4,000m across 35 holes — signalling geological confidence in the system during execution.
- More than 4,000 samples are now submitted for assay, with results expected in October 2026, making that the next hard data catalyst for investors to watch.
- Geological observations confirm both the Aurora and Altus gold lodes remain open at depth, supporting the thesis that the system extends well below current drilling limits.
- Maiden diamond drilling is scheduled to commence within approximately four weeks, targeting down-plunge extensions of the Aurora and Altus lodes beyond the reach of RC equipment.
- The Day Dawn system hosts both lode-style and reef-style gold mineralisation — an architectural combination management compares to the nearby Telfer deposit, a +20 million ounce gold-copper mine located 10km to the southeast.
Phase 2 RC drilling complete as Hamelin Gold advances to maiden diamond program at Day Dawn
Hamelin Gold (ASX:HMG) has completed its Phase 2 reverse circulation (RC) drill program at the Day Dawn Gold Project in the Paterson Province of Western Australia. The program expanded from a planned ~3,000m to 4,000m across 35 holes, a signal that the geology team saw enough to justify pushing further. More than 4,000 samples are now submitted for assay, with results expected in October 2026, and maiden diamond drilling is scheduled to commence within four weeks.
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What the Phase 2 RC program revealed
The Phase 2 program was designed around three core objectives:
- Testing near-surface extensions of the high-grade Aurora and Altus gold lodes
- Assessing down-plunge continuity of mineralisation along the Aurora lodes
- Completing an initial evaluation of potential parallel lode positions adjacent to the Aurora–Altus corridor
Geological observations from the program indicate that both the Aurora and Altus lodes remain open at depth, reinforcing the potential for the system to extend below the current limits of drilling. Downhole televiewer surveys were completed in selected RC holes, providing structural data on the orientation and geometry of both lode and reef-style mineralisation. These datasets are contributing to the development of a three-dimensional structural model that will sharpen future drill targeting.
A practical limit of RC drilling is also now in view: where wet sample returns are encountered below approximately 150–200m depth, diamond drilling becomes necessary to maintain sample quality and confidence in the geological interpretation.
Understanding the Day Dawn gold system — why the architecture matters
Day Dawn hosts two distinct styles of gold mineralisation, and understanding the difference matters for how you read the scale potential here.
The first is lode-style mineralisation (sometimes called feeder-style): steeply dipping, parallel high-grade gold lodes that cut through the host rock. The second is reef-style mineralisation (stratigraphically controlled), where gold is hosted along specific rock layers rather than cutting across them. Finding both styles in a single system is significant because it suggests a larger, more complex geological setting rather than a simple, narrow vein target.
The company notes this dual-style architecture is considered analogous to the architecture of major Proterozoic sediment-hosted gold deposits, including the nearby Telfer deposit, a +20 million ounce gold-copper mine located 10 km to the southeast. That comparison is made by management, not independently verified, and Day Dawn remains an early-stage exploration project. The point is not that Day Dawn is Telfer, but that the structural architecture warrants the kind of deeper testing that Telfer-scale systems require.
RC drilling has so far tested only the shallow upper portions of the system. The combination of open-ended lodes at depth and a second mineralisation style emerging at surface means the geological story at Day Dawn is still being written.
RC pre-collars are an important technical detail here. These are RC-drilled holes that stop short of their final depth, leaving a starter hole into which a diamond drill rig can be inserted to continue deeper. They are essentially a setup shot: efficient to drill with RC equipment in the shallower, drier ground, then extended with diamond drilling where the ground gets wet and sample quality requires it.
Maiden diamond drilling campaign — what comes next
The upcoming diamond program will comprise two components: diamond tails extending selected RC pre-collars, and dedicated large-diameter core holes through the upper Aurora and Altus lodes. The program’s key objectives are:
- Down-plunge extension testing of the Aurora and Altus lodes beyond the depth limits of RC drilling
- Preliminary metallurgical test work from shallow core samples
- High-quality structural data to validate and refine the three-dimensional geological model
Diamond drilling is scheduled to commence within approximately four weeks, making it the near-term catalyst investors should be watching.
Peter Bewick, Managing Director and CEO
“Activity at our Day Dawn Gold Project continues to build momentum, with the expanded Phase 2 RC drilling program now complete and more than 4,000 samples submitted for analysis. Geological observations from the program support our view that the Aurora and Altus lodes may represent the upper position of a potentially significant, depth extensive mineral system. The completion of a series of RC pre-collars has positioned Hamelin to commence its maiden diamond drilling campaign at Day Dawn, marking another important step in unlocking the broader potential of the project…”
| Milestone | Detail | Timing | Significance |
|---|---|---|---|
| Phase 2 RC complete | 35 holes, 4,000m drilled | September 2026 | Program expanded from planned 3,000m; samples submitted |
| Assay results | 4,000+ samples | October 2026 | First grade data from Phase 2 program |
| Diamond drilling commences | RC pre-collar tails + dedicated core holes | ~4 weeks from announcement | Maiden diamond program; tests depth extensions of Aurora and Altus lodes |
| Metallurgical test work | Shallow core samples | TBC | Supports future resource development pathway |
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About Hamelin Gold and the broader project portfolio
Hamelin Gold (ASX:HMG) is a Perth-based gold exploration company with landholdings across the Tanami, Paterson and Yilgarn Gold Provinces of Western Australia. Current exploration is focused on Day Dawn, with drilling activities also planned at the Venus project in the Yilgarn and the West Tanami project. The company’s shareholder register includes prominent gold miners Gold Fields Limited (JSE/NYSE:GFI) and Vault Minerals Limited (ASX:VAU), a detail that provides some external validation of the asset quality without implying a formal endorsement or investment recommendation.
West Tanami gold mineralisation has also returned encouraging results across Hamelin’s landholding in that province, adding a second active exploration front to the company’s pipeline as Day Dawn advances toward its maiden diamond program.
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