North Stawell Minerals (ASX:NSM) has reported promising aircore drilling results at its Darlington and Caledonia projects, revealing multiple gold intercepts that align with the historic Mariners Lodes near Stawell, Victoria.
- Encouraging gold intercepts at Darlington and Caledonia
- Mineralisation parallels historic Mariners Lodes
- Follow-up diamond drilling planned to refine geological model
- Targets remain open along strike and at depth
- Results support potential for multi-million-ounce deposit repeats
Aircore Drilling Highlights Gold Potential Near Stawell
North Stawell Minerals (ASX:NSM) has delivered a fresh wave of optimism for its Victorian gold exploration with recent aircore drilling at the Darlington and Caledonia projects. The company reported several gold intercepts, notably 6 metres at 0.5 g/t Au and 3 metres at 0.57 g/t Au at Darlington, alongside 3 metres at 1.49 g/t Au and 9 metres at 0.62 g/t Au at Caledonia. These results reinforce the prospectivity of a highly mineralised corridor extending north from the Stawell Gold Mine.
Darlington’s intercepts, particularly holes NSAC0630 and NSAC0632, show strong structural and mineralogical similarities to the historic Mariners Lodes, a multi-million-ounce deposit located just 6 kilometres south. This parallel is significant given Mariners’ reputation for high-grade, structurally controlled gold mineralisation. The new data supports the notion that the Stawell corridor hosts multiple repeats of this mineralisation style, a thesis that has guided NSM’s exploration strategy for several years.
Bill Reid, NSM’s Executive Director and Head of Exploration, emphasised the continuity of mineralisation along strike and the encouraging correlation with previous high-grade intercepts, stating that the results “continue to reinforce the parallels we are drawing in geology, mineralisation style, grade distribution and structural setting with the historic Mariners Lodes.” The company’s methodical approach is building a geological model that could unlock significant value in this underexplored belt.
Geological Setting and Mineralisation Style
The Darlington and Caledonia projects sit within a 445 km2 land package that covers a gold-prospective corridor immediately north of Stawell. The mineralisation encountered consists of brecciated, faulted quartz veins with visible gold, arsenopyrite, and pyrite, hosted within carbonaceous sediments and basalt margins. This style mirrors the Mariners reef system, which is known for its complex faulting and multi-phase quartz veining.
The company’s aircore drilling was designed to test strike extensions of previously identified high-grade zones, with results confirming anomalous gold values along both the northern and southern trends. The Caledonia results also align with earlier soil geochemistry anomalies, reinforcing the broader Darlington/Caledonia mineralised trend. The presence of multiple discontinuous gold zones, some exceeding 1 g/t Au, suggests a structurally complex system that warrants further detailed investigation.
Next Steps: Diamond Drilling and Geological Modelling
NSM plans to follow up these encouraging aircore results with diamond drilling aimed at refining the geological model and testing depth extensions. Composite assays above 0.25 g/t Au will be resampled at 1-metre intervals to identify higher-grade components. The company also intends to interpret and report results extending into the Darlington West area separately, where recent diamond drilling has validated gold mineralisation along the strike.
The recent aircore program faced some assay delays due to high laboratory sample volumes, but the company maintains confidence in the data quality, supported by robust QAQC protocols and verification by a Competent Person. The drilling orientation was designed to intersect mineralised structures perpendicularly, minimising sampling bias.
This update builds on NSM’s ongoing exploration momentum, following earlier high-grade intercepts and surface geochemistry results that highlighted the potential of the Stawell corridor. The company’s systematic approach and strategic landholding position it well to delineate a significant gold resource in a region with a proven production history.
These findings come amid a flurry of activity in the region, with NSM’s recent aircore drilling program following earlier campaigns that targeted similar structural trends and mineralisation styles. The company’s focus on replicating the multi-million-ounce Stawell deposits under shallow cover continues to guide its exploration efforts, with the Darlington and Caledonia projects emerging as key pillars in this strategy.
As NSM advances its exploration, the market will be watching how the diamond drilling results and refined geological models shape the company's resource potential. The continuity of mineralisation along strike and at depth remains a critical question, as does the extent to which these zones can be economically developed.
With the Darlington and Caledonia targets still open in all directions, North Stawell Minerals is poised to unlock further value from this prolific gold corridor in Victoria.
These results build on the company’s earlier high-grade discoveries and recent high-grade gold potential, while following up on the aircore program first announced in March 2026 that sought to expand mineralisation at Darlington and Caledonia air core drilling underway.
Bottom Line?
Upcoming diamond drilling results will be pivotal in confirming the continuity and economic potential of these promising gold intercepts.
Questions in the middle?
- Will diamond drilling confirm the depth and strike continuity of the Darlington and Caledonia mineralisation?
- How will NSM’s geological model evolve with the integration of new assay and structural data?
- What are the implications of these results for resource definition and potential development timelines?