Dundas Minerals Confirms High-Grade Gold Shoots at Rockland Near Kalgoorlie

High-Grade Gold Shoots Confirmed at Rockland as Dundas Minerals Builds a 2km+ Corridor Story Near Kalgoorlie

Dundas Minerals Limited (ASX: DUN) has reported single-metre re-assay results from the Rockland Gold Project, about 40km north of Kalgoorlie in Western Australia, sharpening the definition of a gold system that the company says may extend across an interpreted corridor of more than 2km. The updated assays include 1m @ 20.35 g/t Au from 140m, within 3m @ 6.94 g/t Au from 138m in hole 26RKRC005, and support the company's view that Rockland hosts high-grade shoots within a broader north-south mineralised trend.

According to the ASX announcement dated 23 June 2026, the latest work breaks down previously reported 4m composite samples into individual 1m parent samples using photon assay. For investors, that matters because it gives a clearer view of how gold grade is distributed within the host rocks and whether stronger results are isolated or form part of a repeatable structural pattern.

What the Re-Assay Results Show at Rockland

In the announcement, Dundas said the earlier drilling had already intersected broad zones of gold mineralisation beneath and along strike from previously reported high-grade discovery intercepts. The new 1m results refine that picture rather than replacing it.

The strongest interval came from 26RKRC005, where a broader mineralised zone contains a high-grade core. Furthermore, other holes also returned elevated single-metre grades, suggesting the system includes multiple mineralised shoots rather than a single isolated high-grade point.

Key Rockland Re-Assay Results

The full table in the report also includes several lower-grade intervals above the 0.2 g/t Au cut-off, including a 7m @ 0.84 g/t Au interval from 175m in 26RKRC005 that contains 1m @ 2.18 g/t Au and 1m @ 2.67 g/t Au. Hole 26RKRC004 returned no significant results above the cut-off grade.

What is the practical takeaway? The reported assay distribution suggests Rockland is not defined by one intercept alone. Instead, the drilling is beginning to outline repeated mineralised zones at different depths and across multiple drill lines.

"The results confirm high-grade gold in shoots hosted in the mineralised trend that is interpreted to extend for over 2km from the Capricorn gold deposit down through the 1km of identified mineralisation at Rockland. This extensive system warrants further drilling and represent a significant emerging gold system within the Kalgoorlie district."

— Dundas Minerals, ASX announcement, 23 June 2026

Why Single-Metre Re-Assays Matter in Gold Exploration

The educational point in this update is the difference between a composite sample and a single-metre assay.

In early-stage Reverse Circulation (RC) drilling, companies often combine material from several adjacent metres into one sample for lab analysis. This is cost-effective and useful for first-pass testing across larger areas. In Dundas' earlier Rockland program, 4m composite samples were used.

That approach, however, averages results across the full sample interval. If one metre contains very strong gold and the surrounding three metres are weaker, the composite may understate the strength of the high-grade section.

Why Should Investors Care?

Single-metre assays can improve understanding in three important ways:

1. Geological clarity — They help geologists identify whether gold is spread evenly or concentrated in narrower shoots controlled by structures such as faults or veins.

2. Targeting future drilling — If high grades are shown to cluster in repeatable positions, follow-up holes can be designed more precisely.

3. Potential resource interpretation — While Rockland does not yet have a reported resource, understanding grade distribution is important for any future Mineral Resource Estimate.

In the Dundas report, the retained 1m parent samples were submitted for photon assay, which the company describes as a total assay method. In simple terms, this is a laboratory technique used to measure gold content from the drill sample without relying on a combined average across several metres.

Simple Glossary

• RC drilling: A common drilling method that produces rock chips from underground for sampling.
• g/t Au: Grams of gold per tonne of rock.
• Composite sample: A sample made by combining material from several drill intervals.
• Photon assay: A laboratory method used to determine gold concentration.
• Mineralised shoot: A higher-grade zone within a broader mineralised area.
• PoW: Programme of Work, a required approval before drilling can begin in Western Australia.

A Broader Corridor Is Emerging from Rockland to Capricorn

The announcement frames Rockland as part of a broader mineralised system rather than a stand-alone target. Dundas said mineralisation remains open along strike and at depth, within a trend interpreted to extend from Rockland through Aquarius and Capricorn to Gemini in the north.

This corridor concept is central to the investment case because it links current Rockland drilling with previously reported gold results elsewhere in the project area.

Prospect Corridor Summary

According to the report, the most southern line of drilling at Capricorn returned:

• 23WDRC003: 3m @ 9.14 g/t Au from 114m
• 23WDRC004: 3m @ 5.3 g/t Au from 28m
• 23WDRC005: 1m @ 6.6 g/t Au from 25m

Dundas stated that these values align along structures interpreted to dip east at about 30 degrees, which is said to be consistent with structural controls observed at Rockland. In addition, the company noted these Capricorn results have not yet been incorporated into the resource model.

At Aquarius, earlier drilling referenced in the announcement included:

• 3m @ 10.2 g/t Au from 109m, including 1m @ 29.6 g/t Au
• 1m @ 5.8 g/t Au from 75m
• 1m @ 5.04 g/t Au from 49m
• 3m @ 1.8 g/t Au from 74m
• 2m @ 6.5 g/t Au from 70m

The gap between Rockland and Capricorn is described as a planned drilling target. For investors, this is an important point. If follow-up work supports continuity between the known drill zones, the corridor concept could gain considerably more weight.

What Comes Next from Dundas Minerals?

The latest announcement points to an active field period across the company's Kalgoorlie district gold assets.

Dundas said Programmes of Work have been approved for drilling on the recently granted Capricorn Mining Lease, with drilling expected to proceed after completion of a required heritage survey, anticipated in early July 2026. Drilling contractors are also being approached for follow-up work at Rockland and for extensional and infill drilling at Capricorn and Baden-Powell.

Near-Term Activity Pipeline

The announcement also states that internal conceptual pit shell sensitivity work at Capricorn has been used solely as a drill-targeting tool. The company explicitly said this work is preliminary, is not a mining study, does not establish economic viability, and should not be interpreted as a production target or forecast financial information.

That distinction is important. The current focus remains exploration and drill targeting rather than project development economics.

Why This Update Matters to ASX Gold Investors

For an ASX gold exploration company, re-assay news can sometimes be technical housekeeping. However, in this case, the Rockland result has broader implications because the higher-resolution data supports a structural interpretation across more than one prospect.

Several factors stand out:

• The headline grade of 20.35 g/t Au is materially stronger than what a composite average alone would show, indicating that at least part of the Rockland system contains discrete high-grade sections.
• The assays were returned from multiple holes, not only one interval, which improves confidence in the continuity of mineralisation patterns, even though true widths are still not known.
• Dundas now controls the Rockland Mining Lease outright, with Mining Lease M24/974 previously held by Rockland Pty Ltd acquired via payment of $100,000.
• The broader Kalgoorlie district setting places the company's Rockland, Capricorn and Baden-Powell projects close to existing gold processing infrastructure, which is often relevant when investors assess future development pathways.

Why Dundas May Stay on Gold Investors' Watchlists

This ASX announcement does not present a new resource at Rockland, nor does it claim economic viability. What it does offer, however, is a more detailed view of grade distribution within a growing gold system.

According to the report, Rockland now has:

• Confirmed single-metre high-grade gold within broader mineralised intervals
• Mineralisation interpreted over roughly 1km at Rockland
• An interpreted link to a corridor of more than 2km
• Planned follow-up drilling at depth and between key prospects
• A nearby anchor asset in Capricorn, which hosts a previously reported Mineral Resource Estimate

For investors focused on early-stage gold exploration, that combination can be highly relevant. The next phase of drilling will likely be watched for two reasons: whether Rockland extends at depth, and whether the gap toward Capricorn begins to show continuity along the interpreted structural trend.

"The 1m re-assay work at Rockland has clarified that previously reported composite intervals include genuine high-grade gold zones, led by 1m @ 20.35 g/t Au. Just as important, the announcement places Rockland within a broader corridor linking Aquarius, Capricorn and Gemini, with further drilling planned to test continuity. For ASX: DUN, the next results are likely to be judged not only on grade, but on whether they strengthen the case for a connected Kalgoorlie district gold system."

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