GoldArc Resources Extends High-Grade Gold Continuity at Mt Stirling

GoldArc Resources Keeps Delivering: Grade Control Drilling Extends High-Grade Continuity Into Mt Stirling's Central Sector

GoldArc Resources (ASX: GA8) has released its third batch of assay results from the ongoing partner-funded grade control drilling program at its Mt Stirling gold deposit in Western Australia, and the results continue to build a compelling picture of a deposit with real development momentum. With standout intercepts including 1m @ 9.46g/t Au and 4m @ 5.28g/t Au, the latest data reinforces the grade continuity of high-grade gold shoots now extending across both the north-western and central sectors of the deposit — a critical step toward potential open-pit mining.

What This Batch Tells Us: Are High-Grade Shoots Remaining Consistent Across the Deposit?

The third batch covers 81 holes for approximately 2,324m, targeting the central sector of Mt Stirling. Results are described as geologically consistent with earlier batches from the north-western sector, confirming that the mineralising system is laterally continuous across the deposit footprint.

The standout intercepts from this batch are summarised below.

High-Grade Narrow Shoots

Wider Bulk Intercepts

The combination of narrow high-grade shoots and broader lower-grade envelopes is significant. Both styles of mineralisation are direct inputs into mine plan optimisation, informing decisions around ore boundaries, blast zone scheduling, and extraction efficiency.

Managing Director Paul Stephen commented: "Intercepts such as 1m @ 9.46g/t Au and 4m @ 5.28g/t Au are highly encouraging. Equally important are the wider intercepts. Results like 10m @ 1.8g/t and 9m @ 1.76g/t indicate that mineralisation is present across broader zones as well as in narrower higher-grade intervals. This information will be incorporated into ongoing geological modelling, grade control interpretation and mine planning studies."

Programme Progress: 38% Complete With More Results in the Pipeline

The 34,000m grade control RC programme is progressing systematically across the Mt Stirling deposit. As of this announcement, approximately 12,852m — or roughly 38% of total planned metres — has been completed, with multiple assay batches already dispatched and pending results.

The table below summarises the dispatch and results status across all batches.

With batches 11 through 25 still pending, investors can expect a continued cadence of result releases as data is processed, validated through QAQC review, and cleared for disclosure. That represents a substantial queue of information still to come — and each batch adds resolution to the mine plan.

Understanding Grade Control Drilling: Why Does It Matter for Mine Development?

For investors less familiar with mining terminology, it is worth examining what grade control drilling actually means and why it represents a fundamentally different and more advanced step than standard exploration drilling.

What Is Grade Control Drilling?

Exploration drilling aims to identify mineralisation and estimate potential gold quantities at a broad level. Grade control drilling, by contrast, is employed immediately before and during mining operations. It uses a much tighter drill grid — in this case, fences spaced 8 metres apart with holes approximately 6 metres apart along each fence — to define ore grades and boundaries at the resolution needed for production scheduling.

Why Does It Matter to Investors?

1. It indicates the project has matured beyond exploration and is being prepared for actual production-scale decision-making.
2. It directly informs ore and waste classification, blast zone design, and extraction sequencing — all of which affect how efficiently gold is recovered and how costs are managed.
3. Consistent GoldArc Resources Mt Stirling grade control drilling results across three result batches reduce geological uncertainty and support the confidence needed to commit to mine development.

In essence, grade control drilling represents one of the final technical steps before mining operations commence.

Glossary of Key Terms

• RC Drilling (Reverse Circulation): A drilling method where crushed rock chips are returned to surface via the drill rods, providing fast and cost-effective sampling.
• g/t Au: Grams of gold per tonne of rock — the standard measure of gold grade. Higher g/t values indicate richer mineralisation.
• JORC Resource: A mineral resource estimate compliant with the Australasian Joint Ore Reserves Committee code, representing the industry standard for publicly reported resource estimates.
• QAQC (Quality Assurance / Quality Control): A systematic programme of checks — including certified reference materials and blanks — to ensure assay results are accurate and reliable.
• Hydra Fault: The structural control at Mt Stirling along which the high-grade gold shoots are interpreted to be hosted.
• Net Profit Share: An arrangement where two parties share profits from a project after costs, without requiring one party to contribute to upfront capital costs.

The BML Ventures Partnership: Capital-Light Development With Aligned Incentives

One of the more strategically notable aspects of the Mt Stirling story is the funding structure underpinning this programme. The entire 34,000m grade control programme is 100% funded by BML Ventures Pty Ltd (BMLV) under a 50/50 net profit share arrangement, with GoldArc retaining 100% ownership of the Mt Stirling mining lease (M37/1306).

This structure delivers several advantages for GoldArc shareholders:

• Zero capital cost to GoldArc for the grade control programme — all drilling, sampling, and assay costs are borne by BMLV.
• GoldArc's own capital is preserved for new exploration across its broader 936km² Leonora district footprint, where the company is actively pursuing new discovery.
• BMLV's financial commitment to the programme is itself a form of validation — a well-resourced partner has assessed Mt Stirling and committed real capital to advancing it toward production.
• Aligned incentives: both parties benefit directly from optimising the mine plan and maximising recovered gold under the profit share structure.

Furthermore, for GoldArc, this represents a capital-efficient pathway to potential mine development without diluting exploration capacity across the broader portfolio.

Geological Context: Why Is the Central Sector Extension Significant?

The Mt Stirling deposit sits within the Norseman-Wiluna belt of Western Australia's Eastern Goldfields terrane — one of the world's most prolific gold-producing regions. The deposit's gold mineralisation is associated with high-strain deformation along the Hydra Fault, with gold preferentially hosted in strongly silicified, sulphidic intervals with elevated arsenic content.

The significance of this third batch extending the GoldArc Resources Mt Stirling grade control drilling results into the central sector is that it confirms the mineralising system is not confined to the north-western sector reported in earlier announcements.

Results from both sectors are described as geologically consistent, supporting the interpretation that grade continuity exists laterally across the deposit. This characteristic supports the development of a coherent mine plan rather than isolated high-grade pods — a meaningful distinction for project economics and development confidence.

This geological consistency across sectors provides evidence that moves a project from a promising resource to a credible development candidate.

What's Next: Continued Results and Mine Planning Advancement

GoldArc's immediate priorities are clearly defined:

1. Continue the 34,000m RC grade control programme at Mt Stirling and Stirling Well under the BMLV partnership, with the remaining approximately 62% of planned metres still to be completed.
2. Release further assay batches progressively as data is processed through QAQC, geological review, and validation — with batches 11 through 25 already dispatched and pending.
3. Feed grade control data directly into the mine plan, advancing Mt Stirling toward potential open-pit development under the 50/50 profit share arrangement with BMLV.
4. Maintain exploration focus across GoldArc's broader 936km² Leonora district footprint, using preserved capital for new discovery work alongside the partner-funded development programme.

In addition, the near-term newsflow from Mt Stirling is well-defined — investors should expect multiple further result announcements as the remaining batches are processed and released.

GoldArc's Broader Resource Base: Context for the Mt Stirling Story

Mt Stirling sits within a broader portfolio of gold assets underpinning GoldArc's total 200,014 oz JORC Mineral Resource across the Leonora and Kookynie districts.

Mt Stirling is the flagship asset and the most advanced toward development. However, the broader portfolio — spanning multiple projects across one of Australia's premier gold districts — gives GoldArc a diversified base from which to grow its resource base and pursue new discoveries.

Why Should Investors Keep a Close Eye on GoldArc Resources?

The Mt Stirling grade control programme represents a genuine step-change in the maturity of this project — transitioning from resource estimation toward the technical groundwork for potential open-pit production. Three consecutive batches of results have returned consistent high-grade intercepts and broader mineralised envelopes across multiple sectors of the deposit.

Moreover, more than half of the programme's planned metres remain to be drilled, sampled, and reported. The key reasons for investors to monitor GoldArc closely include:

• Consistent high-grade results across two sectors of the deposit, with multiple intercepts exceeding 4g/t Au and broader zones averaging above 1.5g/t Au.
• A fully partner-funded development programme that preserves GoldArc's capital while advancing Mt Stirling toward potential production — a rare and favourable funding structure.
• A substantial results pipeline with batches 11 through 25 still pending, representing meaningful near-term newsflow.
• A 200,000oz JORC resource base spread across multiple projects in a world-class gold district, with exploration upside across 936km².
• A capital-light business model that allows GoldArc to pursue new discovery work alongside partner-funded development at Mt Stirling simultaneously.

Key Takeaway: GoldArc Resources has positioned itself as a focused Western Australian gold developer with a compelling near-term development pathway at Mt Stirling — funded by a strategic partner — while retaining exploration upside across a substantial district-scale footprint. With the GoldArc Resources Mt Stirling grade control drilling results demonstrating consistent high-grade continuity across multiple sectors, and more than a dozen assay batches still to be released, investors have every reason to keep this one on their watchlist.

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