Dart Mining Strikes High-Grade Gold Discovery at Coonambula Queensland

Dart Mining Delivers Outstanding High-Grade Results as Coonambula Project Expands Beyond Original Scope

Dart Mining NL (ASX:DTM) has released exceptional surface sampling results from its Coonambula Antimony-Gold Project in Central Queensland, marking a significant expansion of the prospective gold zone beyond the original Banshee Mine area. The systematic sampling programme has revealed 5m @ 2.55g/t gold + 1.35% antimony in trench sampling, whilst exploration of previously unsampled areas has returned standout results of 10.45g/t gold at McKonkeys North and 7.26g/t gold at Lady Margaret prospects.

This represents a major step forward for Dart Mining's farm-in joint venture with Great Divide Mining (ASX:GDM), demonstrating that the Coonambula goldfield holds significant potential across a much broader area than initially anticipated. With diamond drilling assays from the company's 2025 drilling programme expected in February 2026, this latest gold discovery at Dart Mining is positioning the company for what could be a substantial resource definition at one of Queensland's most promising antimony-gold projects.

Systematic Trench Sampling Reveals Continuous High-Grade Zone

The report outlined the most significant results from Trench T10, located immediately south of the historical Banshee Mine, where systematic 1-metre channel sampling revealed a continuous high-grade zone. Furthermore, these results demonstrate the potential for bulk ore zones extending from surface, providing excellent economics for future development.

Key Trench T10 Results:

• 5m @ 2.55g/t Au + 1.35% Sb (composite zone)
• 1m @ 8.92g/t Au + 0.75% Sb (high-grade core)
• 1m @ 1.24g/t Au + 5.14% Sb (antimony-rich zone)
• 1m @ 1.17g/t Au + 0.74% Sb

"Results from samples that lie perpendicular to the Banshee Mine highlight another significant gold zone. It speaks to the potential bulk ore zone, from surface, that will be reviewed as we receive further drill hole assays in coming weeks." – James Chirnside, Managing Director

The trench sampling is particularly important as it demonstrates continuity of mineralisation away from the historical mine workings. In addition, it suggests the potential for a much larger ore body than previously understood at this emerging gold discovery at Dart Mining.

District-Scale Gold Discovery Potential Emerges

McKonkeys North Prospect: 10.45g/t Gold Discovery

According to the report, the McKonkeys North historical workings, located 2.3km northwest of the Banshee mine, returned exceptional grades. However, what makes this discovery particularly significant is the consistent structural control across multiple quartz veins.

• 10.45g/t Au + 19.4g/t Ag from mullock piles
• Multiple quartz veins with combined strike length of ~1.2km
• Vein widths varying from 10cm to 1m
• Consistent 80-95 degree strike across the prospect

Lady Margaret Prospect: 7.26g/t Gold Confirms Extension

The report highlighted that Lady Margaret, positioned 1.7km northwest of Banshee, delivered impressive results. Moreover, its location along the potential strike extension of the Banshee structure suggests significant exploration upside.

• 7.26g/t Au and 1.81g/t Au from separate mullock pile samples
• Located along potential strike extension of Banshee structure

Additional High-Grade Results Along Strike

Surface sampling westward from the Banshee pit returned multiple high-grade intercepts. Consequently, these results demonstrate the district-scale potential of the mineralised system.

• 2.85g/t Au + 125.0g/t Ag + 1.09% Sb from mullock pile
• 0.98g/t Au + 121.0g/t Ag from pegmatite vein outcrop
• 0.99g/t Au + 45.4g/t Ag from additional mullock sampling

Understanding Antimony: The Critical Metal Driving Strategic Interest

What is Antimony and Why Does it Matter?

Antimony (Sb) is a critical strategic metal essential for flame retardants, battery technology, and military applications. Currently, China controls over 90% of global antimony supply, making new Western sources strategically valuable.

The metal trades at approximately $15,000-20,000 per tonne, making high-grade antimony deposits extremely valuable. At Coonambula, antimony occurs primarily as stibnite (Sb2S3), often associated with gold mineralisation in quartz veins.

The project's dual antimony-gold nature provides multiple revenue streams and reduces commodity risk. Historical mining at Banshee produced direct-shipping ore containing 4 tonnes of antimony from 20 tonnes of ore – indicating grades of approximately 20% antimony.

Strategic Importance in Current Market

The combination of high-grade gold and strategic antimony positioning creates a unique value proposition. Furthermore, current global supply chain concerns and Western government initiatives to secure critical mineral supplies enhance this positioning.

This dual-commodity approach strengthens the investment case for the gold discovery at Dart Mining. In particular, it provides exposure to both precious metals upside and strategic minerals demand.

Building on Exceptional Drilling Results

Previous Drilling Highlights Validate Surface Sampling

The report referenced Dart Mining's initial drilling programme, which has already delivered outstanding results that support the surface sampling findings. However, these drilling results demonstrate consistent high-grade mineralisation at depth.

CBADD001 Highlights:

• 5.0m @ 4.33% Sb + 1.69g/t Au + 23.65g/t Ag from 41.5m
• Including 0.65m @ 32.20% Sb + 2.91g/t Au from 42.0m
• 1.6m @ 9.47% Sb + 0.35g/t Au from 68.2m

CBADD002 Highlights:

• 6.5m @ 5.1g/t Au + 0.15% Sb from 180.0m
• Including 0.5m @ 18.30g/t Au from 184.5m
• 1.5m @ 7.32g/t Au from 182.5m

Historical Results Support District Potential

Previous exploration across the broader project has consistently returned exceptional grades. Moreover, these results span multiple decades, demonstrating the enduring potential of the district.

• Rock chips up to 65.3% Sb and 17.0g/t Au
• Drilling results including 3m @ 9.18% Sb and 6m @ 5.12% Sb & 1.55g/t Au
• Surface trenching: 4m @ 3.09g/t Au and 1.14% Sb

Strategic Location in Proven Gold District

The Coonambula Project sits in an exceptional location within Queensland's proven mineral belt. In addition, its proximity to established mining operations provides significant infrastructure advantages.

• 70km southeast of the multi-million-ounce Cracow gold mine
• 25km southwest of the historic Eidsvold goldfield
• 390km north-northwest of Brisbane by road
• 282 sq.km of granted exploration permits

The project lies within the New England Fold Belt geology, which hosts high-grade quartz veins at similar deposits including Hillgrove and Wild Cattle Creek in NSW. This geological setting is renowned for intrusion-related gold systems with exceptional grades.

Upcoming Catalysts and Development Timeline

Immediate Catalysts (Q1 2026)

February 2026: Complete diamond drilling assay results from 2025 programme expected. Furthermore, multiple drill holes completed around Banshee area will guide resource estimation and expansion drilling.

Results will provide crucial data for resource estimation and guide future drilling programmes across the broader district.

Medium-Term Development Milestones

Q1-Q2 2026:

1. IP Survey completion and interpretation
2. Continued drilling of Banshee antimony trend
3. Refined drill planning based on geophysical results
4. 3D geological modelling and JORC resource declaration

Strategic Expansion:

• 5km prospective antimony zone with historical mines on both sides of Banshee
• Individual high-grade shoots interpreted as 30-100m strike length each
• Potential for multiple discovery zones across the district

Why Should Investors Follow Dart Mining?

Unique Strategic Position

Dart Mining has secured access to one of Queensland's most prospective antimony-gold districts through its farm-in agreement with Great Divide Mining. The combination of high-grade gold, strategic antimony, and district-scale potential creates a compelling investment thesis.

However, what sets this project apart is the systematic approach to exploration and the exceptional grade continuity demonstrated across multiple prospects.

Exceptional Grade Profile

The consistently high grades across multiple prospects demonstrate genuine world-class potential. Furthermore, these grades are supported by systematic sampling and drilling programmes.

• Surface grades exceeding 10g/t gold
• Antimony grades reaching 65% Sb
• Systematic drilling confirming grade continuity
• Multiple prospects across 5km strike length

Proven Execution Track Record

Under Managing Director James Chirnside's leadership, Dart Mining has demonstrated a systematic exploration approach. In addition, the company has maintained clear communication with shareholders throughout the exploration process.

• Methodical sampling and drilling programmes
• Professional geological interpretation
• Clear development pathway toward resource definition

Market Opportunity in Critical Minerals

The current focus on critical minerals and supply chain security positions antimony as a strategic metal of increasing importance. Combined with high-grade gold mineralisation, Coonambula offers exposure to both precious metals upside and strategic minerals demand.

This gold discovery at Dart Mining represents a significant development in the company's exploration portfolio. The combination of high-grade gold (up to 10.45g/t), strategic antimony content (up to 65%), and systematic exploration approach positions this as one of Australia's most compelling critical minerals plays.

"Investment Takeaway: Dart Mining has established itself as a major player in Queensland's antimony-gold sector, with exceptional grades confirmed across multiple prospects spanning a 5km trend. With complete drilling assays expected in February 2026 and clear pathway to resource definition, this gold discovery at Dart Mining warrants close investor attention."

Key Tracking Points:

• February 2026: Complete drilling assay results
• Q2 2026: JORC resource estimation
• Ongoing: Expansion drilling across district-scale targets
• Strategic value: Critical antimony supply in Western-controlled jurisdiction

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