Duketon Mining Commences Maiden Drilling at Barlee Gold Project

Duketon Mining Kicks Off Historic First Drilling Campaign at Barlee Gold Project

Duketon Mining Limited (ASX: DKM) has commenced its maiden drilling program at the Duketon Mining Barlee Gold Project, marking a significant milestone for the Western Australian gold explorer. The company is testing multiple high-grade gold-in-soil anomalies across six high-priority prospects, with the 5,500-metre program representing the first drilling activity ever conducted on these targets.

The program combines 4,000 metres of aircore drilling and 1,500 metres of reverse circulation (RC) drilling to systematically test large-scale anomalies identified through the company's 2025 geochemical sampling program. With 400 metres already completed at the Scooby Prospect, early geological observations show promising sheared mafic and felsic lithologies.

Furthermore, management has expressed considerable optimism about the exploration potential. "This is an exciting phase for the Company. This program represents the first drilling of any description across these prospects," stated Stuart Fogarty, Managing Director. "Success at any one of these targets would be highly significant, and given the scale and number of anomalies identified, we believe there is high probability for a new gold camp to emerge at Barlee."

Six High-Priority Targets Define Exploration Strategy

The drilling program systematically targets six prospects within the Archean Diemals Formation and Marda Complex, each defined by substantial gold-in-soil anomalies. The strategic positioning of these targets demonstrates the comprehensive nature of the Duketon Mining Barlee Gold Project.

The strategic positioning of five prospects within the Diemals Formation near the domain-bounding Clampton Fault provides compelling geological context. This late basin formation comprises clastic metasedimentary rocks spanning approximately 40 kilometres long and 15 kilometres wide, offering substantial exploration potential.

In addition, the Astro Prospect ranks as the highest priority target, defined by its 1,800m × 800m gold anomaly that remains open along strike and under cover. This represents a significant opportunity within the broader Duketon Mining Barlee Gold Project exploration strategy.

What Makes Gold-in-Soil Anomalies So Important for Discovery?

Gold-in-soil sampling represents one of the most cost-effective methods for identifying potential gold mineralisation beneath surface cover. This technique measures trace amounts of gold (measured in parts per billion – ppb) that have migrated upward from buried ore bodies through weathering and geological processes.

The process works when weathering breaks down gold-bearing rocks deep underground. Tiny gold particles and dissolved gold compounds slowly move upward through soil and rock fractures over thousands of years. These traces accumulate in surface soils, creating detectable signatures that exploration geologists can map.

Why this matters for investors: Anomalies exceeding 20-50ppb gold often indicate significant mineralisation potential below. The Duketon Mining Barlee Gold Project anomalies range from 37ppb to 235ppb, with several prospects showing values 4-12 times typical threshold levels.

The large size of these anomalies (up to 1,800m × 800m) suggests potential for substantial gold systems rather than isolated occurrences. When multiple neighbouring anomalies show elevated values, this often suggests a large mineralised zone or multiple connected deposits.

Geological Setting Supports Discovery Potential

The Duketon Mining Barlee Gold Project sits within the Marda-Diemals Greenstone Belt, a geological environment known for hosting significant gold deposits throughout Western Australia's goldfields. These ancient volcanic and sedimentary rock sequences, formed over 2.5 billion years ago, provide the structural framework for major gold mineralisation.

However, several key geological advantages distinguish this project:

• Proximity to Clampton Fault: Major structural control providing fluid pathways for gold-bearing solutions

• Archean age rocks: Proven host lithologies for world-class gold deposits across Western Australia

• Multiple rock types: Both mafic (iron-rich volcanic rocks) and sedimentary units increase discovery probability

• Banded Iron Formation (BIF): Present at Odie Prospect, commonly associated with gold mineralisation globally

Understanding the Geological Framework

The Diemals Formation's clastic metasedimentary composition represents rocks formed from ancient sediments that have been compressed and heated over geological time. This 40km × 15km footprint provides extensive exploration potential beyond current targets.

Moreover, the Clampton Fault represents a major geological structure that likely provided pathways for gold-bearing fluids during ancient hydrothermal events. These fault systems often control gold distribution across entire regions, making proximity to such structures highly favourable for exploration.

Structural controls play a crucial role in gold deposit formation. The sheared lithologies observed in early drilling indicate structural deformation that often controls gold mineralisation, making them highly prospective targets.

Dual-Project Progress Accelerates Near-Term Catalysts

While the Duketon Mining Barlee Gold Project maiden program captures headlines, Duketon maintains momentum across its portfolio. This diversified approach provides multiple opportunities for value creation.

Boodanoo Project Update:

• 800 metres of RC drilling completed across twelve holes

• All samples dispatched to laboratories

• Assay results expected within 4-6 weeks

This dual-project approach provides multiple near-term catalysts over the coming months, with Boodanoo results potentially preceding Barlee outcomes. The strategic timing allows investors to monitor progress across two distinct geological environments.

Furthermore, the completion of Boodanoo drilling demonstrates Duketon's operational capability and systematic approach to exploration. Laboratory processing typically requires 4-6 weeks for comprehensive assay analysis, meaning results should be available before significant progress at Barlee.

Investment Thesis: First-Mover Advantage in Untested Territory

The Duketon Mining Barlee Gold Project represents a compelling investment opportunity based on several key factors. For instance, the scale and quality of targets provide exceptional exploration potential.

Scale and Quality of Targets:

• Six high-priority prospects with substantial anomalies covering extensive areas

• Peak values up to 235ppb gold indicating strong mineralisation potential

• Large anomaly footprints suggesting significant system potential rather than isolated deposits

Geological Validation:

• Archean greenstone belt setting with proven gold endowment regionally

• Structural controls via proximity to Clampton Fault providing fluid pathways

• Multiple lithological units increasing discovery probability across varied rock types

Exploration Upside and Timeline Advantages

Exploration Upside:

• First-ever drilling on these prospects providing genuine discovery potential

• 5,500-metre program provides comprehensive initial testing across all targets

• Multiple prospects reduce single-target risk whilst maximising discovery opportunity

Timeline Advantages:

• Program already commenced with early progress at Scooby Prospect

• Systematic approach across multiple targets ensuring thorough evaluation

• Near-term catalysts from both Barlee and Boodanoo projects providing regular updates

In addition, the combination of large-scale anomalies, favourable geology, and first-ever drilling provides significant discovery potential in Western Australia's proven gold province.

Technical Drilling Program Details

The 5,500-metre program employs two complementary drilling methods, each designed to optimise exploration efficiency and effectiveness. This systematic approach ensures comprehensive evaluation of all targets.

Aircore Drilling (4,000 metres):

• Cost-effective method for initial target testing

• Provides geological information and preliminary grade data

• Suitable for testing large areas efficiently

• Generates samples through compressed air circulation

Reverse Circulation Drilling (1,500 metres):

• Higher precision method for detailed target evaluation

• Superior sample quality and contamination control

• Used for follow-up of promising aircore results

• Provides reliable geological and grade information

Current Progress and Early Observations

The program commenced at Scooby Prospect with ten holes completed to date, totalling 400 metres of the planned program. Early geological observations show promising sheared mafic and felsic lithologies.

Sheared lithologies represent rocks that have been fractured and deformed by tectonic forces. These structural features often provide pathways for gold-bearing fluids and can concentrate mineralisation, making them highly prospective targets for exploration.

However, comprehensive assay results will be required to determine the significance of these early geological observations. The systematic drilling approach ensures thorough evaluation of each prospect's potential.

Why Should Investors Monitor Duketon Mining?

The commencement of the Duketon Mining Barlee Gold Project drilling program positions Duketon Mining as a compelling exploration story with several unique advantages. These factors combine to create exceptional investment appeal.

First-Mover Advantage: This represents the first drilling across multiple high-grade anomalies, providing genuine discovery potential in an underexplored region. Most targets have no historical drilling, enhancing discovery probability.

Quality Target Portfolio: Six prospects with gold-in-soil values ranging from 37ppb to 235ppb offer multiple opportunities for discovery success. This approach reduces single-target dependence significantly.

Proven Geological Setting: The Marda-Diemals Greenstone Belt's Archean geology provides the foundation for significant gold systems. Regional success supports exploration rationale comprehensively.

Multiple Catalysts Drive Investment Appeal

Multiple Catalysts: With Boodanoo assays due in 4-6 weeks and Barlee drilling progressing systematically, investors can expect regular newsflow over the coming months. This provides sustained market interest.

Systematic Exploration Approach: The 5,500-metre program provides comprehensive initial testing rather than cursory evaluation. This offers thorough assessment of discovery potential across all targets.

Strategic Project Scale: The 40km × 15km Diemals Formation footprint suggests substantial exploration potential beyond current targets. This provides long-term expansion opportunities for successful discoveries.

The combination of untested high-grade anomalies, favourable geological setting, and systematic exploration approach makes Duketon Mining compelling for investors seeking exposure to genuine discovery potential. Success at any of the six prospects could significantly revalue the company.

Furthermore, the multiple-target approach reduces exploration risk typically associated with single-prospect explorers. This strategic diversification enhances the overall investment proposition within Australia's premier gold mining jurisdiction.

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