OD6 Metals Fluorspar Results Exceed 75% CaF2 at Horseshoe Prospect

OD6 Metals Delivers Exceptional 75% CaF2 Fluorspar Results at Horseshoe Prospect

OD6 Metals Limited (ASX: OD6) has delivered outstanding channel sampling results from its Horseshoe Prospect within the Quinn Fluorspar Project in Nevada. The OD6 Metals fluorspar results showcase ultra-high-grade intercepts reaching 75% CaF2 and confirm the presence of a substantial fluorspar mineralisation system.

The latest systematic channel sampling has revealed exceptional grade continuity across exposed outcrops. Three significant intercepts demonstrate the commercial potential of this emerging fluorspar district.

The results validate historical production grades and confirm strong high-grade fluorspar continuity across the 3,000m² mapped system. Furthermore, significant exploration upside remains as mineralisation extends along strike and at depth.

Understanding Channel Sampling: A Critical Validation Technique

Channel sampling represents a systematic geological technique that provides more reliable grade assessment than selective rock chip sampling. At Horseshoe, samples were collected at 1-metre intervals across three different exposures. This approach ensures reduced sampling bias and representative grade profiles across the mineralised zone.

This sampling method mimics early-stage mining scenarios, making it a robust indicator of potential economic mineralisation. The strong consistency of grades across the channels highlights the homogeneous nature of the breccia-hosted fluorite system. This represents a highly positive indicator for future exploration and resource definition.

For fluorspar projects, channel sampling is particularly valuable as it demonstrates grade continuity essential for Direct Shipping Ore (DSO) operations. Additionally, it validates conventional upgrading processes. The technique involves marking lines across mineral exposures and collecting representative samples at regular intervals.

Channel sampling differs from random rock chip sampling by following predetermined lines across mineralisation. This approach reduces selection bias and provides more reliable data for resource assessment. The systematic methodology is particularly important for fluorspar deposits where grade distribution can vary significantly across short distances.

What Makes These Results Exceptional?

The OD6 Metals fluorspar results demonstrate exceptional commercial-grade mineralisation:

• 12m @ 68.9% CaF2 including a peak value of 79.7% CaF2
• 7m @ 73.1% CaF2 including a peak value of 82.0% CaF2
• 2m @ 75% CaF2 including a peak value of 79.9% CaF2

The Horseshoe Prospect sampling programme targeted exposed outcrops within existing historic pits. Previous small-scale mining operations extracted approximately 26,000 tonnes of material during the 1950s and 1960s. However, the current results validate this historical production and demonstrate substantial remaining mineralisation.

The mineralisation occurs within a breccia/replacement style system hosted in Paleozoic limestones and dolomites. These rocks have been altered by epithermal activity from Cenozoic volcanism. Geological indicators suggest the surface expression represents a potentially larger mineralised system extending under silicified cap rock.

Commercial Implications

"Grades of this level support Direct Shipping Ore (DSO) as MetSpar, while also offering a clear and efficient pathway to AcidSpar quality (>97% CaF₂)," said Brett Hazelden, Managing Director.

The grades observed fall well within metallurgical-grade fluorspar specifications. This supports either direct shipping operations or efficient upgrading to high-purity AcidSpar for specialised industrial applications. MetSpar typically requires fluorspar content of 60-85% CaF2. In contrast, AcidSpar demands >97% CaF2 for chemical industry applications.

The breccia-hosted nature of the mineralisation indicates that fluorspar formation occurred when existing limestone was fractured and replaced by fluorite-bearing solutions. This geological setting often produces extensive, high-grade mineralisation systems suitable for bulk mining operations.

Strategic Context: Critical Mineral in High-Demand Market

The Quinn Fluorspar Project's exceptional grades occur within a highly strategic market context. The United States currently imports 100% of its fluorspar requirements, with 68% sourced from China according to USGS data. Fluorspar's designation as a Critical Mineral reflects its essential role in several key industries.

Fluorspar (fluorite, CaF2) serves as the primary source of fluorine for industrial applications. The mineral is processed into hydrofluoric acid, which is essential for manufacturing semiconductors, pharmaceuticals, and specialised chemicals. Moreover, high-purity fluorspar is used directly in aluminium and steel production as a flux to lower melting temperatures.

The critical nature of fluorspar stems from its unique chemical properties and limited global supply sources. China's dominance in fluorspar production has created supply chain vulnerabilities for Western nations. This is particularly concerning for strategic industries requiring high-purity materials.

The project's location approximately 300km by road from the US Strategic Minerals Reserve at Hawthorne, Nevada, positions it strategically within domestic supply chains. Furthermore, Nevada's ranking as second in the 2025 Fraser Institute's Mining Attractiveness Index provides additional jurisdictional advantages.

Key Applications Include:

• Advanced battery technologies and energy storage systems
• AI semiconductor chip etching processes
• Nuclear fuel processing applications
• Aerospace and defence technologies

District-Scale Potential

The Horseshoe results complement recently reported high-grade assays from the nearby Mammoth Prospect (30-50% CaF2). This reinforces district-scale potential across the broader fluorspar system. Combined, the prospects cover over 12,000m² of mapped mineralisation with multiple untested zones remaining.

How Does OD6 Plan to Expand This Success?

OD6's upcoming field activities will systematically target remaining untested zones as part of its comprehensive due diligence programme. The company's planned exploration activities include several immediate priorities and medium-term objectives.

Immediate Priorities:

• Expand systematic channel and rock chip sampling across untested outcrop zones
• Complete detailed geological and structural mapping of the full system
• Undertake soil geochemistry programmes to define mineralisation extensions

Medium-Term Objectives:

• Identify and prioritise drill targets based on surface mapping
• Initiate permitting processes for maiden drilling programmes
• Progress metallurgical testwork planning for DSO and upgrading pathways

The systematic approach involves targeting the approximately 25m of unmapped outcrop on the main face at Horseshoe. Mineralisation continues beyond the current sampling extent. Additionally, prospects within the broader Quinn Project area remain untested, with historical rock chip results reporting up to 94% CaF2.

The company indicated potential to apply for Fast 41 Status, which could provide accelerated permitting support for early mining operations. However, this represents a pathway rather than confirmed designation.

Metallurgical testwork will focus on determining optimal processing routes for both direct shipping ore and upgrading scenarios. The high grades achieved in channel sampling suggest minimal processing may be required to achieve MetSpar specifications. Nevertheless, upgrading to AcidSpar quality would involve conventional flotation and chemical processing techniques.

Investment Thesis: Exceptional Grades Meet Strategic Market Position

The Horseshoe results strengthen OD6's position within the critical minerals sector, demonstrating several key investment attributes. The OD6 Metals fluorspar results provide compelling evidence of commercial-grade mineralisation in a strategically important commodity facing supply chain constraints.

Technical Excellence: Ultra-high grades averaging over 70% CaF2 across continuous intercepts validate historical production and confirm substantial remaining mineralisation. The consistency of grades across different sampling locations suggests a homogeneous mineralisation system suitable for bulk extraction methods.

Commercial Viability: Grades support multiple value propositions including DSO operations for MetSpar and efficient upgrading to premium AcidSpar specifications. The range of 68.9% to 75% CaF2 provides operational flexibility in targeting different market segments based on commodity price differentials.

Strategic Location: Nevada jurisdiction with established mining infrastructure and proximity to strategic mineral reserves provides regulatory certainty and logistical advantages. The state's mining-friendly policies and existing transport infrastructure reduce development risks and capital requirements.

District Potential: Combined Horseshoe and Mammoth prospects demonstrate district-scale mineralisation across 12,000m² with significant exploration upside. The presence of multiple fluorspar occurrences across the project area suggests a large hydrothermal system with potential for additional discoveries.

Market Positioning: Domestic fluorspar development addressing 100% import dependence in a critical mineral classified by USGS creates strategic value beyond traditional mining metrics. The growing demand from technology sectors provides long-term market support.

Understanding Fluorspar: The Forgotten Critical Mineral

Fluorspar (fluorite, CaF2) represents one of the most strategically important yet overlooked critical minerals in global supply chains. The mineral occurs naturally as calcium fluoride and serves as the primary source of fluorine for industrial applications worldwide.

Fluorspar is processed into hydrofluoric acid (HF), which is essential for numerous high-technology applications. Semiconductor manufacturing requires ultra-pure HF for etching silicon wafers and cleaning processes. The renewable energy sector uses fluorspar derivatives in lithium-ion battery electrolyte production and solar panel manufacturing.

The aerospace and defence industries rely on fluorspar-derived chemicals for specialised alloys and propellants. Nuclear fuel processing requires high-purity fluorine compounds for uranium enrichment. This makes fluorspar essential for both civilian nuclear power and defence applications.

Supply Chain Vulnerabilities

China's dominance in fluorspar production, controlling approximately 68% of global supply, has created significant supply chain risks for Western economies. The mineral's classification as a Critical Mineral by the US Geological Survey reflects concerns about import dependence in strategic industries.

Alternative supply sources remain limited, with Mexico and Mongolia providing smaller quantities. Most Western fluorspar deposits were exhausted during the 20th century. This leaves few domestic production options for North American and European consumers.

Fluorspar markets are segmented by purity levels. MetSpar (60-85% CaF2) serves metallurgical applications in steel and aluminium production. AcidSpar (>97% CaF2) commands premium pricing for chemical industry applications. Ceramic-grade fluorspar serves specialised applications in glass and ceramics manufacturing.

The growing demand for semiconductors, electric vehicle batteries, and renewable energy technologies is driving increased fluorspar consumption. Supply constraints and geopolitical considerations are supporting higher prices and increased interest in domestic production capabilities.

Why Should Investors Monitor OD6 Metals?

The combination of exceptional fluorspar grades, strategic market positioning, and systematic expansion approach positions OD6 as a compelling opportunity within the critical minerals space. The OD6 Metals fluorspar results at Horseshoe, combined with the broader district potential, demonstrate the company's ability to identify and advance high-quality mineral assets.

With the United States facing complete import dependence for fluorspar and growing demand from advanced technology sectors, domestic development projects like Quinn represent strategic value. This value extends beyond traditional mining metrics. The company's methodical approach to due diligence and exploration provides confidence in technical execution.

Key Monitoring Points:

• Expansion of channel sampling results across untested zones
• Progression toward drill targeting and maiden drilling programmes
• Metallurgical testwork results for DSO and upgrading pathways
• Permitting progress for advanced exploration activities

The systematic nature of OD6's exploration approach, combined with the exceptional grades achieved to date, suggests potential for resource definition and development scenarios. The company's focus on validating historical results while expanding known mineralisation demonstrates technical competence in advancing the project.

Near-term catalysts include expanded sampling results from untested outcrop zones and completion of detailed geological mapping. Medium-term opportunities involve drill targeting and permitting approvals for maiden drilling programmes. Longer-term value creation will depend on resource definition and feasibility studies for potential development scenarios.

"Investment Takeaway: OD6 Metals has validated exceptional fluorspar grades at Horseshoe that support commercial development pathways within a strategically important critical mineral. With substantial exploration upside across the broader Quinn Project and a systematic approach to advancement, the company warrants close attention as it progresses toward resource definition and potential development scenarios."

What's Next for OD6 Metals?

The Horseshoe results represent a significant validation of the Quinn Fluorspar Project's potential and position OD6 among Australia's most promising critical mineral development companies. As the company advances its systematic exploration programme, investors should expect continued catalyst flow from this exceptional Nevada fluorspar district.

The convergence of ultra-high grades, strategic mineral classification, and supply chain vulnerabilities creates a compelling investment thesis for OD6 Metals. The OD6 Metals fluorspar results demonstrate the project's commercial potential whilst positioning the company to benefit from growing demand for domestic critical mineral production.

The systematic exploration programme will continue expanding across untested zones within the district-scale mineralisation system. With over 12,000m² of mapped mineralisation and multiple prospects remaining untested, the Quinn Project offers significant exploration upside potential.

Furthermore, the project's strategic location in Nevada provides jurisdictional advantages for development. The state's mining-friendly policies and established infrastructure reduce development risks and capital requirements compared to many alternative jurisdictions.

The OD6 Metals fluorspar results at Horseshoe validate the project's exceptional potential whilst demonstrating the company's technical competence in advancing high-quality critical mineral assets. As the critical minerals sector continues growing, OD6's systematic approach and exceptional grades position it for significant value creation opportunities.

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