Locksley Resources Diamond Drilling Commences at Desert Antimony Mine

BY WILLIAM HADRIAN ON FEBRUARY 23, 2026

Locksley Resources Ltd

  • ASX Code: LKY
  • Market Cap: $60,882,326
  • Shares On Issue (SOI): 368,983,795
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    Locksley Resources Fires Up Diamond Drilling at High-Grade Desert Antimony Mine

    Locksley Resources diamond drilling at Desert Antimony Mine has officially commenced, marking a pivotal moment for the company's critical minerals strategy. The drill rig is now operational at what represents one of the few high-grade antimony projects within the United States, targeting extensions of known mineralisation that has already delivered weighted average grades up to 25.7% Sb.

    This drilling programme comes at a strategically critical time, with antimony designated as a critical mineral by the US Government and domestic production severely limited. The company's mine-to-market approach, supported by partnerships with Rice University and US Department of Energy programmes, positions Locksley to potentially reshape America's critical minerals supply chain.

    Key Programme Highlights:

    • Diamond drilling targeting high-grade stibnite mineralisation extensions
    • Surface mapping during site preparation confirmed primary vein geometries
    • Programme fully funded and aligned with US critical minerals priorities
    • Live webinar scheduled for February 25th at 1pm AEDT

    Strategic Foundation Built on Strong Technical Work

    The commencement of drilling follows months of intensive technical validation that has significantly strengthened the geological understanding of DAM. During recent earthworks and site preparation, the geology team conducted detailed surface exposure mapping that provided critical validation of the structural framework previously interpreted from underground surveys.

    This surface work has been game-changing for drill targeting confidence. By directly observing stibnite veins in bedrock exposures, the team confirmed the orientation and continuity of the primary mineralised veins. Furthermore, this validation allows for precision targeting of faulted extensions of the high-grade lodes.

    Technical Validation Results:

    Component Details
    High-Grade Sampling Weighted average grades up to 25.7% Sb
    Geological Mapping Underground structural mapping completed
    Surface Validation Primary vein geometries confirmed through exposure mapping
    Drill Optimisation Enhanced targeting confidence through integrated geological data

    Managing Director Kerrie Matthews: "Commencing drilling at DAM reflects our strong technical foundation and focus on high-confidence targets. This Project can underpin near-term U.S. antimony supply via our pilot plant initiative."

    Understanding Stibnite: The Key to Antimony Production

    Stibnite is the primary ore mineral of antimony, with the chemical formula Sb₂S₃. This metallic-looking mineral typically forms in hydrothermal vein systems and is the most important commercial source of antimony globally.

    For investors, stibnite's significance lies in its direct conversion to antimony metal and compounds used in critical applications. These applications include flame retardants, lead-acid batteries, and defence materials. In addition, the high-grade nature of DAM's stibnite mineralisation is particularly valuable, as it reduces processing complexity and costs whilst maximising recovery rates.

    Why Stibnite Matters to Investors:

    • Direct pathway to antimony production
    • High-grade deposits like DAM offer superior economics
    • Critical for flame retardants, defence, and advanced materials
    • Limited global supply creates strong pricing dynamics

    The mineral forms distinctive metallic grey crystals and is relatively soft compared to other metallic ores. When processed, stibnite yields antimony trioxide, which serves as a crucial flame retardant in plastics, textiles, and electronic components. Consequently, the strategic importance of antimony has led to its classification as a critical mineral, with governments recognising its essential role in national defence and industrial applications.

    Drilling Programme Targets and Objectives

    The diamond drilling programme has been meticulously designed based on the comprehensive geological understanding developed through historical mining data, recent underground mapping, and surface sampling results. The programme focuses on priority targets at and immediately below the historic Desert Antimony Mine workings.

    Primary Drilling Objectives:

    1. Depth and Strike Extensions – Target high-grade mineralised system extensions beyond historical workings
    2. 3D Geological Integration – Test targets identified through historical mining and recent geological modelling
    3. Structural Architecture – Enhance understanding of geology and key mineralisation characteristics
    4. Resource Expansion – Identify additional high-grade antimony mineralisation along strike
    5. Metallurgical Support – Generate drill core for processing test work with university partners

    The strategic approach of testing extensions rather than just confirming known mineralisation positions Locksley for potential resource growth. However, this precision targeting is expected to be a primary driver for rapid resource expansion as the system is further defined.

    According to the company's announcement, drilling operations commenced following successful site establishment activities, which included necessary earthworks and construction of drill pads. Moreover, the technical team utilised this preparation phase to conduct detailed surface exposure mapping, providing critical geological data that confirmed the orientation and continuity of primary stibnite veins at surface.

    Critical Minerals Strategy Gains Momentum

    Antimony's designation as a critical mineral by the US Government creates a compelling investment backdrop for DAM. With limited current domestic production, the project represents a rare opportunity to establish a primary, high-grade antimony source within the United States. This aligns directly with national security and defence supply chain priorities.

    The timing couldn't be more strategic. Locksley Resources diamond drilling at Desert Antimony Mine is progressing alongside downstream metallurgical test work. Representative material is being supplied to Rice University and Department of Energy programmes under the Critical Materials Innovation Hub. This integrated approach combines resource development with innovative processing technologies, positioning the company at the forefront of US critical minerals independence.

    Strategic Advantages:

    Factor Benefit
    Critical Mineral Status Government support and supply chain priority
    Domestic Location Reduced geopolitical risk and logistics costs
    High-Grade Resource Superior project economics and processing efficiency
    University Partnerships Access to cutting-edge research and development
    Defence Applications Stable, high-value end markets

    The United States currently imports approximately 90% of its antimony requirements, primarily from China. This dependency has raised significant concerns among policymakers, particularly given antimony's critical role in defence applications. For instance, it's essential in flame retardants and advanced materials manufacturing. DAM represents one of the few advanced antimony projects capable of addressing this supply gap.

    Next Steps and Upcoming Catalysts

    Locksley has outlined a clear roadmap that extends well beyond the current drilling programme. This demonstrates a comprehensive mine-to-market strategy that could position the company as a major player in US critical minerals supply.

    Immediate Catalysts:

    • Progressive reporting of drill assay results as received and validated
    • Commencement of drilling at El Campo rare-earth element project
    • Continued metallurgical test work for trioxide product development
    • Advanced permitting for additional underground sampling
    • Design and construction tender for pilot processing plant

    The company's upcoming investor webinar on February 25th provides an opportunity for shareholders to gain deeper insights. The strategic plan and progress at the Mojave Critical Minerals Project will be discussed. The webinar is scheduled for 1:00pm AEDT / 10:00am AWST, with Managing Director Kerrie Matthews providing updates on key developments across the company's portfolio.

    According to the announcement, drilling will focus initially on priority targets at and immediately below the historic Desert Antimony Mine workings. Furthermore, the company aims to integrate data from surface bedrock exposures revealed during earthworks with historical mining records and recent geological modelling to optimise drill targeting accuracy.

    What Makes This Project Unique in the Market?

    Locksley Resources diamond drilling at Desert Antimony Mine stands out in the critical minerals sector due to several unique factors. The project combines proven high-grade mineralisation with strategic government alignment and innovative downstream partnerships.

    The mine-to-market approach differentiates Locksley from exploration-only peers, whilst the integrated strategy addresses the entire value chain. This encompasses resource development through processing and supply chain integration. Additionally, the company's partnerships with leading research institutions provide access to cutting-edge metallurgical expertise.

    The geological setting at DAM is particularly favourable, with historical mining having already proven the presence of high-grade stibnite veins. However, the current drilling programme targets extensions of this known mineralisation, potentially expanding the resource base significantly.

    The project's California location provides additional advantages, including established mining infrastructure and skilled workforce availability. Moreover, proximity to key end markets on the US West Coast could significantly reduce development costs and timeline compared to more remote locations.

    Investment Thesis: Positioned for Critical Minerals Growth

    Locksley Resources presents a compelling investment opportunity at the intersection of resource development and strategic US supply chain initiatives. The combination of high-grade mineralisation, strategic government alignment, and innovative downstream partnerships creates multiple value drivers for investors.

    Key Investment Drivers:

    • High-grade resource potential with proven mineralisation up to 25.7% Sb
    • Strategic timing aligned with US critical minerals independence initiatives
    • Integrated approach combining mining, processing, and technology development
    • Government support through critical mineral designation and research partnerships
    • Limited domestic competition in US antimony production

    The fully funded drilling programme removes near-term capital risk whilst the company advances toward resource definition and pilot plant development. With antimony's critical applications in defence, flame retardants, and advanced materials, DAM could become a cornerstone asset in America's critical minerals infrastructure.

    Consequently, the project's strategic importance extends beyond typical mining investments, as it addresses national security concerns and supply chain vulnerabilities. This positioning could lead to additional government support and strategic partnerships in the future.

    Why Investors Should Follow Locksley Resources

    Locksley Resources has positioned itself as a potential major player in US critical minerals supply, with significant upside potential driven by strategic government alignment. The high-grade resource potential and innovative downstream partnerships further enhance this positioning. The company's mine-to-market approach differentiates it from exploration-only peers, whilst the Desert Antimony Mine offers a rare combination of high-grade mineralisation and strategic importance.

    With Locksley Resources diamond drilling at Desert Antimony Mine now underway and multiple catalysts approaching, investors should closely monitor the company's progress. These catalysts include assay results and rare earth element drilling commencement. The company's integrated strategy addresses the entire value chain from resource development through processing and supply chain integration.

    The technical foundation established through historical mining data, underground mapping, and recent surface validation provides confidence in the geological model. This comprehensive understanding, combined with the strategic importance of domestic antimony production, creates a compelling investment narrative for the critical minerals sector.

    Key Takeaway:
    Locksley Resources has positioned itself as a major player in US critical minerals supply, with significant upside potential driven by high-grade antimony mineralisation and strategic government partnerships. With drilling now operational and multiple upcoming catalysts, investors should keep a close eye on this emerging critical minerals story.

    Could Locksley Resources Transform US Critical Minerals Supply?

    With diamond drilling now operational at the high-grade Desert Antimony Mine and multiple upcoming catalysts on the horizon, Locksley Resources presents a compelling investment opportunity in the rapidly evolving critical minerals sector. The company's unique mine-to-market strategy, combined with proven high-grade mineralisation up to 25.7% Sb and strategic government partnerships, positions it at the forefront of America's critical minerals independence initiative. To explore how Locksley's integrated approach to resource development and processing innovation could deliver significant value for investors, and to stay updated on drill results and project developments, visit the company's website for comprehensive investor information and upcoming webinar details.

    Stock Codes: ASX: LKY

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