Mt Clement Drilling Hits Visible Antimony in Four Holes, Resource Expansion Underway

Visible Antimony Confirmed in Early Drilling

Black Cat Syndicate Limited (ASX, BC8) has revealed encouraging early results from its ongoing drilling program at the Mt Clement Antimony Project in Western Australia. The first four diamond drill holes, totaling 727 metres, have all intersected visible antimony mineralisation within quartz-sulphide stockwork veins. This marks a significant milestone in exploring what is already one of Australia’s largest and highest-grade antimony deposits.

While assay results are still pending and expected in November 2025, on-site XRF core scanning using the Veracio TrueScan system has qualitatively confirmed the presence of antimony mineralisation in zones up to 14 metres wide (downhole), indicating substantial mineralised widths.

Resource and Exploration Potential

Mt Clement currently hosts a JORC-compliant resource of 13.2 kilotonnes at 1.7% antimony, with credits for associated gold, silver, and lead. Beyond this, the company has defined an exploration target ranging from 47 to 103 kilotonnes at grades between 1.2% and 1.9% antimony. However, this target remains conceptual pending further drilling and assay confirmation.

The deposit lies on granted mining leases approximately 30 kilometres from Black Cat’s Paulsens Gold Operation, benefiting from proximity to existing infrastructure and within the Northern Australia Infrastructure Facility zone, which prioritises critical minerals development.

Accelerated Drilling and Project Management

To expedite progress, Black Cat has mobilised two additional diamond rigs, focusing on completing two Exploration Incentive Scheme (EIS) co-funded drill holes designed to test multiple lodes and the depth extent of mineralisation. Additional infill and extensional drilling is also planned to refine the resource.

Complementing these operational efforts, John Burgess has been appointed Project Manager for Mt Clement. With over 45 years of experience in base and precious metals operations, design, and construction, Burgess will oversee technical advancement, statutory approvals, and commercial partnerships, aiming to fast-track the project amid strong antimony demand and pricing.

Metallurgical and Economic Studies Underway

Previous metallurgical test work indicated favourable recoveries of approximately 85% for antimony and lead, and 92% for silver. Black Cat plans further metallurgical testing as part of ongoing studies to evaluate processing options, including potential integration with the Paulsens flotation circuit.

An economic study incorporating resource, metallurgy, mining, and processing considerations is targeted for completion in the September 2026 quarter, providing a clearer picture of the project’s commercial viability.

Strategic Importance of Mt Clement

Mt Clement’s development aligns with Black Cat’s broader strategy to deliver “More Gold (and Antimony), Sooner,” leveraging its portfolio of gold and critical minerals assets. The project’s location near Paulsens and within a government-supported infrastructure zone enhances its strategic value amid growing global demand for antimony, a critical mineral used in flame retardants, batteries, and other industrial applications.

As drilling continues through November 2025, the market awaits assay results that will help define the next phase of resource expansion and project development.