Antimony – Palmerville EPM Package Overview

The Palmerville EPM package hosts multiple historical and prospective antimony occurrences within a large, contiguous tenure position located in a proven mineralised district. While historical exploration across the Palmerville region has largely focused on gold, copper and associated base metals, antimony was not systematically targeted by previous explorers despite the presence of recorded antimony mines, workings and geochemical indications across several EPMs.

Antimony mineralisation within the Palmerville EPM package is interpreted to be part of an orogenic gold–antimony system, consistent with regional structural controls and vein-hosted hydrothermal mineralisation recognised throughout the district. This interpretation is supported by historical records, prior technical disclosures, and satellite-based hyperspectral studies undertaken by previous tenement holders, which identified regolith and structural signatures prospective for antimony alongside gold and copper.

Antimony within the Palmerville region commonly occurs in structurally controlled vein systems and is frequently associated with polymetallic assemblages including gold, lead, tin and copper sulphides. These mineralisation styles are consistent with those documented elsewhere in the broader Palmerville and Palmer River mineral fields.

Antimony is classified as a critical mineral with applications in flame retardants, energy storage, specialty alloys and electronics. Global supply remains highly concentrated, and increasing demand has heightened strategic interest in new, geopolitically secure sources. The Palmerville EPM package provides a rare opportunity to assess multiple antimony prospects within a single, scalable exploration portfolio, with further detail on individual EPMs outlined in the sections below.

Early exploration across the Palmerville EPM package identified antimony as a constituent of the regional mineral system during work undertaken by AMAD under Authority to Prospect (A to P) 430M in 1969 and later by Lamadec Exploration under A to P 797M in 1971. While initial exploration programs were primarily focused on base metals, including copper (Cu), lead (Pb), and zinc (Zn), regional geochemical sampling across a belt extending from the Palmer River to areas north of Fairlight highlighted multiple anomalous zones. These anomalies, including those associated with antimony mineralisation, were not systematically followed up at the time, reflecting the exploration priorities, analytical limitations, and commodity focus of the period rather than an absence of mineral potential.

Subsequent limited drilling at an identified antimony prospect within what is now EPM 27396 confirmed the presence of antimony mineralisation, although the work did not delineate a resource considered economically viable under the prevailing market conditions and technical understanding at that time. The identification of this antimony occurrence is considered geologically significant and represents another historical confirmation of antimony within the broader Palmerville EPM package. 

EPM 26891 – PALMERVILLE NORTH

Of particular interest to Diversified Mining and Resouces is a small section of high-grade gold and Antimony mineralisation known as Balterra Reef, which is located just east of EPM 26891. Sipa Resources collected several rock chip samples from the Balterra Reef, and the gold geochemistry is mapped as a linear feature on the south bank of the Palmer River which trends towards EPM 26891. 

EPM 26891 covers an area of 207km2 and lies in the north-western end of the Palmerville Project tenements. Previous exploration and mining have concentrated on alluvial gold, the Sipa Balterra prospect being the main target. Sipa Resources drill-tested gold-bearing quartz veins during 2004 with 10 RC holes. The company believed that further exploration was warranted. Gold mineralisation occurs inquartz veins with associated arsenic, lead, bismuth and antimony within the Proterozoic rocks of the Yambo Inlier to the west of the Palmerville Fault. The mineralised zone trends towards the small historic Fernhill Bend gold workings located immediately west of EPM 26891 on the southern edge of the Palmer River.

Further confirmation of antimony within the Palmerville Project area is documented in historical soil sampling completed by Cyprus Australia Ltd over what is now Diversified Mining and Resources Pty Ltd’s EPM 27912 (Cattle Creek), as referenced in the Annual Report for the period ending 6 April 2025. These historical antimony soil results represent an additional occurrence within the Palmerville EPM package and reinforce the interpretation that antimony mineralisation is regionally developed rather than isolated. Collectively, the Woods Peak and Cattle Creek datasets support a district-scale antimony system linked to major fault structures, validating the prospectivity of the Palmerville EPM package for antimony when reassessed using modern geochemical techniques, refined structural interpretation, and contemporary critical-mineral market conditions.

EPM26893 - PALMERVILLE WEST 

In 2021, NMR contracted Dirt Exploration to acquire and review the publicly available SWIR/LWIR Sentinel-2 satellite imagery and develop hyperspectral imagery maps for the potential for copper, gold and antimony in the regolith over the entire Palmerville project area. The hyperspectral image for Cu shows an anomalous zone that extends from west of Mountain creek prospect to south of Boomerang Creek (Figure 3), and shows a hyperspectral hot spot at the Boomerang Creek prospect. The hyperspectral image for gold shows a large anomaly at the top of the western section of EPM 26893.

Figure 7 and Figure 8 below identify Antimony Sb prospects. these prospects will be further investigated as part of the antimony portfolio process.