Structural Complexity at Mojave Raises Stakes for Antimony Resource Expansion

Unlocking New Exploration Frontiers at Mojave

Locksley Resources Limited (ASX, LKY) has unveiled a major breakthrough in its exploration efforts at the Mojave Project in California, with the identification of the Beefeater Shear; a substantial 10 to 15-metre wide structural corridor that mirrors the geological characteristics of the high-grade Desert Antimony Mine (DAM) system. This discovery, emerging from a comprehensive Stage III technical review and high-resolution underground mapping, significantly broadens the scope for antimony mineralisation within the project area.

The Beefeater Shear’s north-south orientation and intense goethite alteration suggest it shares the same structural timing and kinematic history as the DAM mineralised veins. This implies that the Mojave Project’s antimony deposits may not be confined to a single vein system but hosted across multiple, similarly evolved structures; a promising sign for the company’s exploration pipeline.

Decoding the Desert Antimony Mine’s Complex Vein System

In parallel, Locksley’s detailed underground mapping at the Desert Antimony Mine has shed light on the complex geometry of stibnite veins and the presence of younger east-west shears that offset the primary north-south mineralised veins. These structural displacements explain the apparent abrupt terminations of high-grade zones observed in historic workings.

By quantifying the displacement caused by these shears, which exhibit both dip-slip and strike-slip movements, the company can now strategically target faulted extensions of high-grade lodes. This refined geological understanding is expected to accelerate resource growth as drilling plans are optimised to exploit these newly defined targets.

Expanding High-Grade Potential Beyond Known Zones

Further mapping south of the Hendricks prospect has revealed previously unrecognised shear zones and quartz-calcite-barite veins exhibiting the same alteration signatures as the DAM deposit. These shear-breccia veins, indicative of hydrothermal activity, highlight structural pathways conducive to high-grade antimony mineralisation, suggesting the mineral system’s footprint is more extensive than previously thought.

These newly identified zones are now prioritised for sampling, with assay results eagerly awaited to determine their economic significance. The company’s systematic approach to sampling along the Beefeater Shear corridor will further clarify the potential for subsequent drilling campaigns.

Looking Ahead, From Mapping to Market

Locksley’s Managing Director and CEO, Kerrie Matthews, emphasised the transformative impact of these geological insights on the company’s exploration strategy. By 'unlocking' the underground geometry at DAM and identifying the Beefeater Shear, the company is poised to expand its critical minerals resource base with greater confidence.

With assay results pending and drilling programs being optimised to incorporate these new structural targets, the next phase of exploration at Mojave promises to be pivotal. The company’s integrated mine-to-market strategy for antimony, aimed at re-establishing domestic supply chains in the US, positions Locksley as a key player in the critical minerals sector.