Locksley Resources (ASX:LKY) reports high-grade antimony intervals at Desert Antimony Mine

Locksley Resources has reported assay results from its maiden diamond drilling program at the historical Desert Antimony Mine, located within the company’s Mojave Project in California, USA.

The maiden drill campaign comprised eight diamond drill holes for a total of 1,065m completed between February and April 2026, targeting antimony mineralisation associated with historical underground workings, recent underground mapping, surface sampling and 3D geological modelling.

Assay results have been received for six drill holes, with the remaining two holes currently being processed by American Assay Laboratories in Reno, Nevada.

Highlights

• Assay results received from the maiden diamond drill program confirmed high-grade antimony mineralisation below the historical underground workings.
• Significant antimony intersections were returned from six of the eight completed drill holes.
• Peak value reported was 33.51% Sb over 0.4m within 4.0m @ 4.87% Sb in hole DADD0005A.
• All drill holes intersected antimony mineralisation below the historical Desert Antimony Mine workings.
• Diamond drilling at the El Campo REE prospect has been completed, with results expected in the coming weeks.

The maiden drill campaign comprised eight diamond drill holes for a total of 1,065m completed between February and April 2026, targeting antimony mineralisation associated with historical underground workings, recent underground mapping, surface sampling and 3D geological modelling.

All drill holes intersected antimony mineralisation below the historical Desert Antimony Mine workings, confirming the continuation of the mineralised system at depth, with assay results now received for six drill holes and the remaining two currently being processed.

Maiden drilling at DAM confirmed high-grade antimony mineralisation extends below the historic underground workings, with multiple significant intersections being integrated into the geological model for ongoing targeting.

The release stated mineralisation is hosted in subvertical quartz-stibnite veins and associated vein breccias within granite gneiss and tonalite.

The strongest result was identified in hole DADD0005A, which intersected 4.0m grading 4.87% Sb, including an internal interval of 0.4m grading 33.51% Sb, while hole DADD0004 returned a further intercept of 1.4m grading 5.62% Sb and hole DADD0003 intersected 2.0m grading 2.69% Sb.

The company reported drilling confirmed continuity of high-grade surface stibnite mineralisation along strike and below the historical underground workings, supporting geological modelling and future drill targeting.

Locksley Non-Executive Technical Director, Ian Stockton said:

“Diamond drilling at the historic Desert Antimony Mine represents the first test of the depth extensions of known antimony mineralisation beneath the historical workings, with mineralised veins intersecting 90m below existing underground workings.”

At the El Campo REE prospect, four diamond drill holes have been completed for 434m, with all geological logging completed and samples currently being assayed, with results expected in the coming weeks.

Ongoing work on the permit includes a ground radiometrics survey, geological fact mapping and channel sampling of the interpreted carbonatite outcrop.

The release listed several next steps across the Mojave Project, including progressive reporting of remaining assay results from the DAM and El Campo drilling program as received and validated.

The release also listed integration of drilling results into updated 3D geological models for DAM and El Campo to support ongoing targeting and assessment of follow up drilling opportunities.

Continued structural interpretation and geometry of mineralisation at DAM to assess strike and depth extension potential, metallurgical and mineralogical assessment of mineralised material, and follow-up ground radiometric surveys, geological mapping and rock chip sampling across priority regional anomalies within the Mojave Project were also listed.

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