Locksley Resources (ASX:LKY | OTCQX:LKYRF | ADR:LKYLY) maps new structural target at Mojave antimony project

Locksley Resources has added a new structural target to its Mojave Project in California following detailed underground and surface mapping at the historic Desert Antimony Mine, with the company identifying a previously unrecognised shear corridor between established prospects and setting up a revised drill targeting framework.

The update is based on structural mapping and geological interpretation, with assays still pending, but it materially changes how the known high grade antimony vein system is being modelled and extended.

Highlights

• Identification of the Beefeater Shear, a 10–15 m wide North South corridor between the Desert Antimony Mine and the Hendricks prospect
• Detailed underground mapping confirmed the geometry of stibnite veins and offsetting structures
• East West striking shears shown to crosscut and displace primary North South mineralised veins
• Structural observations indicate “pinched out” veins are often offset blocks rather than true terminations
• New DAM type shear zones mapped south of Hendricks with goethite alteration and quartz calcite dominated shear breccia veins
• Assays from surface and underground sampling are pending

The Beefeater Shear has been delineated through regional surface mapping and high resolution underground work as a North South striking structure centrally positioned between the Desert Antimony Mine to the west and the Hendricks prospect to the east.

The corridor is mapped at widths of up to 10–15 m and is described as a broader zone of moderate shearing containing narrower, more intense internal shears.

It exhibits intense goethite alteration, which the company describes as a diagnostic surface expression of original antimony rich sulphide mineralisation observed at the high grade Desert Antimony Mine.

According to the technical review, the Beefeater Shear shares the same structural timing and kinematic history as the Desert Antimony Mine mineralised vein system.

The presence of a wide, similarly altered adjacent structure supports the interpretation that antimony mineralisation at Mojave may be hosted across multiple structures of similar timing rather than a single isolated vein occurrence, and it has therefore been defined as a new primary exploration target.

Underground structural mapping at the Desert Antimony Mine has also refined the understanding of vein continuity.

The work identified younger East West striking shears that crosscut and displace the primary North South veins, with both dip slip and dextral strike slip movement recorded.

These offsets explain why high grade zones appear to terminate abruptly in parts of the historic workings.

By measuring displacement along these structures, the company reports it can now more effectively target faulted extensions of high grade lodes as part of drill planning.

Locksley Managing Director and CEO Kerrie Matthews says the mapping has reframed the geological model:

“By mapping the underground workings at DAM, we have essentially ‘unlocked’ the geometry of the system. We now see exactly how high grade, mineralised blocks have been created by later structural events, allowing us to target extensions with greater certainty.”

Additional mapping south of Hendricks has defined previously unrecognised North South shear zones and quartz veins with calcite and barite that share the same geological fingerprint as the Desert Antimony Mine.

Quartz dominated shear breccia veins linked to hydrothermal activity were identified and are now prioritised for sampling to assess their potential economic importance.

Next steps include optimisation of drill hole planning based on newly mapped East West faults and shears, receipt of assays from underground and surface samples, systematic rock chip and soil sampling along the 10–15 m wide Beefeater Shear, and evaluation of a future diamond drilling program.

The immediate direction is clear, with structural controls now driving targeting across the Mojave antimony system.

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