EV Resources Defines Extensive Shallow CRD Antimony System at Los Lirios

Large-Scale CRD System Emerges at Los Lirios

EV Resources (ASX:EVR) has taken a significant step forward at its Los Lirios Antimony Project in Oaxaca, Mexico, by delineating a large-scale, shallow Carbonate Replacement Deposit (CRD) style system. Ten of 11 drill holes at the Lirios 1 area intersected a consistent silicified limestone unit, interpreted as the mineralised CRD horizon, confirming the presence of a laterally extensive system with strong continuity and scale potential.

The CRD unit, occurring at shallow depths with a relatively uniform thickness between 1 and 2.25 metres, has been traced over a minimum 400-metre strike length and remains open in multiple directions. This includes a step-out hole drilled 200 metres southwest of historical workings, which also intersected the unit, suggesting the system extends well beyond previously known limits.

High-Grade Channel Sampling Supports Scale Thesis

Channel sampling across the unit has yielded antimony grades up to 30.2%, providing early evidence of high-grade mineralisation that aligns with the drilling results. While assay results from the recent drill program are still pending, geological logging and the correlation with these channel samples bolster confidence in the prospectivity of the CRD system.

EV Resources CEO Mike Brown highlighted that CRD deposits represent the world’s largest class of antimony mineralisation and typically offer significant scale advantages over epithermal vein types. He noted the geometry, structural controls, and grade of surface samples are consistent with such systems, setting a clear path towards defining an Exploration Target and a maiden JORC Mineral Resource Estimate.

Structural Controls and Mineralisation Model

The CRD unit is structurally controlled by vertical and low-angle faults that acted as fluid conduits, with mineralising fluids migrating along these faults before dispersing laterally into receptive limestone horizons beneath a gypsum cap. Massive stibnite mineralisation observed at surface near these structures suggests the presence of high-grade feeder zones, which are prioritised for upcoming Phase 2 drilling.

This structural and geological interpretation aligns with EVR’s broader regional model, where the mineralisation is hosted within gently folded Middle and Upper Jurassic limestones and shales. The presence of multiple fault systems, including the 6-kilometre Lirios Fault Zone, provides extensive pathways for mineralising fluids and supports the potential for a sizeable, scalable deposit.

Infrastructure and Production Pathway

Los Lirios benefits from proximity to EVR’s Tecomatlán Processing Plant, located just 50 kilometres away in Puebla, Mexico. The plant is undergoing active refurbishment and electrical upgrades, positioning EVR to leverage a low-capital, near-term processing route for Los Lirios ore. This hub-and-spoke strategy, including initial processing of third-party ore, aims to accelerate production ahead of full-scale development at Los Lirios.

This development complements the company’s recent progress, as detailed in the drilling and plant refurbishment update, where the refurbishment timeline and early drilling results were outlined, underscoring EVR’s momentum in establishing a North American antimony hub.

Next Steps and Legal Considerations

EVR plans to complete Phase 1 drilling at additional targets within the Los Lirios tenement, including Hormiguero and Lirios 2, while integrating assay results and geophysical data to refine Phase 2 drill targets. A key focus will be testing feeder structures that could host higher-grade mineralisation zones.

However, the project faces regulatory uncertainty, as the Lirios 1 mining licence is currently subject to a judicial appeal following a contested cancellation process by Mexican authorities. EVR is actively pursuing this appeal, which remains a material consideration for the project’s timeline and development potential.