Lode Resources has delivered a maiden JORC Mineral Resource Estimate at Montezuma, revealing a high-grade silver-antimony system with clear underground mining potential and ongoing exploration upside.
- Maiden resource of 480kt at 533g/t AgEq totaling 8.2Moz AgEq
- 65% of resource classified as Indicated, supporting development studies
- Resource open along strike and at depth with ongoing drilling
- Strong metallurgical recoveries for antimony, silver, lead, and copper
- Prefeasibility Study targeted by end-2026 with district-scale exploration underway
High-Grade Maiden Resource Establishes Montezuma as Strategic Asset
Lode Resources Ltd (ASX:LDR) has marked a significant milestone with its maiden JORC (2012) Mineral Resource Estimate (MRE) at the Montezuma Silver & Antimony Project in Tasmania’s West Coast Mining Province. The estimate outlines a high-grade, structurally controlled silver-antimony system, comprising 480,000 tonnes at 533 grams per tonne silver equivalent (AgEq), equating to 8.2 million ounces AgEq. Notably, 65% of this resource is classified as Indicated, providing a solid foundation for advancing development studies.
The resource is reported at a 200g/t AgEq cut-off grade, underscoring its exceptional grade profile and suitability for underground mining. Montezuma’s mineralisation remains open both along strike and at depth, with 59 diamond drill holes totalling 8,446 metres supporting the geological model. This includes 37 holes drilled by Lode since April 2025, demonstrating rapid resource growth and potential for further expansion.
Robust Metallurgical Performance and Development Pathway
Metallurgical testwork, conducted primarily at ALS Burnie Laboratories, has delivered strong recoveries of 88.4% antimony, 93.0% silver, 88.4% lead, and 91.5% copper. These results bolster the economic prospects of Montezuma, which benefits from exposure to antimony; a critical mineral with growing strategic importance. The project is targeting a Prefeasibility Study (PFS) by the end of 2026, supported by ongoing metallurgical, mining, hydrogeological, and environmental studies.
Mining at Montezuma is expected to employ narrow vein underground techniques, with a decline access and Avoca style stoping considered the most likely method. The deposit’s steeply dipping fissure veins, hosted in graphitic shale and siliciclastic sandstone, yield narrow but high-grade mineralised widths, aligning with the proposed underground approach.
District-Scale Potential and Ongoing Exploration
Beyond the maiden resource, Lode is advancing exploration across the district with additional targets such as the Fahlore and Blocks East prospects. Drilling at Fahlore is planned for the June quarter, while the Blocks East prospect has recently been highlighted for its high-grade silver and antimony mineralisation, expanding Lode’s footprint in the region. This complements the recent discovery of the Blocks East prospect, which returned assays up to 5,650 g/t silver and 8.04% antimony, reinforcing the district’s prospectivity.
Montezuma’s geological model is well understood and supported by systematic drilling, surface mapping, and historical mining data. The current drill spacing of 30 to 40 metres is appropriate for resource estimation, with variogram modelling suggesting an optimal grade control drill pattern of 15 to 20 metres. The resource remains open in all directions, with extension drilling ongoing and recent results extending mineralisation to 270 metres depth.
Cautious Optimism Amid Pending Approvals and Forward Work
While the maiden resource and metallurgical results are promising, several factors warrant attention. The mine lease renewal is pending approval, and variability metallurgical testwork results are awaited to refine processing assumptions. The resource contains no Measured category ounces yet, reflecting some uncertainty in short-range grade continuity. Additionally, forward-looking statements are subject to typical mining risks including commodity price fluctuations, technical challenges, and permitting hurdles.
Nevertheless, Lode’s Managing Director Keith Mayes emphasised the project’s strategic importance, saying the high-grade silver-antimony system with critical mineral exposure and strong metallurgical outcomes positions Montezuma well for value creation. The company’s clear pathway to a PFS by year-end 2026 sets a tangible timeline for investors and stakeholders to monitor progress.
Bottom Line?
Montezuma’s maiden resource confirms a high-grade silver-antimony system with a tangible development pathway, but ongoing drilling, metallurgical variability results, and permitting remain key near-term milestones.
Questions in the middle?
- How will metallurgical variability testwork influence processing design and recoveries?
- What impact will the pending mine lease renewal have on project timelines?
- Can district-scale exploration at Fahlore and Blocks East significantly increase Montezuma’s resource base?