Altoro Metals Confirms Exceptional Zinc Grades at Emilia Mine

Exceptional Zinc Grades Reinforce Emilia's Prospectivity

Altoro Metals (ASX:ARO) has unveiled a fresh tranche of high-grade zinc assay results from the historic Emilia mine, a key site within its Novales Project in northern Spain. Systematic channel sampling returned standout intervals including 2.65 metres grading 21.1% zinc and 0.14% lead, alongside several other metre-scale hits exceeding 14% zinc. These results underscore the high-grade nature of mineralisation outside the company’s existing Mineral Resource Estimate (MRE), bolstering the case for resource growth in this under-explored zone.

Modern Sampling Complements Historical Data

The channel sampling program, comprising 28 samples from underground workings and adjacent open pit areas, provides a modern, JORC-compliant dataset that complements Altoro’s earlier release of high-grade historical drilling results from May 2026. While the sampling locations were selected based on visible mineralisation, introducing some bias, the continuous cut-channel method offers a more systematic and reliable assessment of grade distribution compared to past face sampling.

Historical drilling at Emilia included impressive intercepts such as 0.85 metres at 23.47% zinc and 0.90 metres at 17.43% lead, reinforcing the area’s potential. The new channel results, including broader composite intervals like 4.5 metres at 13.7% zinc, provide fresh geological insights that will feed into refining Altoro’s geological model ahead of drilling.

Emilia Positioned Along a Significant Zinc Trend

Located approximately 2.3 kilometres northeast of the San José mine, Emilia sits along the extensive >12-kilometre San José–Udías zinc trend, a prolific corridor within the Novales Project. Notably, Emilia lies outside the current MRE, presenting a priority target for expanding the resource base. The continuity of mineralisation between Emilia, Novales, and Margarita mines remains untested at surface, a gap Altoro intends to address imminently.

Surface Drilling Campaign to Test Continuity and Resource Expansion

Altoro is gearing up for its first phase of surface drilling in Cantabria, targeting the zone between Novales village and the Emilia and Margarita mines. The campaign aims to test the geological continuity of high-grade zinc mineralisation, establish the geometry and thickness of mineralised zones, and explore areas beyond the existing MRE. This drilling will be critical to validating the extent of mineralisation and potentially underpinning an updated resource estimate.

The integration of the new channel sampling data with historical drilling and underground mine records will sharpen drill targeting and enhance the understanding of structural controls on mineralisation. While the sampling results are promising, the true thickness and lateral continuity of the zinc lenses require confirmation through drilling.

Exploration Momentum Builds Across Spanish Portfolio

Alongside Novales, Altoro is advancing its maiden diamond drilling program at Guajaraz, with assay results expected soon. The company’s active exploration strategy in Spain is focused on systematically unlocking value from multiple historic mining centres along the Novales zinc trend. The Emilia channel sampling results add a significant piece to this puzzle, providing contemporary data that supports the broader objective of resource expansion and development in a well-endowed zinc district.