Patriot Resources has dramatically expanded the Exploration Target at its Tassa Silver & Gold Project in Peru to between 559Moz and 774Moz silver equivalent, positioning it among the world’s largest undeveloped silver systems. A 4,000m drilling campaign is planned to convert this target into a formal Mineral Resource.
- Exploration Target upgraded to 559-774 million ounces silver equivalent
- Target based on integration of 20+ years of geological, geophysical and drilling data
- Strong silver dominance with high-grade surface mineralisation
- Potential for large-scale open-pit mining supported by deposit geometry
- Upcoming 4,000m drill program to convert target into Mineral Resources
Tassa Emerges as a Global Silver Giant
Patriot Resources Limited (ASX:PAT) has announced a substantial upgrade to the Exploration Target at its wholly owned Tassa Silver & Gold Project in southern Peru, estimating between 559 million and 774 million ounces silver equivalent (AgEq) from 359 to 422 million tonnes of ore at grades ranging from 48 to 57 g/t AgEq. This places Tassa firmly among the world’s largest undeveloped silver systems, a remarkable leap from the company’s February 2026 maiden inferred resource of just 31.4Moz AgEq.
The scale of this upgrade stems from Patriot’s first integrated interpretation of over two decades of geological, geochemical, geophysical, and drilling data, including 1,832 surface samples, approximately 36 kilometres of induced polarization (IP) geophysics, 70 kilometres of ground magnetics, and 8,500 metres of diamond drilling. This comprehensive dataset, sourced from previous operators Teck Peru, Bear Creek, and Buena Vista, has been independently validated and reconciled with the existing Mineral Resource Estimate (MRE).
Silver-Dominant High-Grade System with Open-Pit Potential
Dominic Duggan, Patriot’s Managing Director and CEO, highlighted the quality of the deposit, noting it is not just the size but the continuity and surface exposure of a silver-dominant system that makes Tassa compelling. The mineralisation extends over a 2.9-kilometre strike length, approximately one kilometre in width, and down to 550 metres depth, consistent with large-scale, bulk tonnage open-pit mining scenarios.
Surface sampling has returned exceptional silver grades, with rock chip assays peaking at 8,160 g/t Ag and multiple channel samples exceeding 1,000 g/t Ag. The system also hosts significant polymetallic credits including gold, copper, lead, and zinc, enhancing its economic potential.
The updated Exploration Target includes 663Moz to 479Moz silver at 49 to 42 g/t, confirming strong silver leverage. However, the target remains conceptual and not yet classified as a Mineral Resource, with conversion dependent on upcoming drilling success.
Near-Term Catalysts and Strategic Positioning
Patriot is advancing permitting and community engagement to facilitate a focused 4,000-metre infill drilling program targeting high-confidence “bridge zones” between existing resource areas. This campaign aims to convert the Exploration Target material into JORC-compliant Mineral Resources, providing a near-term catalyst for a material resource step-change.
The project’s district-scale upside is underscored by the identification of 19 mineralised zones across the system, indicating potential for further discoveries beyond the current target envelope. Continuous data integration and systematic testing of these zones will underpin ongoing exploration success.
This announcement follows Patriot’s recent 31.4Moz Silver Maiden Resource declaration, marking a rapid progression in the understanding and valuation of the Tassa Project. The company’s prior $500K capital raise at a premium and marketing partnership with Next Investors also set the stage for heightened investor engagement as the project advances.
Technical Validation and Data Confidence
The Exploration Target is reported in accordance with the 2012 JORC Code and is underpinned by robust technical validation. The integrated dataset combines historical drilling, geophysics, and geochemistry, all independently modelled. Notably, the IP geophysical surveys delineate two main chargeability anomalies starting near surface and extending to depths consistent with open-pit mining.
Drilling to date includes 26 diamond holes totalling over 8,400 metres, with significant intercepts such as 60m at 224.2 g/t Ag from 24m, and 234m at 0.25 g/t Au from 200m. End-of-hole assays confirm the system remains open at depth, supporting the potential for resource growth.
Metallurgical data is currently limited but based on analogous projects, assumptions for recovery rates have been incorporated into metal equivalent calculations. Environmental factors and detailed metallurgical testing remain areas for further work.
Bottom Line?
Execution of the planned drilling and permitting will be critical to translating Tassa’s impressive Exploration Target into a tangible resource and value inflection.
Questions in the middle?
- Will the upcoming 4,000m drill program confirm continuity and convert the Exploration Target into a formal Mineral Resource?
- How will metallurgical testing and environmental assessments shape the project's development pathway?
- Could strategic partnerships or joint ventures accelerate Tassa’s advancement given its scale and quality?