Yeneena Project’s Tyrell Prospect Hosts 2.9Mt at 0.8% Copper – Encounter Reports

A New Chapter for Yeneena

Encounter Resources Limited (ASX, ENR) has marked a significant milestone at its Yeneena Project in Western Australia's Paterson Province by defining its first copper resource at the Tyrell Prospect. Following the company's regaining of 100% ownership, an initial Inferred Mineral Resource Estimate (MRE) of 2.9 million tonnes grading 0.8% copper has been established, including a coherent high-grade zone of 1.1 million tonnes at 1.3% copper. This shallow, flat-lying deposit lies mostly within 50 metres of surface, offering promising potential for near-term exploration and development.

The Scale and Potential of the Parbo Copper System

The Tyrell Prospect is part of the broader Parbo copper system, which extends over 8 kilometres along the McKay Fault. This extensive system hosts multiple high-quality copper targets beyond Tyrell, with historical drilling revealing notable high-grade intersections such as 5.3 metres at 2.5% copper including a spectacular 0.7 metres at 10.7% copper. Encounter is prioritising these targets for follow-up drilling in 2026, aiming to unlock further value from this underexplored system.

Strategic Positioning in a Tier 1 Jurisdiction

Located approximately 60 kilometres southwest of the Telfer copper-gold mine and south of the Nifty copper mine, Yeneena sits within one of Australia's most prospective mineral provinces. The Paterson Province has recently yielded significant discoveries such as Havieron and Winu, underscoring the region's potential. Encounter’s renewed focus on Yeneena complements its primary critical minerals project at Aileron in the West Arunta, diversifying its portfolio with a quality copper asset.

Robust Resource Estimation and Next Steps

The resource estimate, prepared by Snowden Optiro Pty Ltd in accordance with the JORC Code (2012 Edition), is based on a comprehensive review of drilling data from aircore, reverse circulation, and diamond drilling campaigns conducted between 2010 and 2014. While the resource is classified as Inferred due to limited density data and the early stage of exploration, it reflects reasonable prospects for eventual economic extraction under current assumptions.

Looking ahead, Encounter plans to commence reverse circulation drilling at the Haddon prospect, located about 25 kilometres northeast of Parbo, in October 2025. This will test a large electromagnetic anomaly associated with copper sulphide mineralisation. Further drilling at Parbo is scheduled for 2026 to target extensions of the high-grade copper zones and potential feeder structures at depth.

Balancing Opportunity and Uncertainty

While the initial resource and exploration results are encouraging, the project remains at an early stage. Metallurgical testing and bulk density measurements have yet to be completed, and some assay contamination issues are under investigation. These factors, along with the Inferred classification, suggest that further work is essential to upgrade the resource confidence and fully assess the project's economic viability.