Encounter Resources Identifies Promising Shallow Copper-Gold Zone at Elsa Prospect in Paterson Province

Encounter Resources and the Lamil Copper-Gold Project Overview

Encounter Resources Limited is an exploration and development company targeting copper-gold mineralisation within Western Australia’s Paterson Province. Its flagship asset, the Lamil Copper-Gold Project, spans approximately 61 square kilometres and lies 25 kilometres northwest of Greatland Gold’s Telfer copper-gold mine. The Paterson Province is recognised as one of Australia’s premier regions for major copper-gold deposits, hosting world-class discoveries such as Greatland Gold’s Havieron deposit (7.0 million ounces of gold and 275,000 tonnes of copper), Rio Tinto’s Winu deposit (7.9 million ounces of gold and 2.9 million tonnes of copper), and Antipa Minerals’ Minyari Dome deposit (2.3 million ounces of gold and 84,000 tonnes of copper).

Encounter has been systematically exploring three prospect areas within Lamil: Dune, Gap, and Elsa. Previous drilling yielded encouraging results, including 33 metres at 0.5 g/t gold and 0.1% copper at Elsa, 10 metres at 2.8 g/t gold at Dune, and high-grade copper intercepts such as 1.5 metres at 19.1% copper from 409.1 metres depth at Dune. These outcomes have validated the project’s prospectivity and guided the current exploration strategy at Elsa.

RC Drilling Campaign and Copper-Gold Intersections at Elsa

The company executed a broad-spaced 10,000-metre RC drilling program at Elsa to systematically test the interpreted breccia complex and identify metal-enriched zones. Drilling on three 400-metre-spaced lines intersected shallow copper and gold mineralisation, providing a defined focus for future exploration. Mineralisation was encountered in multiple adjacent holes, indicating a consistent and potentially extensive zone.

Key copper results include 18 metres at 0.45% copper from 96 metres depth in hole ETG284, including 2 metres at 1.15% copper from 100 metres. Hole ETG283 returned 14 metres at 0.36% copper from 104 metres. Gold assays were also promising: hole ETG283 intersected 6 metres at 1.74 g/t gold from 94 metres (including 2 metres at 3.5 g/t gold from 96 metres) and 5 metres at 0.76 g/t gold from 247 metres. Hole ETG303 yielded 40 metres at 0.23 g/t gold from 100 metres, while ETG282 returned 18 metres at 0.33 g/t gold from 154 metres. The discovery of shallow mineralisation across multiple holes is a key milestone for the exploration program.

Extensive Preferential Weathering Zone Suggests Potential for Deeper Mineralisation

The Elsa drilling identified a significant preferential weathering zone coinciding with copper-gold mineralisation, extending more than 200 metres below surface. Drilling has not yet reached fresh rock, indicating the weathering zone may extend deeper. Such zones are typically associated with sulphide-rich mineral systems at depth, as weathering preferentially alters sulphide minerals, creating distinctive geochemical and textural features.

Encounter interprets this weathering zone as evidence supporting the potential for deeper mineralisation. The company draws parallels with the Havieron-style breccia complex, where economic mineralisation forms a small part of a larger intrusive breccia system. The extensive weathering zone at Elsa suggests a substantial sulphide-rich body may exist at depth, making it a priority target for upcoming drilling.

Geological and Structural Context of the Elsa Prospect

Elsa is located at the southeastern end of the Lamil dome, featuring an interpreted intrusive-related system anomalous in copper, gold, arsenic, molybdenum, and bismuth, centred around magnetic anomalies. Prior drilling intersected brecciated, fractured, and veined metasediments with intense sulphide alteration, indicating a breccia and alteration system characteristic of a major structural fluid pathway, potentially analogous to the Havieron discovery 80 kilometres east.

The prospect lies at the convergence of major structural features within the Lamil dome core. Geological indicators of high prospectivity include the break at the Malu quartzite ridge’s end, magnetic hydrothermal breccias, and evidence of multiple mineralised fluid pulses. These factors support Elsa’s classification as a priority exploration target within the Lamil portfolio.

Drilling Strategy and Exploration Design at Elsa

The RC drilling program employed a systematic approach with broad 400-metre spacing to test the breccia complex and locate metal-enriched zones efficiently. This initial phase balances coverage and cost-effectiveness, informed by the Havieron system where economic mineralisation occupies a small portion of a larger breccia complex.

The 10,000-metre RC program was co-funded by the Exploration Incentive Scheme (EIS), reflecting government support. RC drilling enables rapid sample collection and cost-effective exploration. The results defined a roughly 1.2-kilometre-long target zone, marking significant progress in understanding Elsa’s mineralisation distribution and guiding more focused future drilling.

Regional Comparison with Havieron Deposit

Encounter’s exploration at Elsa is guided by geological similarities to Greatland Gold’s Havieron deposit, located about 80 kilometres east. Havieron contains 7.0 million ounces of gold and 275,000 tonnes of copper within a breccia complex. Encounter interprets Elsa’s breccia and alteration system as a comparable style, where economic mineralisation is typically confined to discrete zones within a larger intrusive breccia.

This analogy informs Encounter’s strategy to focus future drilling on zones of highest-grade mineralisation identified by the broad-spaced RC program, rather than continuing wide-spaced drilling across the entire prospect.

Historical Drilling and Exploration Results at Elsa

Initial assay results released in May 2026 included drillhole ETG262, which intersected 16 metres at 0.3% copper at the eastern drill line’s northern end. However, a hole 200 metres north did not find additional copper, prompting further investigation into mineralisation controls. This variability underscored the need for systematic drilling to define lateral extent and distribution of mineralisation.

The subsequent 10,000-metre RC program successfully delineated a 1.2-kilometre-long copper-gold zone, providing clearer target definition and reducing geological uncertainty. This progression highlights the effectiveness of a structured exploration approach.

Upcoming Exploration and Heritage Survey Compliance

After completing drilling at the Parbo copper prospect within the Yeneena area, Encounter will focus on Elsa. The next exploration phase includes follow-up RC drilling across the 1.2-kilometre copper-gold target, contingent on completing heritage surveys. These surveys ensure protection of Indigenous cultural sites and demonstrate the company’s commitment to responsible exploration.

Planned activities also involve deeper RC and diamond drilling to test below shallow mineralisation and the preferential weathering zone, as well as defining breccia complex margins. This phased approach progresses from cost-effective RC drilling to detailed diamond core sampling for advanced geological analysis.

Operations at Parbo and Yeneena Project Update

While recent updates focus on Elsa, Encounter is advancing exploration at Parbo in the Yeneena area. RC pre-collars have been completed, with assay results expected in August 2026. Pre-collaring prepares holes for subsequent diamond drilling, indicating planned follow-up work.

Diamond drilling at Parbo is progressing well, reflecting active exploration across multiple Paterson Province prospects. Completion of Parbo drilling is a prerequisite before refocusing efforts on Elsa, allowing efficient allocation of resources across projects.

Share Price Impact and Investor Outlook

The immediate share price impact was unclear at the time of the update. Investor reactions depend on project stage, company financials, market conditions, and expectations. The Elsa results mark a significant advancement in defining a priority target, though the prospect remains in early exploration with no resource estimate or development timeline announced.

Investors will monitor key developments including heritage survey outcomes, timing and results of follow-up RC drilling at Elsa, August 2026 assay results from Parbo, and ongoing diamond drilling updates. Progress in defining mineralisation extent and grade at Elsa will be crucial for potential future resource estimation. The 1.2-kilometre target zone represents meaningful progress, but extensive drilling remains necessary to establish a mineral resource under Australian standards.