Emu NL Confirms Multiple Cu-Ag Mineralised Branches at Fiery Creek

Stage 1 Drilling Validates Geological Model

Emu NL has reported encouraging results from its initial drilling campaign at the Fiery Creek prospect, part of the broader Yataga Project in Queensland. The Stage 1 drilling successfully validated the company’s geological and structural models, confirming the presence of a steeply dipping shear-hosted copper-silver system accompanied by flat-lying intrusive-related mineralisation zones. This dual style of mineralisation suggests a complex and fertile geological environment.

Drill intercepts revealed multiple mineralised “branches” emanating from a central feeder structure, with notable grades such as 13 metres at 0.5% copper and 9.7 grams per tonne silver, including higher-grade intervals up to 1.5% copper and 31.3 grams per tonne silver. While grades vary, the geometry and controls on mineralisation continuity are now better understood, providing a robust framework for future exploration.

Refined Geological Interpretation: A Hybrid System

The drilling results have led to a significant revision of the geological model at Fiery Creek. Rather than a simple vein system, the mineralisation is now interpreted as a hybrid structural-intrusive system. A steeply dipping shear zone acts as the primary conduit for mineralising fluids, with multiple shallow-dipping mineralised splays branching off. The host rocks are granodiorite intrusives, with aplite dykes and sills representing late-stage magmatic activity that contributed to metal transport and fluid generation.

This “Christmas Tree” style mineral system, characterised by a central feeder and multiple mineralised offshoots, is supported by integrated drilling, surface mapping, and geophysical data. The geochemical signature dominated by copper, silver, bismuth, and tellurium aligns with a porphyry-related magmatic-hydrothermal system, reinforcing the prospectivity of the area.

Implications for Yataga Valley and Next Steps

Importantly, the Fiery Creek results materially de-risk and enhance the exploration potential of the adjacent Yataga Valley targets. The presence of both steep shear-hosted and shallow intrusive-hosted mineralisation styles, coupled with coincident geophysical anomalies, provides a compelling basis for the upcoming 2026 drilling programme. The Yataga Valley area features large chargeability anomalies interpreted as sulphide mineralisation zones, consistent with the Fiery Creek model.

Emu NL plans to integrate the latest assay data, including pending results from two diamond drillholes, into a comprehensive 3D geological and geophysical model. This will guide follow-up drilling to test extensions at Fiery Creek and prioritise targets across Yataga Valley. The company’s managing director, Doug Grewar, emphasised that these results significantly boost confidence in the broader project’s potential.

Technical Rigor and Quality Assurance

The drilling utilised reverse circulation percussion methods with rigorous sampling and assay protocols. Independent laboratories and certified reference materials ensured data quality and accuracy. While the relationship between downhole intervals and true widths remains to be clarified, the comprehensive dataset supports a systematic approach to exploration moving forward.