FireFly assays high-grade samples for resource update and economic studies

Another batch of high-grade assays for FireFly’s resource update and economic studies

Latest high-grade results such as 11.5m @ 11.1% copper and 2.1g/t gold (13.2% CuEq) are expected to form part of the production profile for the early years of a Green Bay re-start

KEY POINTS

Latest drilling at Green Bay has returned more results which demonstrate the exceptional quality of the high-grade zones which will drive production when operations are resumed

The upper VMS zones continue to deliver high-grade copper and gold intersections, including: 11.5m @ 13.2% CuEq (11.1% Cu & 2.1g/t Au) in hole MUG26-101 (~ true thickness)

18.9m @ 8.2% copper equivalent (CuEq) 1 (7.0% Cu & 1.3g/t Au) and a further zone of 11.1m @ 12.1% CuEq (9.5% Cu & 2.4g/t Au) in hole MUG26-079 (~ true thickness)

13.5m @ 11.1% CuEq (8.4% Cu & 2.6g/t Au) and a further zone of 18.9m @ 7.0% CuEq (6.3% Cu & 0.8g/t Au) in hole MUG26-083 (~ true thickness)

19.8m @ 7.2% CuEq (6.6% Cu & 0.7g/t Au) in hole MUG26-086 (~ true thickness)

Drilling from the +800m-long high-grade Core Zone returned more significant results, including 65.3m @ 4.3% CuEq (3.6% Cu & 0.7g/t Au) in hole MUG26-060 (~ true thickness)

The high-grade Core Zone remains open with the deepest hole drilled to date returning 49.0m @ 6.1% CuEq (see ASX announcement dated 16 October 2025)

Significant intersections were also returned from close-spaced drilling in the footwall zone stringer-style mineralisation. These included: 36.9m @ 2.7% CuEq (2.6% Cu & 0.1g/t Au) and a further zone grading 21.4m @ 2.3% CuEq (2.2% Cu & 0.2g/t Au) in hole MUG20-067 (~ true thickness)

These infill drilling results will be incorporated into an updated Mineral Resource Estimate (MRE) which will underpin the economic study set for release this month

The underground drilling has been aimed primarily at increasing Mineral Resources in the higher-confidence Measured & Indicated categories, pivotal to the economic studies

The results are parti