Discovery of Copper Mineralization in 400 Metre Step-Out Drill Hole, Four Kilometres North of the Mount Polley Mill

VANCOUVER, British Columbia, Aug. 12, 2025 (GLOBE NEWSWIRE) -- Imperial Metals Corporation (“Imperial” or the “Company”) (TSX:III) reports that an exploration drill hole, drilling a blind target through clastic cover rocks, intercepted a hydrothermal breccia hosting significant visual native copper at the unconformity with the Mount Polley Intrusive Complex (MPIC). Two intercepts in diamond drill hole FP-25-01 of 7.0 metres grading 0.70% copper and 0.27 g/t gold starting at 383.0 metres, and 20.0 metres grading 0.25% copper and 0.96 g/t gold starting at 417.5 metres, mark the discovery of significant mineralization in a major step-out. The drill hole was collared 4.15 kilometres north of the operating Mount Polley mill (see Figure 1).