Mosaic Conducts a Helicopter-Borne Magnetic Survey and Obtains Impact Work Permits on Golden Island

Executive Summary

• Mosaic Minerals completed a high‑resolution airborne magnetic survey of the entire Golden Island property.
• The Quebec Ministry of Natural Resources granted authorization for impact work, with drilling permits expected in the coming weeks ahead of a planned spring 2026 drilling campaign.
• Historical context and past drill results were disclosed, but no new resource estimate was provided.

Key Details

• Airborne magnetic survey now covers the full Golden Island property, providing a new high‑resolution dataset for planning.
• Impact work authorization obtained from Quebec Ministry of Natural Resources; drilling permits anticipated shortly.
• Spring 2026 drilling campaign is being prepared pending permit issuance and snow melt.
• Property access: year‑round via Regional Road 113 and boat launch on Tiblemont Lake.
• Historical background: former Tiblemont Island gold mine (1930s) with legacy infrastructure and historical resource estimate of ~391,000 t at 2.8 g/t Au (non‑NI 43‑101).
• Prior exploration highlights: 1982 SOQUEM program – 8 drill holes (1,150 m total); notable intercepts include:
• Hole 82‑2: 17.7 m @ 1.18 g/t Au (incl. 5.6 m @ 2.99 g/t Au) in Main zone.
• Hole 82‑6: 14.4 m @ 1.25 g/t Au (incl. 5.2 m @ 2.01 g/t Au).
• Hole 82‑8: 13.1 m @ 1.49 g/t Au (incl. 5.1 m @ 2.39 g/t Au).
• Additional intersect: Hole 82‑5 (≈1 km NW of main zone) – 4.7 m @ 1.31 g/t Au.
• Qualified Person: Gilles Laverdière, P.Geo., VP Exploration, reviewed and approved technical information per NI 43‑101.

Notable Quotes

“We are pleased to have a new high‑resolution dataset from the airborne magnetic survey… we look forward to beginning drilling as soon as possible after the snow melts.” – Jonathan Hamel, President & CEO, Mosaic Minerals.