First Mining Strengthens Miroir Discovery at Duparquet Gold Project with New Near-Surface Drilling Results and Expands Valentre Target Zone at Depth

Core Insights - The Miroir target presents a significant expansion opportunity, with the 2025 drilling program aimed at delineating the near-surface extent of mineralization [1][7] - Initial drill results confirm and expand the known extent of gold mineralization at Miroir, with notable intercepts including 2.77 g/t Au over 11.1 m and 1.41 g/t Au over 11.9 m [1][4] - The Duparquet Gold Project is emerging as one of the largest gold development projects in Quebec, with ongoing exploration demonstrating significant resource growth potential [2][20] Miroir Target - The 2025 drilling at Miroir focuses on further delineating mineralization around the discovery hole DUP24-048, which returned 3.12 g/t Au over 19.35 m [7][10] - Significant intercepts from the Miroir target include multiple drill holes with high-grade results, confirming the open-ended nature of the target [1][4] - The mineralization is associated with silica-altered, sheared, and brecciated basalt and syenite, indicating strong geological controls on mineralization [9][11] Valentre Target - The Valentre target has shown continuity of mineralization, with drill hole DUP25-054 returning 3.96 g/t Au over 9.3 m, including 5.71 g/t Au over 5.8 m at a depth of approximately 330 m [2][10] - The objective of the 2025 drilling campaign at Valentre is to evaluate grade continuity and refine the understanding of higher-grade zones at depth [10][12] - Follow-up drilling is planned to support updated geological modeling and potential incorporation into future mineral resource estimates [12] Exploration Program - The 2025 exploration program includes ongoing drilling activities at key resource growth targets, with two drill rigs actively advancing [6][20] - Regional field campaigns are set to commence, focusing on target generation across favorable lithologies and structures [6] - The Duparquet Project currently hosts an NI 43-101 compliant gold resource of 3.44 million ounces in the Measured & Indicated category, grading 1.55 g/t Au [16][17]