Fortuna expands Indicated Mineral Resource by 73% to 1.25 million gold ounces, Diamba Sud Project, Senegal

Core Viewpoint - Fortuna Mining Corp. has announced a significant increase in the Mineral Resource estimate for the Diamba Sud Gold Project, with indicated resources now totaling 1.25 million ounces of gold, reflecting a 73% increase from the previous estimate, which positions the project favorably for future development and investment decisions [1][2]. Mineral Resource Summary - The updated Mineral Resource estimate includes 26.0 million tonnes of indicated resources averaging 1.50 g/t Au, containing 1,254,000 ounces of gold, and 2.1 million tonnes of inferred resources averaging 1.13 g/t Au, containing 77,000 ounces of gold [7][5]. - The Southern Arc deposit has been identified as the largest gold deposit at Diamba Sud, with a first-time estimation of 6.0 million tonnes averaging 1.91 g/t Au, containing 367,000 ounces of gold [5][4]. Project Development and Feasibility - The updated resource estimate is expected to support a feasibility study targeted for completion by mid-2026, which will advance the project towards a final investment decision [2][9]. - Ongoing exploration drilling continues to intersect mineralization beyond current resource envelopes, indicating further growth potential for the project [5][8]. Technical Advancements - Infill drilling has successfully upgraded inferred resources to indicated resources at several deposits, including Area D, Southern Arc, Moungoundi, and Karakara, enhancing overall resource confidence [11][5]. - The updated estimate incorporates drilling data from July 2025 to January 2026, which has improved geological interpretation and resource modeling [8][11]. Strategic Goals - The Diamba Sud project, along with the expansion of the Séguéla Mine, is central to Fortuna's strategy to grow into a company capable of producing over 500,000 ounces of gold annually from long-life assets [2][1].