Fortuna Mining Corp. reported a significant update to the Mineral Resource estimate for its Diamba Sud Gold Project in Senegal, effective July 7, 2025. The Indicated Mineral Resource increased by 53 percent to 14.2 million tonnes at an average gold grade of 1.59 g/t, containing 724,000 ounces of gold. The Inferred Mineral Resource grew by 93 percent to 6.2 million tonnes at 1.44 g/t Au, containing 285,000 ounces of gold, for a combined total of 1 million ounces.
This updated estimate is based on new drilling completed between July 2024 and July 2025, comprising 243 holes totaling 31,652 meters. The data improved geological interpretation and resource modeling for existing deposits and led to first-time resource estimates for the Southern Arc and Moungoundi prospects, expanding Diamba Sud's pipeline of emerging deposits.
The company is targeting the completion of a Preliminary Economic Assessment (PEA) for the project in the fourth quarter of 2025. Expansion drilling at these deposits, along with the drilling of new targets, is also planned for the fourth quarter of 2025, aiming to further enhance the project's potential.
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