Fortuna Mining Corp. completed 44 reverse‑circulation and diamond core drill holes totaling 7,518 meters at the Southern Arc deposit of its Diamba Sud gold project in Senegal. The new data were incorporated into the company’s latest mineral resource estimate, raising the indicated resource to 1.25 million ounces at an average grade of 1.9 g/t Au and adding 367,000 ounces of gold to the deposit.
The updated resource estimate represents 6 million tonnes at 1.91 g/t Au, containing 367,000 ounces. The upgrade is a 73 % increase in indicated gold ounces and now places 94 % of the project’s total gold ounces in the indicated category, the highest confidence level. This expansion makes Southern Arc the largest single mineral deposit at Diamba Sud.
"Infill and extension drilling at Southern Arc continues to strengthen the scale and confidence of the deposit, contributing to the updated and expanded updated Mineral Resource of 6 million tonnes averaging 1.9 g/t Au, containing 367,000 gold ounces, making it today the largest single mineral deposit at the growing Diamba Sud Project.” – Paul Weedon
"Southern Arc remains open at depth and along strike to both the southwest and northeast, with drilling continuing." – Paul Weedon
"This updated Mineral Resource estimate represents a significant advancement for the Diamba Sud Gold Project, highlighted by a 73% increase in indicated gold ounces with 94% of total gold ounces now in the indicated category. This update provides a strong foundation for the feasibility study we plan to publish by mid‑year 2026 and materially advances the project toward a final investment decision.” – Jorge A. Ganoza
"Diamba Sud, together with the expansion of the Séguéla Mine, currently under study, is central to our strategy to grow Fortuna into a company capable of producing more than 500,000 ounces of gold annually from long‑life assets.” – Jorge A. Ganoza
The deposit remains open at depth and along strike, and step‑out drilling is scheduled for the second quarter of 2026 to test extensions to the southwest, northeast, and south. The resource upgrade provides a strong foundation for the feasibility study targeted for mid‑year 2026 and moves the project closer to a final investment decision, supporting Fortuna’s goal of becoming a larger‑scale gold producer.
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