Ongoing Exploration Drilling At Sunbird Deposit

VANCOUVER – Fortuna Mining Corp. report on the ongoing exploration drilling at the Sunbird Deposit, located at the Séguéla Mine in Côte d’Ivoire. Recent drilling has successfully extended high grade mineralization at depth and confirmed the development of a second underground shoot, further supporting the potential for resource growth and mine life extension.
Paul Weedon, Senior Vice President of Exploration, said, “Drilling at Sunbird has been very successful in expanding the underground potential, with the deepest holes to date intersecting multiple high grade intervals, including 5.2 g/t Au over an estimated true width of 6.3 meters from 787 meters in drill hole SGRD2460. This result extends the central mineralized zone a further 150 meters down plunge, where it remains open.
Drilling has also been very successful in extending the lower shoot a further 200 meters down plunge, with highlights including 6.0 g/t over an estimated true width of 11.9 meters in drill hole SGRD2461 from 669 meters, the deepest hole completed on this shoot to date, where it also remains open. With over 1.5 kilometers of high grade strike now defined below Sunbird, we have initiated an underground study while five drill rigs continue to advance drilling aimed at expanding the mineralized envelope and testing its full extent.”
A further 40 drill holes, totaling 15,088 meters, have been completed at Sunbird as part of the underground resource confidence infill and extension program. The objectives of the program are twofold: first, to infill and upgrade resource confidence to support the ongoing underground mining study; and second, to extend and expand mineralization a further 400 meters down plunge to the south.
Drilling on the main shoot continues to intersect high grades along the projected plunge, with drill-defined mineralization now extending more than 1.3 kilometers down plunge, approximately 700 meters below surface. Results include 5.2 g/t Au over an estimated true width of 6.3 meters from 787 meters and 5.4 g/t Au over an estimated true width of 4.9 meters from 802 meters in drill hole SGRD2460.
Recent intersections such as 6.0 g/t Au over an estimated true width of 11.9 meters from 669 meters in drill hole SGRD2461 and 13.3 g/t Au over an estimate true width of 3.5 meters from 786 meters in drill hole SGRD2467, highlight the strengthening of a second high grade shoot extending at least 900 meters down plunge from the pit base.
Mineralization remains open at depth and along strike, with drilling to continue through the end of 2025.