お知らせ • Dec 11
Fortuna Mining Corp. Provides Mineral Reserves and Mineral Resources for the Séguéla Mine, Côte D'ivoire
Fortuna Mining Corp. announced updated Mineral Reserves and Mineral Resources at its Séguéla Mine with the discovery of over 500,000 gold ounces of new Inferred Resources. Fortuna estimates the Kingfisher deposit contains an Inferred Mineral Resource of 4.0 Mt at an average grade of 2.29 g/t Au containing 294,000 gold ounces, and the Badior deposit contains an Inferred Mineral Resource of 470,000 tonnes at an average grade of 4.05 g/t Au containing 61,000 gold ounces. The updated Inferred Mineral Resource will not materially change the existing Mineral Resource estimate at the Séguéla Mine. As of October 31, 2024, the Séguéla Mine has Proven and Probable Mineral Reserves of 9.4 Mt containing 1.0 Moz Au, in addition to Indicated Resources of 3.4 Mt containing 396,000 oz Au and Inferred Resources of 7.3 Mt containing 677,000 oz Au. From December 31, 2023 to October 31, 2024, Mineral Reserve tonnes decreased by 20 percent, while gold grade increased by 11 percent to 3.38 g/t Au and contained gold ounces decreased by 12 percent. Changes are due to mining related depletion of 123,000 oz Au, pit optimization and increases to the reporting cut-off grade due to higher processing and service costs resulting in a decrease of 53,000 oz Au, adjustments related to the identification of historical artisanal activities at the Ancien deposit resulting in a decrease of 17,000 oz Au, offset by an increase of 55,000 oz Au in relation to grade control drilling conducted at the Antenna, Koula, and Ancien deposits, as well as exploration drilling at Sunbird.Measured and Indicated Resource gold ounces, exclusive of Mineral Reserves, increased 4 percent, or 15,000 oz Au in relation to minor adjustments in the geologic interpretation and reporting cut-off grades. Inferred Resources tonnes increased by 137 percent to 7.3 Mt, while gold grade increased by 16 percent to 2.90 g/t Au, and contained gold ounces increased by 176 percent to 677,000 oz Au. The change is due to the maiden estimates of the Kingfisher, Badior, Gabbro North, and Kestrel deposits adding 368,000 oz Au, an extension of the underground resources at the Sunbird deposit adding 141,000 oz Au, and adjustments to pit shells and an increase in reporting cut-off grades, resulting in a decrease of 71,000 oz Au. The Kingfisher deposit is located approximately 1 kilometer to the east of the previously reported Sunbird deposit, with the Kestrel deposit located just 250 meters to the south of the currently mined Antenna pit. Badior is located approximately 7 kilometers to the north of the processing plant and the Gabbro North deposit is located 2.5 kilometers to the southeast of Badior, approximately 6 kilometers from the plant. Kingfisher is hosted in a set of quartz veins along a moderately sheared contact between a series of basalt-dolerite units, which also hosts the Boulder and Agouti deposits located 1 and 3 kilometers, respectively, to the north, with a steep easterly dip consistent with the majority of the other deposits at Séguéla. Kestral is hosted in a series of steep easterly dipping quartz veins within an intercalated basalt-dolerite sequence associated within the locally named Koula-Ancien basalt package. Badior appears to be hosted in steeply dipping quartz veins close to the contact of a series of volcanoclastics to the west and the Koula-Ancien basalt package to the east. Gabbro North is hosted in the East Domain, a thick sequence of pillow basalts and minor mafic volcanoclastics, within steeply dipping quartz veins. Structural deformation is variable across all of the units with the mineralization and quartz veining usually associated with the development of mylonitic zones. The maiden Inferred Mineral Resource estimates were prepared using diamond and reserve circulation (RC) drillholes comprising 168 holes totaling 23,628 meters for Kingfisher, 68 holes totaling 8,285 meters for Badior, 78 holes totaling 9,320 meters for Gabbro North, and 42 holes totaling 4,879 meters for Kestrel, all drilled by Fortuna since 2021. Kingfisher mineralization has been drilled over a strike length of 2 kilometers to a depth of 250 meters along 50-meter centers. Badior, Gabbro North and Kestrel mineralization has been defined over strike lengths of 300, 500, and 150 meters, respectively, and to depths of 150 meters along 25-meter centers. All RC drilling used a 5.25-inch face sampling pneumatic hammer with samples collected into 60-liter plastic bags. Samples were kept dry by maintaining enough air pressure to exclude groundwater inflow. If water ingress exceeded the air pressure, RC drilling was stopped, and drilling converted to diamond core tails. Once collected, RC samples were riffle split through a three-tier splitter to yield a 12.5 percent representative sample for submission to the analytical laboratory. The residual 87.5 percent samples were stored at the drill site until assay results were received and validated. Coarse reject samples for all mineralized samples corresponding to significant intervals are retained and stored on-site at the Fortuna-controlled core yard. All diamond drill holes were drilled with HQ sized diamond drill bits. The core was logged, marked up for sampling using standard lengths of one meter or to a geological boundary. Samples were then cut into equal halves using a diamond saw. One half of the core was left in the original core box and stored in a secure location at the Company's core yard at the project site. The other half was sampled, catalogued and placed into sealed bags and securely stored at the site until shipment. All RC and diamond core samples were shipped to ALS Laboratories preparation laboratory in Yamoussoukro for preparation and then, via commercial courier, to ALS's facility in Ouagadougou, Burkina Faso for finishing. Routine gold analysis using a 50-gram charge and fire assay with an atomic absorption finish was completed for all Séguéla samples. Quality control procedures included the systematic insertion of blanks, duplicates, and standards into the sample stream. In addition, the ALS laboratory inserted its own quality control samples.