Sego Resources Intercepts Porphyry-Related Phyllic Alteration at Cuba Zone, 1200 m Northeast of the Billy Zone Porphyry Copper Discovery Made in December 2025

Core Viewpoint - Sego Resources Inc. has successfully intercepted a classic porphyry-related phyllic alteration zone in drill hole DDH25-71 at the Cuba Zone, indicating potential for deeper copper mineralization [1][3]. Geological Observations - Drill hole DDH25-71 was strategically placed based on earlier copper intercepts from holes DDH-MM-18-37 and DDH-MM-18-34 to explore deeper, structurally controlled porphyry copper mineralization [3]. - The presence of fine and disseminated pyrite, along with occasional stringers and veinlets, was noted within the phyllic altered zone [5]. - Quartz stockwork was observed locally, which is significant for copper porphyry deposit exploration as it often defines a halo surrounding the central alteration zone [10]. Alteration Characteristics - Patchy potassic (K-feldspar) alteration was intercepted in the lower part of drill hole DDH25-71, starting at a depth of 542.93 m and extending to 586.64 m, with increasing size and intensity at greater depths [11]. - The core appearance below 577.68 m, particularly between 580.84 m and 586.64 m, resembled the best mineralized intervals of drill hole MM-18-37, indicating potential for similar mineralization [12]. Magnetic Susceptibility - A significant increase in magnetic susceptibility readings was recorded at 560 m depth, with high to very high readings from 560 m to 588 m, suggesting a strong mineralized zone [13]. Next Steps - Based on geological observations, the next drill hole in the Cuba zone is planned to be drilled from the northeast to potentially intercept the mineralized zone earlier [6].