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Hercules Metals Reports Drilling Results And Exploration Updates At Leviathan Porphyry System And Hook Target In Idaho
Hercules Metals intersected 801.6 m of 0.40% CuEq (0.30% Cu, 82 ppm Mo, 5.3 g/t Ag, 0.01 g/t Au) in HER-25-21, including 107.8 m of 0.52% CuEq (0.43% Cu, 104 ppm Mo, 1.8 g/t Ag, 0.02 g/t Au) and 206.3 m of 0.45% CuEq (0.39% Cu, 98 ppm Mo, 0.7 g/t Ag, 0.01 g/t Au). HER-25-18 was further extended downhole, returning a final composite interval of 787.9 m of 0.54% CuEq (0.43% Cu, 91 ppm Mo, 3.5 g/t Ag, 0.03 g/t Au), including 212.8 m of 0.89% CuEq (0.67% Cu, 128 ppm Mo, 10.2 g/t Ag, 0.05 g/t Au). All three holes reported in this news release also include high-grade intersected at the top of the system, summarized as follows: HER-25-18 - 57.4 m of 1.18% CuEq, beginning at 188 m downhole (158 m true depth below surface); HER-25-21 - 21.3 m of 2.00% CuEq, beginning at 224 m downhole (214 m true depth below surface); HER-25-24 - 17.8 m of 1.54% CuEq, beginning at 236 m downhole (112 m true depth below surface). The Leviathan Porphyry remains open for expansion to the southwest, where further step-out drilling is planned for the 2026 season. Reconnaissance drilling has now commenced at the Hook target, to test the strongest chargeability anomaly identified on the Property to date, with values up to 40 mV/V. The anomaly begins approximately 100 m below surface; however, a nearby existing access road is being utilized which requires an estimated 350-400 m drilled length to reach the target zone for the initial test. Encouraged by strong initial results at the Hook target, the Company has expanded the IP survey to seven lines covering 1.7 km of prospective strike length. The chargeability anomaly has now been traced across five completed lines, covering 1.2 km of strike length. The two most recent lines were extended to cross the Leviathan porphyry system as a calibration check, where they returned a near-identical geophysical response. Upon completion of the Hook survey, crews will move back to the Pegasus target to conduct a series of long east-west IP lines designed to test the full width of a major structural corridor, within which porphyry mineralization is interpreted to have been emplaced at the Hercules Property. The first drill hole at the Pegasus target, HER-26-02, has been completed. The hole intersected distal porphyry alteration, veining, and mineralization, analogous to early drilling completed at the Southern Flats target, prior to discovering strong copper mineralization to the west in HER-25-25. The upcoming IP survey will test for the presence of near surface chargeability approximately 2 km to the west of HER-26-02, along trend from the same structural zone hosting Southern Flats. HER-25-21 was completed from a 2025 RC pre-collar, and extended Leviathans footwall zone to the southwest with an intercept of 801.6 m of 0.40% CuEq (0.30% Cu, 82 ppm Mo, 5.3 g/t Ag, 0.01 g/t Au), including 21.3 m of 2.00% CuEq (0.22% Cu, 33 ppm Mo, 165.7 g/t Ag, 0.01 g/t Au), 107.8 m of 0.52% CuEq (0.43% Cu, 104 ppm Mo, 1.8 g/t Ag, 0.02 g/t Au), and 206.3 m of 0.45% CuEq (0.39% Cu, 98 ppm Mo, 0.7 g/t Ag, 0.01 g/t Au). HER-25-18 was also further extended downhole, following a brief winter drilling pause at the end of 2025. The final composite assay result for HER-25-18 is 787.9 m of 0.54% CuEq (0.43% Cu, 91 ppm Mo, 3.5 g/t Ag, 0.03 g/t Au), including 212.8 m of 0.89% CuEq (0.67% Cu, 128 ppm Mo, 10.2 g/t Ag, 0.05 g/t Au), and 57.4 m of 1.18% CuEq (1.06% Cu, 112 ppm Mo, 3.6 g/t Ag, 0.04 g/t Au). Table 1: Highlight Intervals: HER-25-18: 172.21 m to 960.12 m, interval 787.91 m, 0.43% Cu, 91 ppm Mo, 3.5 g/t Ag, 0.027 g/t Au, 0.54% CuEq; including 188.00 m to 400.81 m, interval 212.81 m, 0.67% Cu, 128 ppm Mo, 10.2 g/t Ag, 0.047 g/t Au, 0.89% CuEq; including 188.00 m to 245.36 m, interval 57.36 m, 1.06% Cu, 112 ppm Mo, 3.6 g/t Ag, 0.036 g/t Au, 1.18% CuEq. HER-25-21: 224.03 m to 1025.65 m, interval 801.62 m, 0.30% Cu, 82 ppm Mo, 5.3 g/t Ag, 0.010 g/t Au, 0.40% CuEq; including 224.03 m to 245.36 m, interval 21.33 m, 0.22% Cu, 33 ppm Mo, 165.7 g/t Ag, 0.005 g/t Au, 2.00% CuEq; including 427.09 m to 534.92 m, interval 107.83 m, 0.43% Cu, 104 ppm Mo, 1.8 g/t Ag, 0.023 g/t Au, 0.52% CuEq; including 661.42 m to 867.70 m, interval 206.28 m, 0.39% Cu, 98 ppm Mo, 0.7 g/t Ag, 0.009 g/t Au, 0.45% CuEq. HER-25-24: 236.52 m to 254.36 m, interval 17.84 m, 1.28% Cu, 20 ppm Mo, 19.7 g/t Ag, 0.039 g/t Au, 1.54% CuEq; and 283.46 m to 495.30 m, interval 211.84 m, 0.22% Cu, 83 ppm Mo, 1.9 g/t Ag, 0.005 g/t Au, 0.29% CuEq; including 283.46 m to 362.86 m, interval 79.40 m, 0.30% Cu, 32 ppm Mo, 3.9 g/t Ag, 0.004 g/t Au, 0.36% CuEq. A new 2026 IP survey at the Hook target has identified a strong, continuous, near-surface chargeability anomaly exhibiting a geophysical response strongly analogous to the Leviathan porphyry copper system in terms of scale, strength, geometry, and orientation. The anomaly is located approximately 3 kilometers east of, and subparallel to, the Leviathan porphyry system and its associated chargeability signature. To validate the comparison, IP lines 4 and 5 were extended to also cross over the Leviathan system as a calibration check, where they returned a highly comparable response, with both zones showing chargeability values ranging from 16-19 mV/V. Upcoming IP lines 6 and 7 will look to extend both the Hook and Leviathan anomalies further north. IP lines 1 through 3 were run exclusively across the Hook target, where the strongest chargeability anomaly on the Property has been returned, with values of up to 40 mV/V. Drilling has now commenced in hole HER-26-03, to test the area of strongest chargeability between IP lines 1 and 2. The anomaly begins within 100 m of surface on these lines; however, the first hole is collared from the nearest existing access road which requires an estimated 350-400 m drilled length to reach the target zone. If initial drilling is successful, the Company will evaluate options for permitting and constructing new temporary roads directly across the anomaly, to test where it comes closest to surface. HER-26-02 was collared within an approximately 3 kilometer wide structural corridor, distinguished by strongly elevated MT conductivity, which is host to both the Leviathan and the Southern Flats porphyry copper centers.