Hercules Metals drills 670.44 m of 0.45% Cu at Hercules

Executive Summary

• Hercules Metals released significant drill results from its 2025 exploration campaign at the 100%-owned Leviathan porphyry copper system in western Idaho.
• Drill hole HER-25-18 intersected a record 670.44 m of 0.45% Cu, 4.0 g/t Ag, and 95 ppm Mo, including 212.81 m of 0.67% Cu, 10.2 g/t Ag, and 128 ppm Mo.
• The intercept serves as a 200-metre stepout southwest of hole HER-25-15, demonstrating strong mineralization continuity and expanding the known footprint of the Leviathan system.
• Reconnaissance drilling south of Leviathan identified the "Southern Flats" target with significant Ag-Pb-Zn mineralization in the cover sequence, guiding future exploration vectors.

Key Details

• HER-25-18 Main Intercept: 670.44 m of 0.45% Cu, 4.0 g/t Ag, 95 ppm Mo.
• HER-25-18 High-Grade Interval: 212.81 m of 0.67% Cu, 10.2 g/t Ag, 128 ppm Mo.
• Depth & Status: Intercept begins at ~150 m true vertical depth below surface; hole extended beyond 842.65 m and is currently being extended as part of the 2026 campaign.
• Stepout Context: Represents a 200-metre stepout southwest of HER-25-15 (420.62 m of 0.60% Cu, 6.0 g/t Ag, 65 ppm Mo), confirming strong continuity across the growing Leviathan footprint.
• Future Drilling Plan: A further 200-metre stepout will be drilled from precollared hole HER-25-21 to target continuation along the southwestern trend.
• Southern Flats Target (HER-25-06): 10.7 m of 257.2 g/t Ag, 2.18% Pb, 4.62% Zn (420.5 g/t AgEq); within 119.9 m grading 31.2 g/t Ag, 0.29% Pb, 0.86% Zn (59.7 g/t AgEq).
• Reconnaissance Holes (HER-25-16, 22, 23): Encountered strong epithermal pathfinder elements in the cover sequence and distal skarn alteration in the underlying porphyry target sequence.
• Geophysical Surveys: Phase I & II magnetotelluric (MT) surveys outlined a conductivity corridor extending 5 km south of Leviathan, refining into discrete conductive centres that guide exploration vectors.
• Next Exploration Vector: Prospectivity vectors westward; currently testing with drill hole HER-25-25.
• Assay Methodology: Samples analyzed at MSA Labs (Elko, NV / Langley, BC) via IMS-230 method (ICP-MS/ES for 48 elements); higher grades re-analyzed via ICF-6 methods; gold analyzed via CPA-Au1 and FAS-111.

Notable Quotes

• Chris Paul, President & CEO: "HER-25-18 represents a significant leap forward in terms of scale and continuity at the Leviathan system. Intersecting 670 metres of continuous mineralization in a 200-metre stepout demonstrates dimensions well beyond our previous understandings of the system."
• Chris Paul: "In addition, we are now further extending the high-grade upper portion of the system, where mineralization begins at relatively shallow depths, and continuing to see strong potential for continued growth along strike to the southwest."
• Chris Paul: "With additional stepouts planned at Leviathan and a growing pipeline of high-priority targets across several kilometres of untested strike, we are focused on continuing to systematically expand the Leviathan discovery while vectoring in on new and exciting targets across our broader land package this season."