Core Silver releases Laverdiere soil sampling results

Executive Summary

• Core Silver’s 2025 soil‑sampling program delineated a multikilometre copper‑molybdenum (Cu‑Mo) mineralized corridor at Laverdière, extending known mineralization 1.7 km northwest of the Main skarn zone and confirming district‑scale potential.
• Anomalies up to 394 ppm Cu and 227 ppm Mo—over ten times background—were identified across a corridor up to 1.75 km wide, with direct overlap on historic high‑grade zones, strengthening confidence in continuity of the system.
• Two new priority targets (Anomalies Y and Z) were defined for future drilling, and integrated data point toward a large, open‑at‑depth Cu‑Mo porphyry‑skarn system that now spans >5 km laterally and depths >1,000 m.

Key Details

• Soil survey covered 1.4 km × 5.6 km, collecting 231 samples on a 200 m × 200 m grid (≈0.04 km² per sample).
• Peak soil assay values: 394 ppm Cu, 227 ppm Mo; anomalies >10× local background.
• Sample counts above thresholds:
• Mo – 78 samples >10 ppm, 32 >25 ppm, 14 >50 ppm, 2 >100 ppm.
• Cu – 102 samples >30 ppm, 55 >50 ppm, 23 >100 ppm, 11 >150 ppm.
• Modified Porphyry Index (MPIx) calculated per Bouzari et al. (2022) using Cu, Mo, W, Sn, Sb, Tl, Ag, As, Li values.
• Soil horizons sampled were primarily B and C; where absent, talus fines or shallow organics (Ah) were taken.
• New priority targets: Anomalies Y & Z exhibit strong Cu‑Mo signatures; slated for upcoming drill program.
• Integrated geochemistry, structural mapping, and geophysics suggest a large porphyry‑skarn system open in multiple directions and at depth.
• Historical context: prior drilling (2022) returned up to 48.5 m @ 0.90 % Cu, 6 g/t Ag, 0.11 g/t Au; historic adit work showed up to 27 m @ 1.20 % Cu.
• Ongoing 2025 diamond drilling (7 holes, 3,857 m) across five target areas—assay results pending.

Notable Quotes

“We have now confirmed the presence of a large, coherent copper‑molybdenum system extending over five kilometres… These zones provide a clear road map for future drill targeting and enhance the discovery potential at Laverdière as we advance the project.” – Nick Rodway, President & CEO

All technical information has been reviewed and approved by Nick Rodway, P.Geo., qualified person under NI 43‑101.