Silverco Announces Updated MRE for Cusi: 41 Moz AgEq M&I and 32 Moz AgEq Inferred

Executive Summary

• Silverco Mining released a validated 2025 Mineral Resource Estimate for its 100% owned Cusi Project, showing a 28% increase in Measured & Indicated (M&I) resources to 41.2 Moz AgEq and a 70% rise in Inferred resources to 31.8 Moz AgEq versus the historical 2020 estimate.
• The updated model applies tighter geological constraints (search radius reduced to 100 m, cut‑off raised to 120 g/t AgEq), delivering a more conservative but higher‑grade resource with an average 262 g/t AgEq in M&I categories—86% of the value is silver.
• The San Miguel Vein System emerges as a major growth driver, contributing 10.8 Moz AgEq (Indicated) and 16.2 Moz AgEq (Inferred); recent drilling not yet incorporated (e.g., hole CU‑25‑37) suggests further upside.

Key Details

• Measured & Indicated Resources: 4.89 Mt @ 262 g/t AgEq → 41.2 Moz AgEq (including 6.1 Moz Ag, 1.8 koz Au, 5.6 Mlb Pb, 6.3 Mlb Zn).
• Inferred Resources: 4.07 Mt @ 243 g/t AgEq → 31.8 Moz AgEq (including 22.5 Moz Ag, 22.2 koz Au, 79.5 Mlb Pb, 107.5 Mlb Zn).
• Grade Improvements vs. 2020:
• M&I grade up 22% (215 → 262 g/t AgEq)
• M&I tonnes up 9% (4.5 Mt → 4.9 Mt)
• Inferred tonnes up ~70% after methodological tightening.
• San Miguel Vein System:
• Indicated: 10.8 Moz AgEq
• Inferred: 16.2 Moz AgEq
• Methodology Changes: Search radius for Inferred reduced from 200 m to 100 m; cut‑off increased from 95 g/t to 120 g/t AgEq, yielding a more robust estimate focused on economically viable material.
• Drilling Highlights Not Yet Modeled: Hole CU‑25‑37 – 8.8 m @ 319 g/t AgEq and 12.4 m @ 273 g/t AgEq; additional 2025 drill results expected to further boost the resource.
• Technical Review: Estimated by Ben Eggers, MAIG, P.Geo., SGS Geological Services; peer‑reviewed by Allan Armitage, Ph.D., P.Geo.; disclosed under NI 43‑101.
• Assumptions for Base‑Case Cut‑off (120 g/t AgEq):
• Metal prices: US$30/oz Ag, US$2,400/oz Au, US$1.00/lb Pb, US$1.35/lb Zn
• Recoveries: 90% Ag, 50% Au, 90% Pb, 60% Zn
• Mining cost: US$60/t rock; processing & G&A: US$35/t mineralized material.
• Sensitivity Table: Shows resource tonnage and grade variation across cut‑offs from 80 g/t to 300 g/t AgEq, illustrating robustness of the estimate.

Notable Quotes

“This validated and updated Mineral Resource Estimate represents a crucial step in our development of Cusi towards a restart decision… The grade profile remains exceptional at over 260 g/t AgEq in the Measured and Indicated categories.” – Mark Ayranto, CEO

“Most importantly, this MRE confirms what our exploration success at San Miguel has been telling us. This zone now hosts a substantial portion of our resource and exhibits the widths and continuity required for more efficient bulk mining methods.” – Mark Ayranto, CEO