Core Silver Extends High-Grade Silver-Polymetallic Sulphide Mineralization at the Jackie Target

Executive Summary

• Core Silver completed three diamond drill holes (564 m total) at the Jackie Target, intersecting extensive high‑grade silver‑zinc‑lead‑copper mineralization and confirming continuity with 2022 intercepts.
• Assays are pending, but historic surface samples from the area have returned ultra‑high grades (up to 1,090 g/t Ag).
• The company also announced the resignation of Director Andrew Carne and entered a $1 M consulting services agreement with Upswitch Media for marketing and investor‑relations support.

Key Details

• Drill Program: Three holes – SLM25‑067 (275 m), SLM25‑068 (214 m), SLM25‑069 (75 m) – completed in 2025 on a >150‑m NW‑SE trend at the Jackie Target.
• Hole SLM25‑067: Intersected repetitive argentiferous galena and sphalerite zones over >150 m; confirmed continuity of mineralization intersected in 2022 to a true depth of 182 m (211 m drilled). Assays pending.
• Hole SLM25‑068: Targeted Ag‑rich galena‑pyrite veins in a Cretaceous mafic intrusion; intersected moderate‑to‑high density veining over 32 m. Surface sample from 2024 returned 216 g/t Ag, 12 % Pb, 0.11 % Cu and 115 ppm Te. Assays pending.
• Hole SLM25‑069: Additional intersected zones of classic carbonate replacement mineralization (CRM) and polymetallic veining; assays pending.
• Historical High‑Grade Surface Samples (context):
• 1,090 g/t Ag with >20 % Pb, 5.73 % Zn, 2.0 % Cu (2021).
• 767 g/t Ag, 48.3 % Pb, 1.7 % Zn, 1.12 % Cu (2024).
• 583 g/t Ag, 40.8 % Pb, 1.24 % Zn, 2.42 % Cu (1990).
• Program Significance: Demonstrates multiple high‑grade silver‑bearing polymetallic styles across diverse lithologies; target remains open at depth and laterally, indicating scalability within the Blue Property.
• Director Resignation: Andrew Carne resigned from the Board of Directors effective immediately; the Board thanked him for his service.
• Marketing Services Agreement: Updated consulting agreement with Upswitch Media Corp., effective Oct 1 2025; total payable $1 M (plus GST) in four monthly installments of $250,000. Services include copywriting, ad design, translation, campaign execution, and analytics. Upswitch does not currently hold Core Silver securities.
• CEO Quote: “Jackie continues to demonstrate the scale and grade potential that makes the Blue Property so unique… confirms Jackie as a highly prospective and expandable target.”

Notable Quotes

“The ability to intersect multiple styles of silver‑rich mineralization at depth, directly beneath ultra‑high‑grade surface exposures, confirms Jackie as a highly prospective and expandable target.” – Nick Rodway, President & CEO

All forward‑looking statements are subject to risks and uncertainties; actual results may differ materially.