Magna Mining Announces Initial Mineral Reserves for the McCreedy West Mine in Sudbury, Ontario

Executive Summary

• Magna Mining announced initial NI 43‑101 compliant Probable Mineral Reserves of 987,000 t (1.59% Cu, 0.32% Ni, 0.01% Co, 1.15 g/t Pt, 1.23 g/t Pd, 0.32 g/t Au, 6.65 g/t Ag) for the McCreedy West Mine.
• The company also disclosed Indicated Mineral Resources of 5.63 Mt and Inferred Mineral Resources of 874,000 t across the same property, supporting a three‑year production profile for its 700/PM Copper‑PGE zones.
• Reserves are based on metal price assumptions (e.g., $4.88/lb Cu, $7.72/lb Ni) and operating cost of CAD $180 per short ton; the estimate underpins guidance for 2026 production and future expansion plans.

Key Details

• Probable Mineral Reserves – 987,000 t @ 1.59% Cu, 0.32% Ni, 0.01% Co, 1.15 g/t Pt, 1.23 g/t Pd, 0.32 g/t Au, 6.65 g/t Ag.
• Indicated Mineral Resources – 5,632,000 t @ 1.10% Cu, 0.98% Ni, 0.03% Co, 0.82 g/t Pt, 0.92 g/t Pd, 0.23 g/t Au, 5.15 g/t Ag.
• Inferred Mineral Resources – 874,000 t @ 1.37% Cu, 1.00% Ni, 0.02% Co, 1.26 g/t Pt, 1.24 g/t Pd, 0.26 g/t Au, 4.12 g/t Ag.
• Production Profile – The reserves support an initial three‑year mining schedule for the 700/PM Copper‑PGE zones, assuming rates consistent with current operations and 2026 guidance.
• Mining Methodology – Long‑hole stoping with unconsolidated rock backfill; minimum stope width 5 ft plus 1.5 ft dilution each side; 85% stope recovery factored into tonnage/grade.
• Cost Assumptions – Operating cost CAD $180 per short ton; cut‑off grades based on Net Smelter Return exceeding sustaining development, equipment and fixed plant capital costs.
• Metal Price Assumptions for Reserves: Cu $4.88/lb, Ni $7.72/lb, Co $18.12/lb, Pt $1,410/oz, Pd $1,156/oz, Au $3,815/oz, Ag $50/oz; recoveries: Cu 91%, Ni 85%, Co 68%, Pt 64%, Pd 69.5%, Au 70.5%, Ag 70%.
• Qualified Persons – Reserve estimate supervised by William van Breugel, P.Eng., and Henri Gouin, P.Eng.; Resource estimates prepared by Allan Armitage, Ph.D., P.Geo., and Jonathan Cirelli, P.Geo.; all NI 43‑101 qualified.
• Technical Report – To be filed within 45 days of this release.

Notable Quotes

“We are proud to be able to announce our Mineral Reserves for the McCreedy West Mine… These Mineral Reserves will support an initial three‑year production profile…” – Jason Jessup, CEO

All non‑material boilerplate, forward‑looking statements, and corporate background have been omitted per instructions.