Midnight Sun Confirms Dumbwa System With Initial Copper Intercepts

Executive Summary

• Midnight Sun Mining reported significant initial copper intercepts in the Dumbwa target, including 0.51 % Cu over 39.7 m (1.13 % Cu over 7 m) from hole DBW‑25‑007.
• Additional holes (DBW‑25‑009 and DBW‑25‑010) confirmed multiple parallel near‑vertical shear zones and extended mineralization laterally, indicating a large, open system along the ~20 km strike length.
• The company plans continued diamond drilling northward while assay results for the step‑out holes are being rush‑ordered.

Key Details

• Hole DBW‑25‑003: 0.48 % Cu over 25.9 m; also 0.29 % Cu over 5.2 m in shear‑zone mineralization.
• Hole DBW‑25‑007 (500 m south of DBW‑25‑003):
• 0.51 % Cu over 39.7 m, including a high‑grade core of 1.13 % Cu over 7 m.
• Additional intervals: 0.33 % Cu over 23 m and 0.31 % Cu over 16 m.
• Step‑out holes:
• DBW‑25‑009 (50 m east) intersected three distinct mineralized shear zones, adding a new parallel zone.
• DBW‑25‑010 (120 m west) confirmed up‑dip continuation of mineralization over broad intervals and identified further western zones.
• Assay methodology: Four‑acid digest with ICP‑OES finish (SGS Code ICP42S); detection range 0.01–10 % Cu. QA/QC includes blanks, duplicates, and certified reference materials inserted every 10th sample.
• Geological interpretation: Multiple near‑vertical, parallel to sub‑parallel shear zones remain open east, west, and along the full ~20 km strike length of the Dumbwa target.
• Drilling logistics: Conventional diamond rig; core captured in PQ then HQ size; samples processed at SGS Labs, Kalulushi, Zambia.
• Qualified Person: Darin Labrenz, P.Geo., reviewed and approved technical data under NI 43‑101.

Notable Quotes

“We have successful initial intercepts confirming sulphide copper mineralization at Dumbwa… We do not believe we have reached the heart of the system yet…” – Kevin Bonel, COO, Midnight Sun Mining Corp.