Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) has announced additional drilling results from its wholly owned Dumbwa copper deposit in Solwezi, Zambia, confirming continuous near-surface sulphide copper mineralization over 6.7 kilometres of strike. Drilling has now surpassed 260 holes and 56,855 metres, with five rigs actively expanding the deposit northward along strike and laterally to the east and west.
Key Drill Highlights
Notable intercepts include: DBW-26-200 intersected 0.42% copper over 21.6 metres; DBW-26-165 returned 0.51% copper over 13.7 metres; and DBW-26-150 yielded 0.38% copper over 25.0 metres. These results underscore the deposit's potential for high-grade mineralization within a broader mineralized system.
CEO Commentary on Deposit Scale
Midnight Sun’s President and CEO, Al Fabbro, stated: “To date, we have demonstrated that Dumbwa is, at a minimum, a 6,700 metre long and 600 metre to 1,000 metre wide, north-south, strain-controlled copper system. It is typically near, or at, surface, and extends to greater than 200 metres depth. It features a high-grade, central corridor ranging in width from 100 to 600 metres within a broader mineralized shell which can exceed 1,000 metres in width.”
Drilling Strategy and Grade Continuity
Fabbro added: “Our initial, discovery drilling is broadly spaced with holes positioned 50 to 100 metres apart on each of the east-west lines, with the lines spaced 100 to 200 metres apart north to south. As a result, on any individual line/section, it is expected that only 2 or 3 holes are positioned within the highest-grade corridor, while a higher percentage of holes are positioned in the lower-grade shells. It is evident from our work to date; the higher-grade core shows strong grades and continuity within individual segments of the deposit.”
Northern Expansion Progress
“As our drilling has progressed north of the disruption zone we just passed through, we are again seeing good development of visually strong copper mineralization and the northernmost holes we have reported today demonstrate the return of thick, higher-grade mineralization within the central corridor of the deposit,” Fabbro concluded.
Upcoming Technical Webinar
The Company will host a technical webinar with Midnight Sun’s COO, Dr. Kevin Bonel, to discuss the results on Tuesday, June 30th, 2026, at 10am PST.
Drilling Highlights Table
- DBW-26-200: 0.42% Cu over 21.64 m (from 0.36 to 22.00 m)
- DBW-26-180: 0.21% Cu over 21.00 m (from 0.00 to 21.00 m)
- DBW-26-177: 0.18% Cu over 25.50 m (from 3.50 to 29.00 m)
- DBW-26-176: 0.27% Cu over 24.30 m (from 3.00 to 27.30 m) and 0.27% Cu over 18.70 m (from 35.00 to 53.70 m)
- DBW-26-165: 0.51% Cu over 13.67 m (from 19.33 to 33.00 m)
- DBW-26-159: 0.25% Cu over 28.00 m (from 144.00 to 172.00 m)
- DBW-26-150: 0.38% Cu over 25.00 m (from 97.00 to 122.00 m), 0.25% Cu over 22.20 m (from 151.80 to 174.00 m), and 0.38% Cu over 14.00 m (from 195.00 to 209.00 m)
- DBW-26-142: 0.23% Cu over 17.93 m (from 197.07 to 215.00 m) and 0.26% Cu over 12.25 m (from 218.75 to 231.00 m)
Assay results are based on a four-acid digest with ICP-OES finish. Intervals listed are drilling intervals and are considered relative rather than true widths. The full table of assays including locations is available on the Company’s website.
