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Phase Two builds on Phase One, launching a highly targeted approach to expand the Dumbwa mineralized system
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VANCOUVER, British Columbia, Sept. 02, 2026 (GLOBE NEWSWIRE) — Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to announce the commencement of its Phase Two exploration program at the Company’s wholly-owned Dumbwa copper deposit in Zambia.
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Phase Two represents the transition from the successful systematic evaluation of the Dumbwa mineralized corridor undertaken during Phase One, to a highly targeted exploration strategy designed to identify and expand higher-grade zones of copper mineralization, extend known mineralization laterally and along strike, and test newly identified prospective structures outside the currently defined corridor.
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The Phase Two program will integrate high-resolution ground magnetics, dipole-dipole induced polarization geophysics (“IP”), soil geochemistry, and diamond drilling.
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Kevin Bonel, Midnight Sun’s COO, states: “Phase One has given us the tools and geological understanding to test Dumbwa at a level of precision that simply wasn’t possible when the program began. The program was designed to rapidly and systematically establish the scale and geological architecture of Dumbwa. After nearly 75,000 metres of drilling, we have built a dataset that is fundamentally underpinning exploration going forward. We are seeing distinct zones of enhanced copper mineralization along the main corridor, including areas of higher grade, and our new magnetic survey is identifying positive geological signatures beyond the areas we have previously tested. This gives us the ability to transition from our Phase One systematic drilling program to a much more highly targeted exploration approach.
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Phase Two applies the geological understanding gained in Phase One to sharpen our targeting and focus on the most prospective parts of the Dumbwa system. That means expanding known mineralization, testing the northern extent of the main mineralized corridor, exploring the potential for higher-grade zones and, importantly, determining whether the structures we are identifying east and west of Dumbwa represent additional mineralized corridors.”
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Phase One drilling remains underway and is expected to be completed by the end of Q3 2026. Applying this new targeted approach, drilling has shifted to the northern block, where wider step-outs are designed to rapidly identify additional zones of higher-grade copper mineralization throughout the initial 11.5 km Dumbwa corridor.
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The systematic nature of Phase One has generated an extensive geological, geochemical and geophysical dataset across the tested portion of the Dumbwa system. Drilling has defined distinct blocks of enhanced copper mineralization along the north-south corridor, including several higher-grade domains within the broader mineralized system.
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Phase Two intends to leverage this growing dataset to focus drilling on the highest-priority targets, both within the Dumbwa mineralized corridor and along prospective structures to the east and west. The Company will also extend selected existing drill fences beyond the presently tested east-west limits of known mineralization.
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Phase One – Testing Dumbwa and Building the Dataset
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Midnight Sun commenced Phase One exploration at Dumbwa on August 6th, 2025, with the objective of methodically and systematically testing the Dumbwa mineralized corridor to establish the geological and structural framework necessary to guide subsequent exploration.