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Midnight Sun Mining (TSXV: MMA) has reported a significant expansion of its Dumbwa copper deposit in Zambia, with recent drilling more than doubling the width of the mineralized corridor in the northern block to over 2.4km.
The latest results form part of the company’s ongoing Phase Two exploration programme and continue to demonstrate near-surface copper sulphide mineralization across a strike length exceeding 12km. Drilling remains underway, with the Dumbwa system still open to the north and south, while approximately 70 drill holes remain pending assay results.
Recent highlights included:
- 31.1m grading 0.47% copper, including 16m at 0.81% copper (DBW-26-283)
- 11m grading 0.67% copper (DBW-26-261)
- 7m grading 1.05% copper (DBW-26-355)
- 14m grading 0.48% copper (DBW-26-266)
Dr. Kevin Bonel, COO of Midnight Sun Mining, commented, “As drilling progresses north, we appear to have passed through another structural disruption and are now encountering copper sulphide mineralization across significantly greater east-west widths, with locally increased mineralized thicknesses. These observations are providing exciting insight into the geological architecture of the Northern Block and will help guide our ongoing exploration of this expanding system.”
查看配图：Midnight Sun Doubles Width of Dumbwa Copper Deposit as Drilling Expands Northern Zone
The company has now received results from 76 drill holes totalling 17,373m, covering both expansion and delineation drilling. Management noted that mineralization remains flat-lying to shallowly dipping and is located at or near surface, characteristics that could support future development studies.
President and CEO Al Fabbro highlighted the progress made since exploration began at Dumbwa, stating: “Phase One was designed to rapidly and systematically establish scale and outline the geological architecture of Dumbwa. I am extremely proud of what our team has accomplished, demonstrating more than 12km of mineralized strike length in just 14 months.
“Importantly, our ongoing drilling is now identifying a significant expansion of the mineralized system in the north, along with distinct zones of enhanced copper mineralization throughout the main corridor. The geological insights gained through Phase One are now allowing us to focus Phase Two drilling on the most prospective areas of the Dumbwa system.”
The completed Phase One field programme comprised 372 diamond drill holes for more than 87,000m of drilling, successfully outlining copper sulphide mineralization along over 12km of the Dumbwa Mineralized Corridor. The broader Dumbwa target extends for approximately 20km and is located immediately south of First Quantum Minerals’ Kansanshi Mine.
Midnight Sun noted that assay turnaround times have been affected by processing delays at contracted laboratories. Around 5,000 samples representing 70 drill holes remain outstanding, with additional results expected in the coming weeks.
Current Phase Two drilling is focused on the northern block, where the company continues to encounter encouraging mineralized widths and locally stronger copper grades while also conducting soil sampling to identify additional targets beyond the existing corridor.
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