High-Resolution Ground Magnetics Unlocks New Drill Targets at Dumbwa Company now extending magnetic survey over entire Dumbwa anomaly
High-Resolution Ground Magnetics Unlocks New Drill
Targets at Dumbwa
Company now extending magnetic survey over entire Dumbwa
anomaly
Vancouver, British Columbia, August 6, 2026 – Midnight Sun Mining Corp. (TSXV:
MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to announce that
an initial high -resolution ground magnetic survey on its wholly owned Dumbwa copper
deposit, located in Solwezi, Zambia, has identified multiple new exploration targets outside
the previously defined and drilled mineralized corridor.
The magnetic survey covered an area of approximately 2.7 kilometres (“km”) by 2.5 km in
the northern portion of Dumbwa’s Central Mineralized Block. Data was collected along
north-south survey lines spaced 100 metres (“m”) apart, with east -west tie lines spaced at
250 m intervals (Figures 1 and 2).
The survey successfully identified distinct magnetic signatures associated with drill
confirmed copper mineralization. These same signatures appear in areas off the known
mineralized corridor that had not been previously identified or tested yet. Visuals from initial
testing of one such newly identified ground magnetic anomaly appears to support the
correlation. Based on these results, Midnight Sun is extending the high-resolution magnetic
survey across the full ~20 km copper-in-soil anomaly.
The expanded survey is designed to both refine existing targets and identify additional
prospective areas of mineralization along parallel and sympathetic structural corridors with
potential to host basement-hosted sulphide copper mineralization.
Midnight Sun’s COO, Kevin Bonel, states, “We are encouraged by how effectively this ground
magnetic survey has enhanced our understanding of the structural architecture of the
Dumbwa deposit and its relationship to higher -grade minerali zed zones. Importantly, the
survey has allowed us to ‘fingerprint’ the magnetic signature associated with the Central
higher-grade block and identify several analogous targets east of the main minerali zed
corridor. These targets will be prioritised for future drill testing and provide a compelling
opportunity to identify significant additional copper minerali zation and further expand
Dumbwa’s rapidly growing footprint.”
Magnetic Survey Identifies New Drill Targets
The initial survey produced two key findings. First, the survey identified a distinctive pattern
of rapidly changing magnetic intensity within the northern portion of the Central Mineralized
Block, an area that has previously returned several significant copper intercepts, including:
• DBW-25-148: 21.0 m at 0.33% Cu
• DBW-25-149: 17.8 m at 0.85% Cu
o and 21.4 m at 0.38% Cu
• DBW-26-123: 80.0 m at 0.39% Cu
This magnetic signature is interpreted to be associated with the geological and structural
setting that hosts copper sulphide mineralization at Dumbwa and may provide a valuable
exploration tool for identifying additional areas of prospectivity.
Second, the survey allows for the better identification of late -stage faulting that may offset
mineralization across Dumbwa. Incorporating this structural information into drill planning
is expected to improve the positioning of future drill collars for mo re effective testing of the
main Dumbwa mineralized corridor.
The survey has already generated two new, untested targets for basement-hosted sulphide
copper mineralization. These targets are located approximately 1 – 1.2 km east of the main
Dumbwa mineralized corridor and display magnetic characteristics similar to t hose
observed in areas that have already returned higher-grade copper mineralization.
Drilling to test these targets is planned as part of Dumbwa’s Phase 2 exploration program,
scheduled to begin in Q3 2026 (Figures 3-6).
The survey has also identified a similar magnetic pattern west of the main Dumbwa
mineralized corridor. This may represent an additional prospective structural corridor, and
targets in this area are currently being evaluated for potential inclusion in the Phase 2
exploration program.
Geological Interpretation
The distinct, rapidly changing magnetic patterns observed within the Central Mineralized
Block and at the newly identified targets are interpreted to reflect variations in the underlying
lithology and structural architecture.
Competent feldspar pegmatites and amphibolites, which commonly contain higher
concentrations of magnetite, are interpreted to define the margins of high-strain domains.
These high-strain domains contain lower-magnetite schists that are interpreted to host the
copper sulphide mineralization at Dumbwa.
Within the survey area, positive magnetic anomalies also show a spatial relationship with
the mineralized structural corridor that constrains the known Dumbwa sulphide copper
occurrences.
In addition, preliminary interpretation indicates a positive relationship between magnetic
intensity and zones of more intense copper sulphide mineralization observed in drill core
and assay results. This relationship is most apparent in the analytical sig nal data but can
also be observed in total magnetic intensity, first vertical derivative, and second vertical
derivative datasets.
These results support the Company’s previous interpretation that the Dumbwa mineralized
corridor is associated with a north-south oriented positive magnetic anomaly. The high-
resolution magnetic survey may therefore provide an effective tool for refining drill targeting
and guiding future exploration along the full ~20 km strike extent of the Dumbwa anomaly.
Diurnal correction was done using a fixed magnetometer and two mobile units were
employed to acquire magnetic data within the survey area.
Figure 1. Location of High Resolution Ground Magnetic Survey over the Dumbwa Mineralized Unit. The dashed outline is the
magnetic unit identified that relates directly to mineralization.
Figure 2. Analytical Signal ground magnetics showing the strong relationship of high magnetic readings and higher grade
mineralization in the Central Block. Note the two very similar looking target areas.
Figure 3. Total Magnetic Intensity ground magnetics showing the strong relationship of high magnetic readings and higher
grade mineralization in the Central Block. Note the two very similar looking target areas
Qualified Person: Darin Labrenz, P.Geo., a consulting geologist for the Company and
Qualified Person under NI 43-101, has reviewed and approved the technical data and
contents of this release.
About Midnight Sun
Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our
flagship Dumbwa copper deposit. The Project is located near the town of Solwezi in
the heart of the Zambia–Congo Copperbelt, the world’s second-largest copper-
producing region. This prolific mining district is renowned for hosting multiple
major copper deposits, and benefits from excellent infrastructure, an established
mining workforce, and a long history of successful production.
The Solwezi Copper Project is surrounded by producing copper mines, including the
geologically similar Lumwana mine just west of our project and First Quantum’s
Kansanshi mine - Africa’s largest integrated metallurgical processing facility ,
approximately 6 kilometres east of the company’s recently announced Kazhiba Oxide
Resource. This highly favourable location highlights the district -scale potential of
Midnight Sun’s land package.
The Dumbwa copper deposit underlays a robust 20 -kilometre copper -in-soil
anomaly, and ongoing drilling has demonstrated strong geological similarities to the
nearby Lumwana mine, underscoring the potential scale of this new copper system.
Led by an experienced geological team with a proven track record of major
discoveries in the Zambia –Congo Copperbelt and globally, Midnight Sun’s goal is to
delineate Zambia’s next generational copper deposit.
ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.
Al Fabbro
President & CEO
For Further Information Contact:
Adrian O’Brien
VP Business Development and Communications
Tel: +1 604 809 6890
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