Midnight Sun Intercepts 7.39% Cu over 14.86m Including 16.9% Cu over 4m at Kazhiba Main

Rhea-AI Summary

Midnight Sun (OTCQX: MDNGF) reported initial assays from eight 2025 diamond holes at Kazhiba Main, highlighting a standout intercept of 7.39% Cu over 14.86 m including 16.9% Cu over 4.0 m from 17.00–31.86 m. The 2025 resource-edge campaign at Kazhiba Main is complete with 163 holes totalling 5,243 m. Assays from the 2025 RC program are pending and will feed a maiden NI 43-101 resource estimate expected in Q4 2025. A due-diligence diamond re-drill (41 holes) was completed to verify 2024 RC intervals after contractor sampling issues; early results show the previously reported 'voids' are absent and, in some cases, contain copper mineralization. Kazhiba East RC drilling has started, with a planned 100-hole program testing three PIL soil anomalies.

Positive

• Intercept of 7.39% Cu over 14.86 m including 16.9% Cu over 4.0 m
• Completed 163-hole resource-edge campaign totalling 5,243 m
• Maiden NI 43-101 resource expected in Q4 2025
• Due-diligence diamond re-drill (41 holes) confirmed missing intervals

Negative

• 2024 RC program recorded multiple 'no sample return' intervals due to contractor issues
• Key 2025 RC assay results are still pending, delaying full resource calculation

The Company also announces that RC drilling on Kazhiba Main has been completed, and RC drilling at Kazhiba East Targets has been initiated.

Vancouver, British Columbia--(Newsfile Corp. - November 4, 2025) - Midnight Sun Mining Corp. (TSXV: MMA) (OTCQX: MDNGF) ("Midnight Sun" or the "Company") is pleased to announce that initial assay results, representing eight diamond drill holes from the 2025 drilling campaign on the Kazhiba Main target, have been received. This drilling has intercepted new zones of significant oxide copper mineralization within the existing mineralized footprint, including hole MSZ-25-029E which intercepted 7.39% copper over 14.86m including 16.9% over 4m extending from 17m to 31.86m depth. Ongoing diamond drilling is part of a due diligence component of the oxide drill program, bracketing several previously drilled reverse circulation ("RC") holes.

The 2025 resource-edge definition campaign at Kazhiba-Main is now complete, with 163 holes totalling 5,243m. Assays for the 2025 RC program are pending and will be incorporated into a maiden NI 43-101 resource estimate, with expected completion in Q4 2025. Diamond drilling at Kazhiba Main is expected to continue through the end of November 2025.

Midnight Sun's President & CEO, Al Fabbro, states: "We are quickly and systematically marching Kazhiba toward a maiden resource, due before the end of the year. Kazhiba Main is an extraordinary, high-grade, near surface opportunity, and our team has taken all the right steps to properly define this unique, highly variable, oxide copper deposit. A key part of that process is the necessary due diligence required to establish a solid understanding of the mineralized footprint, including the diamond re-drill which is being completed expeditiously. Not only is it providing the necessary data, but also giving us some impressive results along the way, and further expanding the incredible opportunity at Kazhiba."

The 2025 Kazhiba-Main drilling program was designed to follow up the 2024 RC drilling program by further defining the mineralized footprint and exploring for expansion potential of the mineralized area. The company also launched a due diligence diamond drilling campaign within the mineralized footprint to test and verify several intervals from the 2024 RC drilling campaign at Kazhiba Main.

The company also announces that the Kazhiba East RC drilling program is now underway. The Kazhiba East drilling program is designed to test three Partial Ionic Leach soil sample copper anomalies from the 2024 campaign and is planned to comprise of a total of 100 RC drill holes. The three Kazhiba East target areas have the same characteristics and geological profile as Kazhiba Main, thus representing expansion potential for more near-surface oxide resources at Kazhiba.

2025 Resource Upgrade and Due Diligence Diamond Drilling at Kazhiba Main:

During the 2024 RC drilling program, the company completed 58 drill holes which returned high-grade intervals including:

• 10.69% copper over 21.0 metres from drill hole MSZ22-028
• 5.60% copper over 26.0 metres from drill hole MSZ22-020
• 3.01% copper over 15.0 metres from drill hole MSZ22-012
• 4.66% copper over 7.0 metres from drill hole MSZ22-030

A number of drill intervals with "no sample return" were reported in 2024 and were interpreted as potential cavities within the mineralized footprint. However, Midnight Sun's geological team identified the improbability of the reported subsurface cavities where no material was being returned. It was confirmed that the drilling contractor encountered technical issues while drilling wet soils which led to the misidentification of these sections as voids. The drilling contractor was instructed to implement a due-diligence diamond redrill program whereby 41 holes are being redrilled by diamond drilling methods to obtain a complete soil profile and verify mineralization, rectifying the sampling issue at the driller's cost. Early observations are that the voids do not exist and, in some cases, may in fact be significant copper intercepts. The Company expects positive results from the due diligence diamond drilling to have a significant impact on the maiden resource estimate.

Kazhiba Main Intercepts from Due Diligence Redrilling

Hole ID	From (m)	To (m)	Interval (m)	Cu (%)
MSZ-25-020N	14	15.6	1.6	0.21
MSZ-25-020S	18	19	1.0	3.35
MSZ-25-020W	16	20	4.0	0.32
MSZ-25-020E	-	-	-	NSR
MSZ-25-029N	28.0	28.8	0.8	0.30
MSZ-25-029S	15	16.2	1.2	5.58
MSZ-25-029E	17.00	31.9	14.86	7.39
including	24.00	28.00	4.00	16.90
MSZ-25-029W	-	-	-	NSR

 

See cross section Figure below.

Location of the reported diamond drill holes, and the 2024 RC Holes they were designed to test:

Hole ID	Year Drilled	Drill Type	East	North	Elev. (m)	Azimuth	Dip	EOH (m)
MSZ22-020	2024	RC	422349.84	8661759.73	1389.61	360	-90	40
MSZ22-029	2024	RC	422351.77	8661707.70	1388.59	360	-90	49
MSZ22-020-N	2025	Diamond	422348.73	8661764.65	1389.68	360	-90	16.7
MSZ22-020-E	2025	Diamond	422354.61	8661759.85	1389.52	360	-90	16.8
MSZ22-020-W	2025	Diamond	422344.91	8661759.16	1390.05	360	-90	25.25
MSZ22-020-S	2025	Diamond	422350.64	8661754.67	1389.64	360	-90	21
MSZ22-029-S	2025	Diamond	422352.19	8661702.60	1388.71	360	-90	18.3
MSZ22-029-N	2025	Diamond	422350.37	8661712.73	1388.68	360	-90	31.2
MSZ22-029-W	2025	Diamond	422346.86	8661706.34	1388.82	360	-90	17.5
MSZ22-029-E	2025	Diamond	422356.58	8661709.55	1388.83	360	-90	34.5

 

Note: Projection WGS 84, Zone 25 South.

Comparative cross-sectional view of Kazhiba Main Drilling with recent 2025 Due Diligence drilling results:

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2553/273025_cccb488194d7299b_001full.jpg

Note: Upper figure illustrates results from 2024 RC drilling with originally interpreted 'cavities': lower figure highlights the positive copper results along with verification that cavities are absent from 2025 diamond hole MSZ-25-DD-029.

Plan Map illustrating Kazhiba East Partial Ionic Leach Targets and Outline of Planned RC Drilling targets

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2553/273025_cccb488194d7299b_002full.jpg

Note: Projection WGS 84, Zone 35 South.

Quality Control/Quality Assurance

Drilling was conducted using a conventional diamond drilling rig and drill core was captured for the entirety of each hole and placed into plastic core trays. All drill holes were cored in PQ size and sampling was conducted over the entire hole on one-meter intervals while honouring any important lithological boundaries. Unconsolidated soils were split in half by hand inside each core box, while bedrock was cut in house using a diamond saw and the right half of core was selected for sampling. All samples were placed into a 200 micron plastic bag, assigned a unique sample number, and recorded into GeoSpark logging system. Samples always remained under the supervision of Midnight Sun staff to maintain chain of custody. All samples were then delivered to SGS Labs located in Kalulushi, Zambia, a fully accredited laboratory. Once received, the samples are sorted, dried, crushed, and pulverized (SGS code PRP90) followed by a single acid digest with AAS finish (SGS Code AAS72C). Copper range of detection is 0.01-20%. Over limit samples were rerun by Electrogravimetric method whereby electrolysis of Cu occurs from a digested 1 gram charge and is finished electro-gravimetrically (SGS Procedure ELC13GD). Midnight Sun follows an in-house QA/QC program that consists of a random insertion every 10^th sample of either a coarse blank, fine blank, coarse duplicate, fine duplicate, or Certified Reference Material (standards).

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 focused on exploring our flagship Solwezi Project, located in Zambia. Situated in the heart of the Zambia-Congo Copperbelt, the second largest copper producing region in the world, our property is vast and highly prospective. Our Solwezi Project is surrounded by producing copper mines, including Africa's largest copper mining complex right next door, First Quantum's Kansanshi Mine. Led by an experienced geological team with multiple discoveries and mines around the world to their credit, Midnight Sun's goal is to find and develop 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
Em: adrian@midnightsunmining.com

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.

This news release contains "forward-looking statements" within the meaning of the applicable Canadian securities legislation that are based on expectations, estimates, assumptions, geological theories, and projections as at the date of this news release. The information in this news release about any information herein that is not a historical fact may be "forward looking statements." Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (which may, but not always, include phrases such as "anticipates", "plans", "scheduled", "believed" or "intends" or variations of such words and phrases or stating that certain actions, events or results "may" or "could", "would", "might" or "will" be taken to occur or be achieved) are not statements of historical fact and may be forward-looking statements and are intended to identify forward-looking statements.

Although the forward-looking statements contained in this news release are based upon what management believes, or believed at the time, to be reasonable assumptions, the Company cannot assure readers that actual results will be consistent with such forward-looking statements, as there may be other factors that cause results not to be as anticipated, estimated or intended. Such factors include, among others, risks relating to the timing and ability of the Company to obtain and the timing of the approval of relevant regulatory bodies, if at all; risks relating to property interests; risks related to access to the project; risks inherent in mineral exploration, including the fact that any particular phase of exploration may be unsuccessful; the availability of contractors; geo-political risks; the global economic climate; metal prices; environmental risks; political risks; and community and non-governmental actions. Neither the Company nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking statements. The Company does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/273025

FAQ

What copper grade did Midnight Sun report at Kazhiba Main on November 4, 2025 (MDNGF)?

Diamond hole MSZ-25-029E returned 7.39% Cu over 14.86 m, including 16.9% Cu over 4.0 m.

When will Midnight Sun publish a maiden NI 43-101 resource for Kazhiba (MDNGF)?

The company expects to complete a maiden NI 43-101 resource estimate in Q4 2025.

How much drilling was completed in the 2025 Kazhiba Main campaign (MDNGF)?

The 2025 resource-edge program at Kazhiba Main comprised 163 holes totalling 5,243 m.

What due-diligence work did Midnight Sun perform after 2024 RC issues (MDNGF)?

Midnight Sun initiated a 41-hole diamond re-drill program to verify 2024 RC intervals and address sampling problems at the driller's cost.

What is the plan for Kazhiba East drilling and how many holes are planned (MDNGF)?

Kazhiba East RC drilling has begun and is planned to include 100 RC holes testing three PIL soil copper anomalies.

Were the reported 2024 'voids' at Kazhiba Main confirmed (MDNGF)?

Early diamond re-drill results indicate the previously reported subsurface 'voids' are absent and some intervals contain copper mineralization.