Midnight Sun Confirms Dumbwa System With Initial Copper Intercepts
Midnight Sun Mining (OTC:MDNGF) has announced significant copper mineralization discoveries at its Dumbwa Target. Initial drilling results revealed notable intercepts including 0.51% Cu over 39.7 meters (including 1.13% Cu over 7m) and 0.48% Cu over 25.9 meters.
The drilling program, designed to test geological models across the ~20-kilometer strike-length target, confirmed mineralized sulphide copper systems at depth. Key holes DBW-25-003 and DBW-25-007 demonstrated shear zone-controlled mineralization, with continuous copper sulphides observed over 150m. Follow-up holes DBW-25-009 and DBW-25-010 confirmed multiple parallel shear zones with near-vertical orientation.
The geological model indicates multiple near-vertical, parallel to sub-parallel shear zones, remaining open to the east and west. The company's COO compared the findings to early exploration patterns at Lumwana's Lubwe and Kamaranda sites.
Midnight Sun Mining (OTC:MDNGF) ha annunciato significative scoperte di mineralizzazione di rame presso il suo obiettivo Dumbwa. I primi risultati di trivellazione hanno rivelato intercetti degni di nota, tra cui 0,51% Cu su 39,7 metri (inclusi 1,13% Cu su 7 m) e 0,48% Cu su 25,9 metri.
Il programma di trivellazione, pensato per testare modelli geologici lungo l'obiettivo di circa 20 chilometri di estensione, ha confermato sistemi di rame solfuro mineralizzati in profondità. I fori chiave DBW-25-003 e DBW-25-007 hanno dimostrato mineralizzazione controllata da una zona di taglio, con solfuri di rame continui osservati su 150 m. I fori di follow-up DBW-25-009 e DBW-25-010 hanno confermato multipli assi di taglio paralleli con orientazione quasi verticale.
Il modello geologico indica multiple zone di taglio quasi verticali, parallele o sub-parallele, ancora aperte a est e a ovest. Il COO della società ha paragonato i risultati ai primi schemi di esplorazione ai siti Lubwe e Kamaranda di Lumwana.
Midnight Sun Mining (OTC:MDNGF) ha anunciado descubrimientos significativos de mineralización de cobre en su objetivo Dumbwa. Los resultados iniciales de perforación revelaron interceptos notables, entre ellos 0,51% de Cu en 39,7 metros (incluido 1,13% de Cu en 7 m) y 0,48% de Cu en 25,9 metros.
El programa de perforación, diseñado para probar modelos geológicos a lo largo de un objetivo de aproximadamente 20 kilómetros de longitud de strike, confirmó sistemas mineralizados de sulfuros de cobre en profundidad. Los agujeros clave DBW-25-003 y DBW-25-007 mostraron mineralización controlada por una zona de falla, con sulfuros de cobre continuos observados durante 150 m. Los agujeros de seguimiento DBW-25-009 y DBW-25-010 confirmaron múltiples zonas de falla paralelas con orientación casi vertical.
El modelo geológico indica múltiples zonas de falla casi verticales, paralelas o subparalelas, que quedan abiertas al este y al oeste. El director de operaciones de la empresa comparó los hallazgos con los primeros patrones de exploración en Lubwe y Kamaranda, de Lumwana.
Midnight Sun Mining (OTC:MDNGF)가 Dumbwa 타깃에서 상당한 구리 광맥 발견을 발표했습니다. 초기 시추 결과는 39.7m에서 0.51% Cu (그 중 7m에서 1.13% Cu를 포함)과 25.9m에서 0.48% Cu 등 주목할 만한 지표를 보여주었습니다.
약 20킬로미터의 스트라이크 길이를 가진 목표 전역의 지질 모델을 테스트하기 위해 설계된 시추 프로그램은 깊이에서 광석화된 황화 구리 시스템을 확인했습니다. 핵심 구멍 DBW-25-003 및 DBW-25-007은 절단대의 단면으로 제어된 광물화를 보여주었고, 150m에 걸쳐 구리 황화물이 연속적으로 관찰되었습니다. 추적 구멍 DBW-25-009 및 DBW-25-010은 거의 수직 방향의 평행 또는 준평행한 여러 절단대를 확인했습니다.
지질 모델은 동쪽과 서쪽으로 열려 있는 거의 수직에 가까운 다수의 절단대가 서로 평행 또는 준평행하다고 나타냅니다. 회사의 COO는 이러한 발견을 Lumwana의 Lubwe 및 Kamaranda 현장의 초기 탐사 패턴과 비교했습니다.
Midnight Sun Mining (OTC:MDNGF) a annoncé d’importantes découvertes de minéralisation cuivreuse sur sa cible Dumbwa. Les premiers résultats de forage ont révélé des interceptions notables, notamment 0,51% Cu sur 39,7 mètres (dont 1,13% Cu sur 7 m) et 0,48% Cu sur 25,9 mètres.
Le programme de forage, conçu pour tester des modèles géologiques le long d’une cible d’environ 20 kilomètres de longueur de strike, a confirmé des systèmes de cuivre sulfué minéralisés en profondeur. Les forages clés DBW-25-003 et DBW-25-007 ont démontré une minéralisation contrôlée par des zones de cisaillement, avec des sulfures de cuivre continus observés sur 150 m. Les forages de suivi DBW-25-009 et DBW-25-010 ont confirmé plusieurs zones de cisaillement parallèles à quasi verticales.
Le modèle géologique indique de multiples zones de cisaillement quasi verticales, parallèles ou quasi-parallèles, encore ouvertes à l’est et à l’ouest. Le directeur des opérations a comparé les résultats aux premiers schémas d’exploration sur les sites Lubwe et Kamaranda de Lumwana.
Midnight Sun Mining (OTC:MDNGF) hat bedeutende Kupfermineralisierungsentdeckungen bei seinem Dumbwa-Ziel bekannt gegeben. Erste Bohrergebnisse zeigten auffällige Abschnitte, darunter 0,51% Cu über 39,7 Meter (einschließlich 1,13% Cu über 7 m) und 0,48% Cu über 25,9 Meter.
Das Bohrprogramm, das darauf abzielt, geologische Modelle entlang des ca. 20 Kilometer langen Strike Ziels zu testen, bestätigte mineralisierte Sulfidkupfer-Systeme in der Tiefe. Schlüsselloch DBW-25-003 und DBW-25-007 demonstrierten durch Verwerfung gesteuerte Mineralisierung, mit kontinuierlichen Kupfer-Sulfiden über 150 m. Folgebohrungen DBW-25-009 und DBW-25-010 bestätigten mehrere parallele Verwerfungszonen mit nahezu vertikaler Orientierung.
Das geologische Modell deutet auf mehrere nahezu vertikale, parallel oder subparallel verlaufende Verwerfungszonen hin, die nach Osten und Westen offen bleiben. Der COO des Unternehmens verglich die Ergebnisse mit frühen Explorationsmustern an Lumwanas Lubwe- und Kamaranda-Stellen.
Midnight Sun Mining (OTC:MDNGF) أعلنت عن اكتشافات مهمة في توم Copper عند هدف Dumbwa. كشفت نتائج الحفر الأولية عن اعتراضات ملحوظة، بما في ذلك 0.51% Cu على 39.7 مترًا (ضمنها 1.13% Cu على 7 أمتار) و0.48% Cu على 25.9 مترًا.
برنامـج الحفر، المصمم لاختبار النماذج الجيولوجية على طول هدف بطول يقارب 20 كيلومترًا من طول المسار، أكد أنظمة من النحاس الكبريتي المعدنية في العمق. أظهر_holes DBW-25-003 و DBW-25-007 تعدينًا محكومًا بمنطقة القص، مع وجود كبريتيدات النحاس المستمرة عبر 150 م. أكدت حُفر المتابعة DBW-25-009 و DBW-25-010 وجود عدة مناطق قص موازية بزاوية تقارب العمودي تقريبا.
يشير النموذج الجيولوجي إلى وجود عدة مناطق قص شبه عمودية، موازية أو شبه موازية، ما تزال مفتوحة شرقا وغربا. قارن مدير التشغيل بالشركة النتائج بنماذج الاستكشاف المبكرة في مواقع Lubwe و Kamaranda في Lumwana.
Midnight Sun Mining (OTC:MDNGF)宣布在 Dumbwa 目标处发现了重要的铜矿化。初步钻探结果显示出显著的段落，包括0.51% Cu 覆盖 39.7 米（其中包括 7 米 1.13% Cu）以及 0.48% Cu 覆盖 25.9 米。
该钻探计划旨在测试跨越约20 公里走向的目标的地质模型，在深部确认了矿化的硫化铜系统。关键孔 DBW-25-003 和 DBW-25-007 显示了由错层带控制的矿化，观察到持续的铜硫化物覆盖达到 150 m。后续孔 DBW-25-009 和 DBW-25-010 确认了多条平行错层带，呈近垂直走向。
地质模型显示存在多条近垂直、彼此平行或准平行的错层带，东部和西部仍未完成探明。公司首席运营官将这些发现与Lumwana 的 Lubwe 和 Kamaranda 早期勘探模式进行了比较。
- Initial drilling confirmed significant copper mineralization with grades up to 1.13% Cu
- Discovery of continuous copper sulphides over 150m length
- Extensive ~20-kilometer strike-length target area remains open for exploration
- Multiple parallel mineralized shear zones identified, suggesting potential system expansion
- True widths of mineralization not yet determined
- Heart of the system not yet reached according to management
- Early-stage exploration with geological model still being refined
Initial Dumbwa intercepts include 39.7m of
Vancouver, British Columbia--(Newsfile Corp. - October 1, 2025) - Midnight Sun Mining Corp. (TSXV: MMA) (OTC Pink: MDNGF) ("Midnight Sun" or the "Company") is pleased to announce initial intercepts within the Dumbwa Target, which feature significant copper mineralization such as
Hole DBW-25-003 intercepted
Hole DBW-25-007, located 500m south of DBW-25-003, intercepted
Table1: Assay results based on four-acid digest, ICP-OES Finish. Intervals listed are based on drilling intervals and therefore are considered relative rather than true widths.
| Hole ID | From (m) | To (m) | Interval (m) | Cu (%) | |
| DBW-25-003 | 19.2 | 24.4 | 5.2 | 0.29 | |
| and | 56.5 | 82.4 | 25.9 | 0.48 | |
| DBW-25-007 | 4.0 | 20.0 | 16.0 | 0.31 | |
| and | 52.0 | 75.0 | 23.0 | 0.33 | |
| and | 100.3 | 140.0 | 39.7 | 0.51 | |
| including | 122.0 | 129.0 | 7.0 | 1.13 |
Midnight Sun's COO, Kevin Bonel, states, "We have successful initial intercepts confirming sulphide copper mineralization at Dumbwa, just a few holes into the first systematic drilling program ever conducted on this massive target. We do not believe we have reached the heart of the system yet, and as we advance along this immense strike extent, we expect to see areas of both broader mineralization and increased grade. We are continually fine-tuning our model, paving the way for rapid delineation of the overall Dumbwa system. From my personal experience at Lumwana, the initial phases of exploration drilling at Lubwe and Kamaranda followed a very similar pattern of the early holes hitting good mineralisation that further evolved the early model and allowed more precise drill targeting and proving of the large copper mineralized systems. Holes DBW-25-003 and DBW-25-007 have provided grades and thicknesses which are comparable to those encountered at Lumwana, reinforcing our analogue between the two, very early on in this process."
The mineralization intercepted in holes DBW-25-003 and DBW-25-007 occurs broadly within near vertical shear zones; copper sulphide mineral emplacement occurring within the shear zone, the overlying hanging wall rock, and immediate foot wall rock. Copper mineralization is predominantly comprised of bornite, chalcopyrite and chalcocite occurring in disseminated form; occasional-massive mineralization within quartz blow outs; coarse-grained sulphide clotting; and within healed fractures and veins.
Immediately following hole DBW-25-003 and discovery hole DBW-25-007, Midnight Sun completed holes DBW-25-009 and DBW-25-010 to ascertain the east-west lateral extent of the mineralization observed at the top of hole DBW-25-007 and to confirm the near vertical dip of the mineralized shear zones that were identified from oriented core. Hole DBW-25-009 was drilled 50m east and DBW-25-010 was drilled 120m west of the discovery hole DBW-25-007.
The two step-out holes confirmed the presence of multiple parallel shears zones and their near vertical orientation. In hole DBW-25-009, three distinct mineralized shear zones were intercepted, including a new parallel mineralized shear zone. In hole DBW-25-010, up dip confirmation of mineralization was observed over broad intervals. Additionally, new mineralized zones were also intercepted west of the original mineralized shear zones identified in the discovery hole DBW-25-007.
Assay results for outstanding holes including DBW-25-009 and DBW-25-010 have been rush ordered at SGS Labs in Kalulushi, Zambia while diamond drilling continues to follow the mineralization along strike northward.
The current interpretation of the geological model indicates multiple near-vertical, parallel to sub-parallel shear zones, which remain open to the east and west, as well as along the full ~20-kilometre strike length of the target area.
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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 until stable ground was achieved and then reduced to HQ size for the remainder of each hole. Sampling was based on visible copper mineralization and sample intervals honoured any important lithological boundaries. Core was then cut in house using a diamond saw and the right half of core was 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 four-acid digest with ICP-OES finish (SGS Code ICP42S). Copper range of detection is 0.01
Location of Reported Drill Holes
| Hole ID | XCOORD | YCOORD | AZIMUTH | DIP | EOH (m) |
| DBW-25-003 | 440515 | 8627810 | 90 | -60 | 166.5 |
| DBW-25-007 | 440400 | 8627310 | 270 | -60 | 210.0 |
- WGS84 UTM35S
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. Further to this, geological similarities or characteristics are not guarantees or certainties of successful exploration. 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.
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FAQ
What copper grades did Midnight Sun Mining (MDNGF) report from its Dumbwa drilling program?
How extensive is the Dumbwa Target mineralization system?
What type of mineralization was found in the Dumbwa drilling program?
How does the Dumbwa discovery compare to other copper deposits in the region?
What are the next steps for Midnight Sun's Dumbwa exploration program?
