Bonterra Discovers Hewfran Zone Extension Adjacent to Bachelor Mine Workings, Highlighting Restart Potential
Bonterra Resources (OTCQX: BONXF) announced discovery of an extension to the Hewfran Zone at the 100%‑owned Desmaraisville South Project, adjacent to historical Bachelor Mine workings and within 500 m of the Bachelor Mill Complex.
Key facts: drill highlights include 2.78 g/t Au over 4.7 m (BRDS‑25‑076), 2.54 g/t Au over 8.0 m (BRDS‑25‑077) and 1.32 g/t Au over 17.0 m (BRDS‑25‑092). To date, 22 holes (5,658 m) completed in a 10,000–12,000 m 2025 program; 1,148 assays pending. Historic Bachelor production exceeded 350,000 oz at 5.0 g/t Au, supporting a potential low‑cost restart using existing infrastructure.
Bonterra Resources (OTCQX: BONXF) ha annunciato la scoperta di un'estensione della Hewfran Zone nel Progetto Desmaraisville South, al 100% di proprietà, adiacente alle vecchie attività della Mina Bachelor e a meno di 500 m dal Bachelor Mill Complex.
Fatti chiave: i punti salienti delle perforazioni includono 2,78 g/t Au su 4,7 m (BRDS‑25‑076), 2,54 g/t Au su 8,0 m (BRDS‑25‑077) e 1,32 g/t Au su 17,0 m (BRDS‑25‑092). Ad oggi, 22 fori (5.658 m) completati in un programma 2025 di 10.000–12.000 m; 1.148 analisi in attesa. La produzione storica di Bachelor ha superato 350.000 oz a 5,0 g/t Au, supportando un potenziale rilancio a basso costo utilizzando l'infrastruttura esistente.
Bonterra Resources (OTCQX: BONXF) anunció el descubrimiento de una extensión de la Hewfran Zone en el Desmaraisville South Project, 100% propiedad, adyacente a las operaciones históricas de la Mina Bachelor y a menos de 500 m del Bachelor Mill Complex.
Datos clave: los aspectos destacados de perforación incluyen 2,78 g/t Au sobre 4,7 m (BRDS‑25‑076), 2,54 g/t Au sobre 8,0 m (BRDS‑25‑077) y 1,32 g/t Au sobre 17,0 m (BRDS‑25‑092). Hasta la fecha, se han completado 22 agujeros (5.658 m) en un programa de 2025 de 10.000–12.000 m; 1.148 análisis pendientes. La producción histórica de Bachelor superó 350.000 oz a 5,0 g/t Au, respaldando un potencial reinicio de bajo costo utilizando la infraestructura existente.
Bonterra Resources (OTCQX: BONXF)가 Desmaraisville South 프로젝트의 Hewfran Zone 확장을 발견했다고 발표했습니다. 이 프로젝트는 100% 소유이며, 과거 Bachelor 광산의 인접 위치 및 Bachelor Mill Complex에서 500 m 이내에 있습니다.
주요 사실: 시추 하이라이트로는 2.78 g/t Au over 4.7 m (BRDS‑25‑076), 2.54 g/t Au over 8.0 m (BRDS‑25‑077) 및 1.32 g/t Au over 17.0 m (BRDS‑25‑092)이 포함됩니다. 지금까지 2025년 프로그램에서 10,000–12,000 m 규모의 계획 중 22개 구멍(5,658 m)이 완료되었으며; 1,148개 분석 결과는 대기 중입니다. 역사적 Bachelor 생산은 350,000 oz를 초과했고 5.0 g/t Au로서 기존 인프라를 활용한 저비용 재가동 가능성을 뒷받침합니다.
Bonterra Resources (OTCQX: BONXF) a annoncé la découverte d'une extension de la Hewfran Zone dans le Desmaraisville South Project, détenu à 100 %, adjacent aux anciennes opérations de la Mine Bachelor et à 500 m du Bachelor Mill Complex.
Points clés : les points marquants de forage comprennent 2,78 g/t Au sur 4,7 m (BRDS‑25‑076), 2,54 g/t Au sur 8,0 m (BRDS‑25‑077) et 1,32 g/t Au sur 17,0 m (BRDS‑25‑092). À ce jour, 22 forages (5 658 m) réalisés dans un programme 2025 de 10 000–12 000 m; 1 148 analyses en attente. La production historique de Bachelor a dépassé 350 000 oz à 5,0 g/t Au, soutenant un redémarrage potentiel à faible coût en utilisant l'infrastructure existante.
Bonterra Resources (OTCQX: BONXF) meldete die Entdeckung einer Erweiterung der Hewfran Zone im Desmaraisville South Project, das zu 100 % im Besitz ist, angrenzend an historische Bachelor-Minenarbeiten und innerhalb von 500 m des Bachelor Mill Complex.
Wichtige Fakten: Bohrhöhepunkte umfassen 2,78 g/tAu über 4,7 m (BRDS‑25‑076), 2,54 g/tAu über 8,0 m (BRDS‑25‑077) und 1,32 g/tAu über 17,0 m (BRDS‑25‑092). Bis heute wurden 22 Bohrlöcher (5.658 m) in einem 2025er Programm von 10.000–12.000 m abgeschlossen; 1.148 Analysen ausstehend. Historische Bachelor-Produktion übertraf 350.000 oz bei 5,0 g/t Au, was eine potenzielle kostengünstige Wiederaufnahme unter Nutzung vorhandener Infrastruktur unterstützt.
Bonterra Resources (OTCQX: BONXF) أعلنت عن اكتشاف امتداد لمنطقة Hewfran Zone ضمن مشروع Desmaraisville South المملوك بنسية 100%، بجوار عمليات مناجم Bachelor التاريخية وعلى مسافة تقل عن 500 م من مجمع Bachelor Mill.
حقائق رئيسية: تشمل أبرز نتائج الحفر 2.78 g/t Au على 4.7 م (BRDS‑25‑076)، 2.54 g/t Au على 8.0 م (BRDS‑25‑077) و1.32 g/t Au على 17.0 م (BRDS‑25‑092). حتى الآن، تم الانتهاء من 22 بئراً (5,658 م) ضمن برنامج 2025 الذي يتراوح بين 10,000 و12,000 م؛ 1,148 تحليل قيد الانتظار. الإنتاج التاريخي لـ Bachelor تجاوز 350,000 أونصة عند 5.0 g/t Au، ما يدعم إمكانية إعادة تشغيل بتكلفة منخفضة باستخدام البنية التحتية الموجودة.
Bonterra Resources (OTCQX: BONXF)宣布在完全自有的 Desmaraisville South 项目中发现 Hewfran Zone 的延伸，邻近历史上的 Bachelor 矿区作业，距离 Bachelor Mill Complex 500 m。
要点：钻探亮点包括 2.78 g/t Au 通过 4.7 m (BRDS‑25‑076)、2.54 g/t Au 通过 8.0 m (BRDS‑25‑077) 和 1.32 g/t Au 通过 17.0 m (BRDS‑25‑092)。迄今为止，在 2025 年计划的 1 万至 1.2 万米中，已完成 22 根钻孔（5,658 m）；1,148 份分析待出。Bachelor 的历史产量超过 350,000 oz，品位为 5.0 g/t Au，这支持在现有基础设施下以较低成本进行潜在重新启动。
- Drill intercept 2.78 g/t Au over 4.7 m (BRDS-25-076)
- Drill intercept 2.54 g/t Au over 8.0 m (BRDS-25-077)
- Hewfran within 500 m of Bachelor Mill and infrastructure
- Historic Bachelor production >350,000 oz at 5.0 g/t Au
- 1,148 assay results remain pending
- Reported intervals are drilled lengths; true widths unknown
- Only one drill rig active; program ongoing to year-end
Val-d'Or, Quebec--(Newsfile Corp. - October 16, 2025) - Bonterra Resources Inc. (TSXV: BTR) (OTCQX: BONXF) (FSE: 9BR2) ("Bonterra" or the "Company") is pleased to announce the discovery of the extension of the mineralized Hewfran Zone at its
The Hewfran Zone lies within the active Bachelor mining lease and less than 500 meters ("m") from the Bachelor Mill Complex, offering a strategic opportunity to advance Bonterra's plan to restart mining operations using existing permitted infrastructure.
Marc-André Pelletier, President and CEO commented: "The Hewfran Zone extension confirms the strong potential that remains immediately adjacent to the previously mined Bachelor Mine workings. Located within the existing mining lease and only a short distance from the mill and underground development, Hewfran presents a compelling opportunity to support a restart scenario. Importantly, the mineralization style and host rocks are consistent with those at Bachelor Mine. With roughly half of the 2025 drill program completed, we are now focusing on Hewfran and other high-priority targets identified through VRIFY's DORA platform, as the Bachelor Mine and Desmaraisville property continue to demonstrate significant untapped potential."
Hewfran Zone Highlights
Five shallow holes were completed to evaluate the up-dip and near-surface extensions of the Hewfran Zone Vein B. Drill holes BRDS-25-076, 077, and 092 intersected zones of intense silicification and hematite alteration with disseminated pyrite, confirming that the mineralized structures remain continuous toward surface. Bonterra plans to follow up on these results as part of its ongoing effort to restart operations at the Bachelor Mine. Drill highlights from the Hewfran Zone extension are as follows:
2.78 g/t Au over 4.7 m, including 14.2 g/t Au over 0.7 m in hole BRDS-25-076
2.54 g/t Au over 8.0 m, including 6.19 g/t Au over 1.2 m in hole BRDS-25-077
1.32 g/t Au over 17.0 m, including 3.88 g/t Au over 4.0 m in hole BRDS-25-092
The Hewfran Zone consists of two mineralized lenses (A and B) extending from surface down to approximately 200 m below surface, positioned immediately alongside historical stopes, and underground development at the former Bachelor Mine. The mineralization style and host rock characteristics are consistent with those observed at Bachelor, comprising steeply dipping quartz-carbonate veining, silica flooding, hematite-altered stockwork, and pyrite.
Importantly, the Hewfran Zone lies within 500 m of the Bachelor Mill and surface infrastructure highlighting a low-cost, near-mine growth opportunity with direct access to existing shaft, declines, and mine services (see Figures 1 and 2 and Tables 1 and 2).
Figure 1: Desmaraisville South Project - Longitudinal View showing Hewfran A & B Veins and the Bachelor Mine Workings
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Figure 2: Desmaraisville South Project - Hewfran Plan View - B Vein New Assay Results
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2025 Drilling Update
Diamond drilling at Desmaraisville South began in early July 2025, with one drill rig currently active on site. To date, 22 diamond drill holes totaling 5,658 m have been completed. A total of 32,911 NQ core samples, along with 514 associated QA/QC samples, have been submitted to accredited laboratories, with 1,148 assay results pending. Fieldwork, including detailed mapping and sampling, continues across the property.
The ongoing 10,000-12,000 m drill campaign, scheduled for completion by year-end, was initially designed to follow up on previous drilling at the Hewfran, Mistik 13, and Le Sueur targets, as well as to test additional targets generated using VRIFY's AI-assisted discovery platform, DORA. Following the encouraging intercepts at Hewfran, the remainder of the program will now prioritize step-out and delineation drilling in that area, and other high-priority targets near the Bachelor Mill Complex.
All targets are located in close proximity to the Bachelor Mill Complex, where historical production exceeded 350,000 ounces of gold from two million tonnes of ore at an average grade of 5.0 g/t Au.
Mistik 13 and Le Sueur
At Mistik 13, new drilling tested the western and northern extensions of the gold intercept reported in hole BRDS-23-013 (0.80 g/t Au over 11.7 m, including 2.84 g/t Au over 1.4 m; see press release dated February 5, 2024). Drill holes BRDS-25-081 and BRDS-25-082 intersected a mineralized shear zone characterized by abundant silica alteration with lesser sericite and carbonate and disseminated pyrite. The gold mineralization appears to be associated with a northwest-southeast trending geological structure adjacent to a felsic dike (see Figure 3).
At Le Sueur, visible gold ("VG") was intercepted in hole BDRS-25-085 at proximity of an historical showing discovered in 1990 by SEREM (10.97 g/t Au over 1.5 m). Drill highlights from Mistik 13 and Le Sueur are as follows:
0.24 g/t Au over 21.5 m in hole BRDS-25-081(Mistik 13)
3.05 g/t Au over 4.61 m, including 23.3 g/t Au over 0.5 m in hole BRDS-25-082 (Mistik 13)
1.17 g/t Au over 0.45 m with visible gold in hole BRDS-25-085 (Le Sueur)
Figure 3: Desmaraisville South Project - Mistik 13 and Le Sueur Plan View New Assay Results
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2025 Field Work Campaign
The 2025 mapping and sampling program at Desmaraisville South commenced on August 11th with a two-person field crew. This work builds on the property-wide mapping and sampling program initiated in 2024. To date, a total of 66 grab samples and 46 lithogeochemistry samples have been collected and submitted for analysis at AGAT Laboratories in Val-d'Or, QC and Thunder Bay, ON.
Table 1: Drill Hole Locations - Desmaraisville South project, Québec
| Hole ID | Easting | Northing | Elevation (m) | Azimuth | Dip | Length (m) |
| BRDS-25-76 | 416515 | 5483404 | 307.3 | 30 | -50 | 330 |
| BRDS-25-77 | 416689 | 548331.8 | 318.0 | 19 | -51 | 153 |
| BRDS-25-81 | 418307 | 5485899 | 311.0 | 189 | -50 | 282 |
| BRDS-25-82 | 418217 | 5485944 | 302.0 | 189 | -50 | 303 |
| BRDS-25-092 | 416515 | 5483404 | 307.0 | 65 | -55 | 201 |
| BRDS-25-085 | 417454 | 5486573 | 314.0 | 205 | -50 | 201 |
| UTM Coordinates, System: NAD83 Zone 18 | ||||||
Table 2: Significant Mineralized Intersections from Drilling on the Desmaraisville South project
| Hole ID | Zones | From (m) | To (m) | Length (m) | Grades (g/t Au) | Metal Factor (Length x Grade) |
| BRDS-25-76 | Hewfran B | 82.0 | 86.7 | 4.7 | 2.78 | 13.1 |
| Including | 85.3 | 86.0 | 0.7 | 14.20 | 9.9 | |
| BRDS-25-77 | Hewfran B | 114.3 | 122.3 | 8.0 | 2.54 | 20.3 |
| Including | 115.8 | 117.0 | 1.2 | 6.19 | 7.4 | |
| BRDS-25-81 | Mistik 13 | 101.0 | 122.5 | 21.5 | 0.24 | 5.1 |
| BRDS-25-82 | Misitk 13 | 129.0 | 133.61 | 4.61 | 3.05 | 14.1 |
| Including | 130.0 | 130.5 | 0.5 | 23.3 | 11.7 | |
| BRDS-25-092 | Hewfran B | 146.0 | 163.0 | 17.0 | 1.32 | 22.5 |
| including | 157.0 | 161.0 | 4.0 | 3.88 | 15.5 | |
| BRDS-25-085* | Le Sueur | 167,5 | 168,0 | 0.5 | 1.17 | 0.6 |
| 1) Reported intervals represent drilled core lengths; true widths are not yet known. 2) Gold results obtained above<0.5 g/t Au with a Metal Factor above 5 except for Le Sueur drill hole where VG was intercepted. 3) * Visible Gold (VG) | ||||||
Quality Control and Reporting Protocols
The Desmaraisville South Project's drill core gold analyses were performed at the MSALABS and the AGAT Laboratories located in Val-d'Or, Québec. These external laboratories employ a rigorous QA-QC analysis program that meets industry standards. At the AGAT laboratory, the analyses are carried out by fire assay (A.A.) with atomic absorption finish and with gravimetric finish for assay above 10 g/t Au. Blanks, duplicates, and certified reference standards are inserted into the sample stream to monitor the Laboratory's performance. Other core samples gold analysis was performed at MSALABS of Val d'Or, Québec. The samples were crushed to a particle size of
The Company's QA-QC program requires that at least 5 to
Qualified Person
M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, oversees all exploration activities on the Desmaraisville Property and has compiled and approved the information contained in this press release. Mr. Trudel is a qualified person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.
About Bonterra Resources Inc.
Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Quebec, Canada. The Company's assets include the Gladiator, Barry, Moroy, and Bachelor gold deposits, which collectively hold 1.24 million ounces in Measured and Indicated categories and 1.78 million ounces in the Inferred category.
In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. for the Urban-Barry properties (the "JV Agreement"), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C
FOR ADDITIONAL INFORMATION
Marc-André Pelletier, President & CEO
ir@btrgold.com
2872 Sullivan Road, Suite 2, Val d'Or, Québec J9P 0B9
819-825-8678 | Website: www.btrgold.com
Neither 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 release.
Caution regarding forward-looking statements
This press release contains "forward-looking information" within the meaning of applicable securities laws, including statements regarding the interpretation of the newly identified Hewfran Zone and its proximity to the Bachelor Mine underground workings, the potential for additional mineral resources within the Bachelor Camp, and the possible restart of mining operations at the Bachelor Mill Complex. Forward-looking information also includes references to the earn-in and joint venture agreement with Osisko Mining announced on November 28, 2023, and the acquisition of Osisko Mining by Gold Fields announced on August 12, 2024. Such statements are based on Bonterra's current expectations and are subject to known and unknown risks and uncertainties that may cause actual results to differ materially, including those related to exploration results, interpretations, permitting, financing, commodity prices, and operational challenges. Exploration results, particularly from wide-spaced drilling, may not be indicative of a mineral deposit, and there has been insufficient exploration to define a mineral resource. It is uncertain whether further work will lead to the delineation of a mineral resource or a restart of mining operations at Bachelor. Bonterra undertakes no obligation to update any forward-looking information except as required by applicable securities laws. The words "will," "anticipated," "plans," "potential," "could," "should," and other similar expressions are intended to identify forward-looking information. Such statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially from those expressed or implied. Readers are cautioned not to place undue reliance on forward-looking information. Bonterra undertakes no obligation to update any forward-looking information except as required by applicable securities laws.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/270635
FAQ
What did Bonterra (BONXF) announce on October 16, 2025 about the Hewfran Zone?
Which Bonterra drill holes contained the strongest Hewfran results in 2025?
How much drilling has Bonterra completed at Desmaraisville South in 2025?
Does the Hewfran discovery affect Bonterra's plan to restart the Bachelor Mine (BONXF)?
Are all assay results from Bonterra's 2025 drilling available for BONXF investors?
What caveats did Bonterra disclose about the 2025 drill intervals (BONXF)?
