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Bonterra Completes an Airborne Gravity Survey and Initiates a Ground Geophysical IP Survey at its Desmaraisville Properties

Press Release

Val-d’Or, QC – December 14, 2023 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce the completion of a highresolution helicopter-borne gravity survey and the commencement of a ground induced polarization (“IP”) survey at its Desmaraisville North and South Properties (the “Properties”). These comprehensive gravity and IP surveys are expected to assist the Company in its 2024 exploration program by generating exploration targets.

Bonterra contracted Sander Geophysics Ltd (“SGL”) based in Ottawa, Ontario to conduct a high-resolution helicopter-borne gravity survey on its Properties (Figure 1). The survey consisted of a total of 1,583 line-kilometers (“km”) at 200 meters (“m”) flight-line spacing and flown at a 60 m elevation over the entirety of the Properties. The purpose of the survey is to identify potential target areas of gold enrichment in enhanced basement alteration associated with large structural corridors and as well to identify potential targets for base metals (Zn, Pb and Ag) and strategic metals (Ni and Cu) associated with volcanic and ultramafic geological environments. The survey was completed in November and preliminary data has already been received. The final report and interpretations are expected by year end.

Bonterra has also contracted Abitibi Geophysics Inc. (“AG”) of Val-d’Or, Quebec to carry out an 85 line-km OreVision® 2D IP survey at its Desmaraisville South Property (Figure 2). The survey consists of a total of 80 line-km with a configuration of a = 37.5 m and n = 1 to 20 for a depth of investigation of 300 m. The surveyed area covers the Opawica-Guercheville corridor of deformation where numerous gold showings have been previously discovered and historical gold mineral resources have been estimated. The survey is expected to be completed by year end and will be used in combination with the gravity survey to identify and explore disseminated and massive sulfide mineralized zones in the Company’s as part of the Company’s 2024 exploration program.

In early December, Bonterra mobilized one drill rig south of the old Coniagas Mine to drill test the deep southwest plunge of a zinc, lead, and silver mineralized orebody (Table 1). InnovExplo of Val-d’Or, Quebec was contracted to compile and generate this exploration drill target. After the completion of the 900 m deep hole, Bonterra intends to contract AG to complete an InfiniTEM® XL BHEM survey with a patented loop configuration with depth potential up to 1,000 m. Historical production at Coniagas was over 700,000 tonnes at 10.8% Zn, 1% Pb and 183 g/t Ag.

Marc-André Pelletier, President and CEO commented: “Bonterra has redirected its exploration efforts to the 100%-owned Desmaraisville property located near the Bachelor Mill Complex after entering into an earn-in and joint venture agreement with Osisko Mining Inc. on the Urban-Barry property. The abovementioned geophysics surveys, combined with the 15,000 m drilling program currently underway, will be used to identify a fresh set of exploration targets for future drilling campaigns. We believe that the Desmaraisville property has very good potential for new discoveries in both gold and base metals, particularly around the O’Brien intrusive – host of the Bachelor-Moroy deposits and the newly discovered Desmaraisville South lens, and along the Opawica-Guercheville corridor. This regional deformation corridor, which crosses Bonterra’s property for more than 20 km, is conducive to discoveries and has had very little exploration activity in the past.”

Figure 1 — Map of SGL Gravity Survey

Figure 2 — Map of AG IP and Resistivity Survey

Table 1: Drill Hole Location — Desmaraisville South Project, Quebec, Coniagas Deep Target

Qualified Person

M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, oversees all exploration activities on the Desmaraisville Properties and has compiled and approved the information contained in this press release.
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 a earn-in and joint venture agreement with Osisko Mining Inc. for the Urban-Barry properties, which include the Gladiator and Barry deposits. Over the next three years, Osisko can earn a 70% interest by incurring $30 million in work expenditures. This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Quebec J9P 0B9
819-279-9304 | Website: www.btrgold.com

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