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Bonterra Announces Additional Assay Results from Moss Target and Restart of Drilling by Gold Fields at Phoenix JV

Drill Results Partnerships & JV

Bonterra Announces Additional Assay Results

from Moss Target and Restart of Drilling by

Gold Fields at Phoenix JV

Val-d'Or, Quebec--(Newsfile Corp. - December 11, 2024) -

Bonterra Resources Inc. (TSXV: BTR)

(OTCQX: BONXF) (FSE: 9BR2)

("

Bonterra

" or the "

Company

") is pleased to announce additional

assay results from the Moss target and the restart of drilling by a 100% indirect subsidiary of Gold Fields

Ltd ("

Gold Fields

" or the "

Operator

") at the Phoenix JV (formerly known as the Urban-Barry Property)

(the "

Project

"). The Project is under a definitive earn-in and joint venture agreement (the "

JV

Agreement

") with Osisko Mining Inc., which is now Gold Fields. Under the JV Agreement, Gold Fields

has the right to acquire up to a 70% interest in the Project by spending C$30 million in work

expenditures, with a minimum spending commitment of C$10 million per year over a three-year period

(see press release dated November 28, 2023, for more details).

Marc-André Pelletier, President and CEO commented: "The start of exploration activities under Gold

Fields as the new operator marks an exciting milestone for the Phoenix JV. Gold Fields' 2025 program

is focused on advancing the understanding of the regional geology and identifying new exploration

targets across the property.

Recent drilling results at the Moss target, where Lynx-style gold mineralization has been identified,

highlights the strong potential for further discoveries. We are eager to collaborate with Gold Fields to

advance Quebec's newest emerging gold camp."

Additional Assay Results from the Moss Target

To date, over 60,000 meters ("

m

") have been drilled, and approximately C$16 million has been spent on

the Project this year by Osisko under the JV Agreement. The extensive drilling program at Moss target

has led to high-grade mineralization discovery similar to the Windfall-Lynx Zone. The extension at depth

is confirmed by drill holes OSK-PHX-24-078 and OSK-PHX-24-096 returning 38.33 g/t Au over 1.1 m

(including 69.6 g/t Au over 0.6 m) and 7.37 g/t Au over 4.2 m (including 28.6 g/t Au over 0.4 m),

respectively (see press release dated August 6, 2024). The majority of the assay results have now been

processed, with key results displayed on a longitudinal section in Figure 2. Significant intercepts not

previously reported are shown below.

Highlights at the Moss Target:

6.23 g/t Au over 2.8m, including 18.1 Au g/t over 0.9m in hole OSK-PHX-24-112

12.3 g/t Au over 0.5m and 3.97 g/t Au over 3.4 m in hole OSK-PHX-24-073

7.50 g/t Au over 0.9 m, including 20.9 g/t Au over 0.3 m in hole OSK-PHX-24-106

5.05 g/t Au over 1.0 m in hole OSK-PHX-24-053

Start of Drilling by Gold Fields at the Phoenix JV

Gold Fields is in the draft planning stage for a potential 20,000 meters drill program. Final targets remain

subject to internal review and prioritization. Possible geophysical surveys are also at draft planning

stage. The Operator has identified several prospective targets based on historical data including, gold

showings, drill results, and geophysical surveys (see Figure 1 - Plan View of Target Areas on the

Phoenix JV).

Gold Fields plans to mobilize utilizing three to four drill rigs during the latest drilling campaign, primarily

along the Barry Shear Zone where the Gladiator SW and NE/Titan targets are located. Those targets are

next to the Gladiator deposit, which contains 0.4 million ounces of Measured and Indicated Mineral

resources and 1.0 million ounces of Inferred Mineral resources, as stated in the 2021 mineral resource

estimate ("

2021 MRE

").

In addition, a detailed review of the core samples from both Barry and Gladiator

deposits is also planned. Other areas will be targeted such as Duke NE, Chanceux, Tourmaline Ridge

extension and Rouleau Till as part of the program. Two drill rigs are currently turning on the Gladiator SW

target, with over 3,000 m drilled to date.

Figure 1- Phoenix JV Project - Surface Plan View with Completed Drill holes and 2025 Drill

Target Areas

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/1528/233175_63351017343dd846_001full.jpg

Figure 2- Longitudinal View of the Moss Target with Best Results - Looking North

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/1528/233175_63351017343dd846_002full.jpg

UTM Coordinates, System: NAD83 Zone 18N

Table 1: Drill Hole Locations - Phoenix JV, Moss Target

Hole ID

Easting

Northing

Elevation (m)

Azimuth

(°)

Dip

(°)

Length (m)

OSK-PHX-24-053

447888

5431497

407

315

-46.38

405

OSK-PHX-24-073

448787

5431493

399

323

-50.28

942

OSK-PHX-24-106

447292

5430784

395

337

-54.8

582

OSK-PHX-24-112

447021

5430717

395

350

-47.87

501

UTM Coordinates, System: NAD83 Zone 18N

Table 2: Significant Mineralized Intersections from Drilling on the Moss Target

Hole ID

Including

From (m)

To (m)

Length (m)

Grade (Au g/t)

Metal Factor

(length x grade)

OSK-PHX-24-053

89.0

90.0

1.0

5.05

5.05

OSK-PHX-24-073

554.6

558.0

3.4

3.97

13.5

and

700.4

700.9

0.5

12.3

6.15

OSK-PHX-24-106

453.0

453.9

0.9

7.50

6.75

Including

453.6

453.9

0.3

20.9

6.27

OSK-PHX-24-112

210.1

212.9

2.8

6.23

17.4

Including

210.1

211.0

0.9

18.1

16.3

1)

True width determination is currently unknown but is estimated from 55 to 80% of the reported core

length interval for the zone.

2)

Assays are uncut except where indicated.

3)

Intercepts have not been correlated to individual zones or vein domains at this time.

Quality Control and Reporting Protocols (adopted by Osisko Mining Inc.)

NQ core assays were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-

assaying-AA finish or gravimetric finish at ALS Laboratories in Val-d'Or, Québec, or Vancouver, British

Colombia. The 1-kilogram screen assay method is selected by the geologist when samples contain

coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also

analyzed for multi-elements, including silver, using Four Acid Digestion-ICP-MS method at ALS

Laboratories. Drill program design, Quality Assurance/Quality Control ("

QA/QC

") and interpretation of

results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and

industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes

by Osisko Mining as well as the lab.

Qualified Person

M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, has reviewed and approved

the technical 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

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 completed the acquisition of Osisko Mining for C$2.16

billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest

in the joint venture by incurring C$30 million in work expenditures until November 2026 (including

expenditures incurred by Osisko Mining prior to October 2024). 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

[email protected]

2872 Sullivan Road, Suite 2, Val d'Or, Quebec 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 news release contains forward-looking statements and forward-looking information within the

meaning of applicable securities laws. All statements other than statements of historical fact may be

forward-looking statements or information. Forward-looking statements are frequently identified by such

words as "may", "will", "plan", "expect", "anticipate", "estimate", "intend" and similar words referring to

future events and results. The forward-looking statements and information are based on certain key

expectations and assumptions made by management of the Company. Although management of the

Company believes that the expectations and assumptions on which such forward-looking statements

and information are based are reasonable, undue reliance should not be placed on the forward-looking

statements and information since no assurance can be given that they will prove to be correct.

Forward-looking statements and information are provided for the purpose of providing information about

the current expectations and plans of management of the Company relating to the future. Readers are

cautioned that reliance on such statements and information may not be appropriate for other purposes,

such as making investment decisions. Actual results could differ materially from those currently

anticipated due to a number of factors and risks, including the ability and timing of the parties to

complete the Joint Venture (if at all), whether the work expenditures would be incurred as contemplated

in the Agreement (or at all), the speculative nature of mineral exploration and development, fluctuating

commodity prices, competitive risks and the availability of financing, as described in more detail in the

Company's recent securities filings available at www.sedarplus.ca. Accordingly, readers should not

place undue reliance on the forward-looking statements and information contained in this news release.

Readers are cautioned that the foregoing list of factors is not exhaustive. The forward-looking statements

and information contained in this news release are made as of the date hereof and no undertaking is

given to update publicly or revise any forward-looking statements or information, whether as a result of

new information, future events or otherwise, unless so required by applicable securities laws. The

forward-looking statements or information contained in this news release are expressly qualified by this

cautionary statement.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/233175