Depth Extension Defined at Barry Deposit
Depth Extension Defined at Barry Deposit
Val-d'Or, Quebec--(Newsfile Corp. - June 4, 2026) -
Bonterra Resources Inc. (TSXV: BTR) (OTCQX:
BONXF) (FSE: 9BR2)
("
Bonterra
" or the "
Company
") is pleased to announce the expansion of the
Barry deposit at depth, as a result of deep drilling conducted at the Barry property (the "
Project
"). The
Project is under a definitive earn-in and joint venture agreement (the "
JV Agreement
") with Gold Fields
Limited ("
Gold Fields
"). Under the JV Agreement, Gold Fields has the right to acquire 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).
Cesar Gonzalez, Executive Chairman and Interim CEO, commented: "The discovery of mineralization
extending at depth at the Barry deposit is a significant development, underscoring the potential to
substantially increase gold ounces beyond the current mineral resources. The results released today
were drilled approximately 100 meters from the boundary of the mineral resource estimate published last
February. Notably, all five drill holes intersected potential mineralization consistent with Zone H at the
Barry deposit. We congratulate our partner, Gold Fields, on this discovery and look forward to the
continued advancement of exploration work on the Barry property."
Highlights Barry Deep Drill Results
7.59 g/t Au over 1.9 m, including 17.75 g/t Au over 0.6 m, in hole BAR-26-0617
4.60 g/t Au over 2.5 m, including 11.1 g/t Au over 0.5 m, in hole BAR-26-0617
4.15 g/t Au over 0.4 m in hole BAR-26-0615
2.63 g/t Au over 1.6 m, including 7.52 g/t over 0.4 m, in hole BAR-26-0615
3.42 g/t Au over 2.1 m, including 5.77 g/t Au over 0.8 m, in hole BAR-26-0616
5.75 g/t Au over 1.2 m, including 13.4 g/t Au over 0.4 m, in hole BAR-26-0616
4.68 g/t Au over 0.4 m in hole BAR-26-0619
6.48 g/t Au over 2.2 m including 17.15 g/t Au over 0.5 m in hole BAR-26-0619
2026 Exploration Program Updates
The 2026 exploration program was designed to test targets located south-west and east of the Barry
deposit and included deep drilling to evaluate the down-plunge extension of mineralization at depths of
approximately 750 to 850 meters, as well as the eastern down-plunge extension of the deposit. Diamond
drilling at Barry began in January with two drill rigs and was completed in April. A total of 14 diamond drill
holes totaling 8,346 m has been completed. A total of 9,465 NQ core samples has been submitted to
accredited laboratories, with about 30% of assay results pending.
The ground gravimetry survey that started last year is now complete. The survey was focused on
improving a 200X200 m grid south of the Windfall Project and completing a 100X100 m survey around
the Gladiator deposit.
Figure 1: Surface Plan View with 2026 Completed Drill Holes at Barry
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/1528/300015_2d867741549e6a7b_001full.jpg
Figure 2: Long Section View with Barry Deep Holes Drill Results
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/1528/300015_2d867741549e6a7b_002full.jpg
Barry Project Highlights
The Barry deposit is characterized by three dominant sets of structures, all dipping to the southeast.
The
sub-vertical shear zones and the H-Series shear zones dipping 25 to 40 degrees are hosted within
intermediate to mafic volcanics and tuffs with local felsic intrusions. Contact zones dip at 50 to 65
degrees along the lower and upper contacts of the D1, D2 and D3 felsic intrusions with mafic volcanics.
Gold mineralization is associated with disseminated sulfides within shear zones and veins with local
visible gold. The Barry deposit has been delineated over 1.4 kilometers along strike and 700 m vertically
and remains open for further expansion.
The latest Mineral Resource Estimate (the "
2026 MRE
", press release dated February 23, 2026)
contains an Open pit mineral resources 7.8 million tonnes ("
Mt
") at an average grade of 1.67 g/t Au for
417 thousand ounces ("
Koz
") of Measured & Indicated Mineral Resources, plus 125 thousand tonnes
("
Kt
") at 2.32 g/t Au for 9 Koz of Inferred Mineral Resources. Underground Mineral Resources contains
4.1 Mt at an average grade of 3.47 g/t Au for 457 Koz of Measured & Indicated Mineral Resources, plus
8.8 Mt at 3.41 g/t Au for 972 Koz of Inferred Mineral Resources (see press release dated February 23,
2026).
The Barry Mine was in production between 2008 and 2010, during which time it produced approximately
44,000 ounces of gold. In 2018, Bonterra constructed an underground exploration ramp extending to 100
m below surface. The Company currently maintains a mining lease for 1.2 million tonnes, permitting
extraction by both open pit and underground methods. The project is supported by established
infrastructure and essential permits required to facilitate a restart of operations.
Table 1: Drill Hole Locations -Barry Deep Target
Hole ID
Easting
Northing
Elevation (m)
Azimuth
(°)
Dip
(°)
Length (m)
BAR-26-0615
444424
5425623
394
329
-60
1,002
BAR-26-0616
444417
5425373
392
330
-60
1,179
BAR-26-0617
444640
5425661
393
329
-59
1,143
BAR-26-0618
444186
5425344
393
331
-58
1,050
BAR-26-0619
444650
5425896
392
332
-60
999
UTM Coordinates, System: NAD83 Zone 18N
Table 2: Significant Mineralized Intersections from Drilling on the Barry Deep Target
Hole ID
Including
From (m)
To (m)
Length (m)
Grade (Au g/t)
Metal Factor
(length x grade)
BAR-26-0615
771.1
771.5
0.40
4.15
1.66
779.4
781
1.60
2.63
4.21
Including
779.4
779.8
0.40
7.52
3.00
Including
780.5
781
0.50
1.73
0.86
BAR-26-0616
937.8
939.0
1.20
5.75
6.90
Including
937.8
938.6
0.80
1.93
1.04
Including
938.6
939.0
0.40
13.40
5.36
1,035.8
1,037.9
2.10
3.42
7.18
Including
1,035.8
1,036.2
0.40
0.85
0.34
Including
1,036.2
1,037.0
0.80
5.77
4.62
Including
1,037.0
1,037.4
0.40
2.66
1.06
BAR-26-0617
796.6
798.5
1.90
7.59
14.42
Including
796.6
797.2
0.60
4.46
2.68
797.2
797.8
0.60
17.75
10.65
797.8
798.5
0.70
1.10
0.77
879.0
881.5
2.50
4.60
11.50
Including
879.0
879.4
0.40
1.37
0.55
Including
879.4
879.7
0.30
8.97
2.69
Including
879.7
881.0
1.30
1.46
1.90
Including
881.0
881.5
0.50
11.10
5.55
BAR-26-0618
878.3
879.0
0.70
0.97
0.68
BAR-26-0619
581.6
582.0
0.40
4.68
1.87
888.0
890.2
2.20
6.48
14.26
Including
888.0
888.4
0.40
3.29
1.32
Including
888.4
888.8
0.40
5.29
2.12
Including
888.8
889.1
0.30
3.86
1.16
Including
889.1
889.4
0.30
3.49
1.05
Including
889.4
889.7
0.30
0.14
0.04
Including
889.7
890.2
0.50
17.15
8.58
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
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.
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 Resources
Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets
anchored by a central milling facility in Québec, Canada. The Company's assets include the Gladiator,
Barry
(1)
, Moroy, and Bachelor
(2)
gold deposits, which collectively hold 16.8 million tonnes ("
Mt
") at an
average grade of 3.02 g/t Au for 1.63 million ounces ("
Moz
") of Measured & Indicated Mineral
Resources, plus 15.6 Mt at 4.32 g/t Au for 2.17 Moz at an average grade of 4.32 g/t Au of Inferred
Mineral Resources.
In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining
Inc. ("
Osisko Mining
") 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$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 on or before 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.
1)
See news release of the Company dated February 23, 2026, and titled "Bonterra Reports Significant Mineral Resources Growth at Barry and
Gladiator Deposits" for further details.
2)
See news release of the Company dated April 1st, 2026, and titled "Bonterra Reports Significant Mineral Resource Growth at Bachelor and
Moroy, 100% owned Deposits and Provides Corporate Updates" for further details.
This news release, including the drill results and the Mineral Resource Estimates referenced herein, has
been prepared solely by the Company and is based on information available to the Company as of the
date hereof. Neither Gold Fields Limited nor its affiliate Windfall Mining Group Inc. has verified,
approved or endorsed the Mineral Resource Estimates or the content of this news release, and no
representation or warranty is made by Gold Fields Limited or Windfall Mining Group Inc. with respect
thereto. References to the Phoenix Joint Venture are provided for contextual purposes only and should
not be construed as statements made by, or on behalf of, Gold Fields Limited or Windfall Mining Group
Inc.
FOR ADDITIONAL INFORMATION
Cesar Gonzalez, Executive Chairman & Interim CEO
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 news release contains forward-looking statements within the meaning of applicable securities laws.
All statements other than statements of historical fact may be forward-looking and are often identified by
words such as "may", "will", "plan", "expect", "anticipate", "estimate", and "intend". Forward-looking
statements in this release include, without limitation, statements regarding the 2026 exploration program
and Gold Fields' ability to complete the remaining earn-in expenditures under the JV Agreement.
These statements are based on assumptions considered reasonable by management, including
assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued
advancement of work by Gold Fields. However, forward-looking statements involve known and unknown
risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks
include, but are not limited to, changes to exploration plans, results that differ from expectations,
operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing
and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price
fluctuations, and the availability of financing. Additional information regarding risks can be found in the
Company's filings at
www.sedarplus.ca
.
Readers are cautioned not to place undue reliance on forward-looking statements. The Company does
not undertake to update any forward-looking statement except as required by applicable securities laws.
All forward-looking statements in this release are expressly qualified by this cautionary statement.
To view the source version of this press release, please visit
https://www.newsfilecorp.com/release/300015