Bonterra Intersects 34.7 g/t Au over 2.4 m at the Barry Underground Project and Provides an Update on the Duke Property Joint Venture Drill Program
2872 Sullivan Road, Suite 2
Val-d’Or, Quebec
Office: (819) 825-8678
Bonterra Intersects 34.7 g/t Au over 2.4 m at the Barry Underground Project
and Provides an Update on the Duke Property Joint Venture Drill Program
Val-d’Or, QC – March 27, 2023 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF,
FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce more results from the now
completed infill drilling campaign at the Barry underground project, which holds 0.5 million
ounces of Measured and Indicated Mineral resou rces and 0.7 million ounces of Inferred Mineral
resources according to the last mineral resources estimate (the “ 2021 MRE”, see press release
dated June 23, 2021) . The primary goal of this campaign was to convert mineral resources to a
higher confidence category and enhance the interpretation and grade continuity of the
mineralization in the upper section of the deposit. In total, 31,349 meters (“m”) (91 holes) of infill
drilling has been completed from surface since August 2022. The Company has received assays
for 75 holes so far, including the ones in this release (see press releases dated November 15, 2022
and December 12, 2022 for previously released holes).
Highlights include:
• 34.7 g/t Au over 2.4 m, including 72.0 g/t Au over 1.1 m in hole MB-22-560A
• 17.7 g/t Au over 3.2 m, including 30.1 g/t Au over 1.8 m in hole MB-23-594
• 11.6 g/t Au over 3.3 m, including 19.8 g/t Au over 1.8m in hole MB-23-589
• 9.0 g/t Au over 9.2 m, including 21.7 g/t Au over 2.0 m in hole MB-22-578
• 8.2 g/t Au over 6.0 m, including 17.6 g/t Au over 2.7 m in hole MB-22-556
• 6.4 g/t Au over 4.0 m, including 13.2 g/t Au over 1.2 m in hole MB-22-565A
Duke Joint Venture Drill Program Update
In March, the Company announced a 3,300 m drill program at the Duke property (“Duke”), a joint
venture with Osisko Mining Inc. (“Osisko”). As of now, six of ten holes have been drilled, and
the drilling activities are tracking on schedule (see press release dated March 6, 2023). The drill
results are expected to be released upon completion of the program.
The drill program at Duke is part of the Company's renewed focus on regional exploration at a rate
of approximately 1,400 m per month in the Urban-Barry and Bachelor camps.
Marc André Pelletier, President and CEO commented: “The exploration program at Duke in
collaboration with our joint venture partner Osisko is progressing well. Duke is located adjacent
to the Company's Gladiator deposit and Osisko's Windfall gold project, as well as the Barry deposit
to the west. Together, these three deposits contain a significant gold resource of over 10 million
ounces, and the Company remains focused on exploring the Urban -Barry camp this year.
Following the completion of the infill drill program at the Barry underground project, the Company
plans to update the geological model of the underground deposit to determine the next steps for
the Barry deposit. Additionally, an exploration program will soon take place at the Barry Northeast
and Panache properties to test high potential exploration targets.”
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Diamond Drilling Results Highlights:
Figure 1 – Barry Project –Surface Plan, Holes, and Highlights Location
The completed infill drill program of the Barry underground project was designed to convert the
Inferred resources from the 2021 MRE into Indicated resources by decreasing the drill spacing to
25 m. The program especially aims to delineate and expand high -grade mineralized shoots
identified in the 2021 MRE. Results from recent assays , including those in this press release,
underscore the potential of increasing quantity and continuity of the underground mineralization.
Figure 2 – Barry Project – Composite Long Section of the Barry Deposit Looking
Northwest
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Infill drilling in the 800 zone continue to delineate and increase the length and continuity of the
high-grade shoots. Results like 34.7 g/t Au over 2.4m including 72.0 g/t Au over 1.1 m in hole
MB-22-560A, 16.3 g/t Au over 2.8 m including 26.6 g/t Au over 1.7 m in hole MB -22-585 and
17.7 g/t Au over 3.2 m including 30.1 g/t Au over 1.8 m in hole MB-23-594 enhance the potential
of high grade continuous mineralized shoots in the 800 zone (Figure 3). Assays from 17 holes
drilled in the zone 800 during winter are pending.
Figure 3 – Barry Project – Long Section, Zone 800 Looking Northwest
Infill Drilling into the H6/D4 moderate south dipping self -intersecting zones helped to better
constrain the high-grade mineralization highlighted by the 2021 MRE. Infill drilling continues to
highlight the continuity of high-grade shoots through the mineralized shears. Results as 9.0 g/t Au
over 9.2 m including 21.7 g/t Au over 2.0 m in hole MB -22-578, 5.6 g/t Au over 6.3 m including
10.7 g/t Au over 2.0 m in hole MB-22-575 and 4.6 g/t Au over 7.7 m including 9.2 g/t Au over 2.5
m and 11.5 g/t Au over 0.7 m in hole MB-22-554 enhance the 300 m long continuity of large high
grade shoots in zone H6 (Figure 4).
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Figure 4 – Barry Project – Long Section, Zone H6 and D4 Looking Northwest
Infill drilling in poorly defined H18 zone following the high -grade shoots has successfully
intercepted high mineralization were predicted. Drill results highlight the potential for a 300 m
long mineralized shoot in the shear zone located 20 m beneath the H6 shear. Demonstration is
made by results in hole MB-22-565A with 6.4 g/t Au over 4.0 m including 13.2 g/t Au over 1.2 m,
hole MB-22-564 returning 3.0 g/t Au over 10.4 m including 13.4 g/t Au over 1.1 m hole MB -22-
575 intercepting 4.7 g/t Au over 8.1 g/t Au including 11.6 g/t Au over 1.5 m and hole MB-22-578
with 10.7 g/t Au over 1.5 m.
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Figure 5 – Barry Project – Long Section, Zone H16 Looking Northwest
Barry Deposit Geology
The Barry gold 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 from 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 kilometre
along strike and 700 m below surface and remains open for expansion.
Diamond Drill Hole Results Table:
The following table shows the significant intersections of the drill holes presented in this press
release.
Program Hole ID From (m) To (m) Length (m) Grade
(g/t Au)
Metal Factor
(length x Grade) Zones
Underground Infill MB-22-543 90.0 98.5 8.5 0.8 6.7 H6
Underground Infill MB-22-550 159.0 164.0 5.0 1.9 9.7 H26
Underground Infill MB-22-550 Including 161.0 162.6 1.6 5.3 8.4 H26
Underground Infill MB-22-550 253.0 258.5 5.5 1.4 7.5 H8
Underground Infill MB-22-550 261.6 268.8 7.2 1.0 6.9 H8
Underground Infill MB-22-550 272.5 274.7 2.2 5.7 12.6 H8
Underground Infill MB-22-550 441.4 449.0 7.6 1.2 9.2 H12
Underground Infill MB-22-550 Including 444.2 445.5 1.3 5.5 7.2 H12
Underground Infill MB-20-253ext 549.4 555.0 5.6 2.5 14.3 H12
Underground Infill MB-20-253ext Including 551.2 554.5 3.3 4.2 13.8 H12
Hydrogeology HG-22-003 5.3 8.3 3.0 3.7 11.0 D7
Hydrogeology HG-22-003 Including 7.6 8.3 0.7 9.5 6.6 D7
Hydrogeology HG-22-005 20.0 32.3 12.3 2.2 27.4 AB28
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Program Hole ID From (m) To (m) Length (m) Grade
(g/t Au)
Metal Factor
(length x Grade) Zones
Hydrogeology HG-22-005 Including 26.0 28.0 2.0 6.5 13.1 AB28
Underground Infill MB-22-551 51.3 57.8 6.5 1.1 7.0 New
Underground Infill MB-22-551 Including 56.0 56.5 0.5 10.9 5.5 New
Underground Infill MB-22-551 109.1 122.4 13.3 1.6 20.8 D9
Underground Infill MB-22-551 Including 109.1 109.7 0.6 8.4 5.0 D9
Underground Infill MB-22-551 131.9 163.7 31.8 1.5 46.9 D4
Underground Infill MB-22-551 Including 140.9 141.4 0.5 13.3 6.7 D4
Underground Infill MB-22-551 and Including 149.0 149.6 0.6 25.0 15.0 D4
Underground Infill MB-22-552A 157.9 163.8 5.9 1.8 10.7 H26
Underground Infill MB-22-552A Including 160.9 162.8 1.9 4.6 8.7 H26
Underground Infill MB-22-552A 190.1 193.9 3.8 6.7 25.3 H6
Underground Infill MB-22-552A 197.3 198.0 0.7 8.9 6.3 H6
Underground Infill MB-22-552A 270.5 273.6 3.1 2.7 8.3 H8
Underground Infill MB-22-553 139.2 142.0 2.8 2.1 5.8 New
Underground Infill MB-22-553 164.6 168.9 4.3 1.8 7.8 H17
Underground Infill MB-22-553 172.9 183.4 10.5 4.0 41.7 H6/D4
Underground Infill MB-22-553 Including 176.5 177.0 0.5 13.7 6.9 H6/D4
Underground Infill MB-22-553 and Including 180.4 181.6 1.2 8.6 10.3 H6/D4
Underground Infill MB-22-553 183.4 207.8 24.4 0.3 7.6 Intrusiv D2
Underground Infill MB-22-554 106.0 113.7 7.7 4.6 35.4 H6
Underground Infill MB-22-554 Including 107.1 109.6 2.5 9.2 23.0 H6
Underground Infill MB-22-554 and Including 113.0 113.7 0.7 11.5 8.1 H6
Underground Infill MB-22-555 230.6 232.5 1.9 4.0 7.7 D4
Underground Infill MB-22-555 270.2 279.9 9.7 1.3 12.8 H8
Underground Infill MB-22-555 Including 277.5 279.9 2.4 3.5 8.5 H8
Underground Infill MB-22-555 390.2 393.2 3.0 3.7 11.1 H3
Underground Infill MB-22-555 Including 390.7 392.5 1.8 6.1 11.0 H3
Underground Infill MB-22-556 314.7 323.0 8.3 0.9 7.5 D4
Underground Infill MB-22-556 505.0 511.0 6.0 8.2 48.9 H12
Underground Infill MB-22-556 Including 505.0 507.7 2.7 17.6 47.5 H12
Underground Infill MB-22-557 37.0 39.5 2.5 4.7 11.8 802
Underground Infill MB-22-557 112.8 118.5 5.7 1.1 6.1 D5
Underground Infill MB-22-557 276.6 283.8 7.2 4.2 29.9 H1
Underground Infill MB-22-557 Including 280.6 283.8 3.2 9.2 29.4 H1
Underground Infill MB-22-558B 64.0 68.3 4.3 3.1 13.3 801
Underground Infill MB-22-558B Including 64.0 65.1 1.1 8.1 8.9 801
Underground Infill MB-22-558B 82.4 104.3 21.9 2.7 59.1 800
Underground Infill MB-22-558B Including 97.0 101.5 4.5 9.3 41.9 800
Underground Infill MB-22-558B 122.0 124.0 2.0 2.7 5.4 AB01
Underground Infill MB-22-558B 335.5 338.0 2.5 4.6 11.5 H3
Underground Infill MB-22-558B Including 336.5 337.0 0.5 16.3 8.2 H3
Underground Infill MB-22-559A 232.8 233.8 1.0 5.2 5.2 H6
Underground Infill MB-22-559A 248.7 252.3 3.6 2.4 8.6 D4
Underground Infill MB-22-559A 286.0 302.9 16.9 1.1 18.0 Intrusiv D2
Underground Infill MB-22-559A Including 300.0 302.4 2.4 5.3 12.6 Intrusiv D2
Underground Infill MB-22-559A 306.0 318.6 12.6 0.4 5.0 Intrusiv D2
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Program Hole ID From (m) To (m) Length (m) Grade
(g/t Au)
Metal Factor
(length x Grade) Zones
Underground Infill MB-22-560A 39.0 39.5 0.5 17.2 8.6 New H
Underground Infill MB-22-560A 131.6 134.0 2.4 34.7 83.3 800
Underground Infill MB-22-560A Including 132.1 133.2 1.1 72.0 79.2 800
Underground Infill MB-22-560A 289.5 298.8 9.3 1.9 17.7 H1
Underground Infill MB-22-560A Including 293.0 295.7 2.7 3.2 8.6 H1
Underground Infill MB-22-561 101.3 109.0 7.7 1.2 9.2 H6
Underground Infill MB-22-561 181.7 188.0 6.3 0.8 5.0 H8
Underground Infill MB-22-562 78.4 78.9 0.5 41.0 20.5 802
Underground Infill MB-22-562 120.4 144.0 23.6 1.5 35.4 AB14
Underground Infill MB-22-562 Including 120.4 122.9 2.5 9.5 23.8 AB14
Underground Infill MB-22-563 77.8 80.3 2.5 7.4 18.5 805
Underground Infill MB-22-563 Including 77.8 78.3 0.5 33.6 16.8 805
Underground Infill MB-22-563 101.7 103.7 2.0 4.7 9.4 800
Underground Infill MB-22-563 111.0 125.7 14.7 1.8 26.5 AB14
Underground Infill MB-22-563 Including 113.7 115.2 1.5 8.9 13.4 AB14
Underground Infill MB-22-563 and Including 118.5 121.6 3.1 2.8 8.7 AB14
Underground Infill MB-22-563 133.3 137.8 4.5 1.7 7.7 AB01
Underground Infill MB-22-564 126.6 137.0 10.4 3.0 31.0 H18
Underground Infill MB-22-564 Including 129.7 130.8 1.1 13.4 14.8 H18
Underground Infill MB-22-564 and Including 132.8 134.5 1.7 4.8 8.2 H18
Underground Infill MB-22-565A 137.0 141.0 4.0 6.4 25.6 H18
Underground Infill MB-22-565A Including 139.2 140.4 1.2 13.2 15.8 H18
Underground Infill MB-22-566 81.3 88.0 6.7 1.0 6.7 AB11
Underground Infill MB-22-566 98.6 99.5 0.9 12.1 10.9 New
Underground Infill MB-22-566 106.5 124.4 17.9 0.3 5.4 Intrusiv D2
Underground Infill MB-22-566 212.0 218.2 6.2 1.9 11.8 H28
Underground Infill MB-22-566 237.9 245.8 7.9 0.8 6.3 New
Underground Infill MB-22-567 106.2 108.0 1.8 3.8 6.8 H18
Underground Infill MB-22-568 205.4 206.0 0.6 19.4 11.6 H17
Underground Infill MB-22-568 265.0 273.0 8.0 1.0 8.0 D2 Intrusiv
Underground Infill MB-22-569 43.0 52.0 9.0 1.7 15.3 800
Underground Infill MB-22-569 Including 43.0 43.9 0.9 6.6 5.9 800
Underground Infill MB-22-569 104.9 108.6 3.7 6.0 22.2 D2
Underground Infill MB-22-569 Including 106.9 107.9 1.0 17.0 17.0 D2
Underground Infill MB-22-569 251.7 253.7 2.0 3.4 6.8 H1
Underground Infill MB-22-569 Including 252.7 253.7 1.0 5.5 5.5 H1
Underground Infill MB-22-569 303.1 304.9 1.8 8.9 16.0 H3
Underground Infill MB-22-569 Including 303.1 304.0 0.9 13.2 11.9 H3
Underground Infill MB-22-570 161.0 166.7 5.7 3.4 19.4 AB19
Underground Infill MB-22-570 Including 163.8 166.7 2.9 5.6 16.2 AB19
Underground Infill MB-22-570 208.8 212.3 3.5 2.9 10.2 800
Underground Infill MB-22-570 353.7 357.2 3.5 1.8 6.3 H1
Underground Infill MB-22-570 Including 355.7 357.2 1.5 4.1 6.2 H1
Underground Infill MB-22-570 420.1 427.6 7.5 0.8 6.0 H3
Underground Infill MB-22-571 210.3 216.4 6.1 1.5 9.2 H6
Underground Infill MB-22-571 Including 214.6 215.4 0.8 8.5 6.8 H6
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Program Hole ID From (m) To (m) Length (m) Grade
(g/t Au)
Metal Factor
(length x Grade) Zones
Underground Infill MB-22-571 243.6 246.0 2.4 2.8 6.7 D4
Underground Infill MB-22-571 Including 243.6 244.2 0.6 9.0 5.4 D4
Underground Infill MB-22-572 107.7 119.2 11.5 1.3 14.8 H6
Underground Infill MB-22-572 196.0 199.1 3.1 4.1 12.8 H8
Underground Infill MB-22-573 14.4 31.2 16.8 1.6 26.9 D4
Underground Infill MB-22-573 Including 16.3 18.6 2.3 8.0 18.4 D4
Underground Infill MB-22-573 37.0 74.5 37.5 0.3 11.3 D2 Intrusiv
Underground Infill MB-22-573 147.0 163.2 16.2 3.5 56.7 D2 Intrusiv
Underground Infill MB-22-573 Including 154.6 155.6 1.0 53.8 53.8 D2 Intrusiv
Underground Infill MB-22-573 275.4 277.0 1.6 8.9 14.2 H1
Underground Infill MB-22-573 Including 275.4 276.0 0.6 22.9 13.7 H1
Underground Infill MB-22-574 61.1 70.1 9.0 0.6 5.7 H6
Underground Infill MB-22-574 133.9 137.3 3.4 1.8 6.0 H8
Underground Infill MB-22-575 132.3 140.6 8.3 0.9 7.5 New_H
Underground Infill MB-22-575 Including 134.0 140.6 6.6 1.0 6.6 New_H
Underground Infill MB-22-575 207.0 213.3 6.3 5.6 35.3 H6
Underground Infill MB-22-575 Including 208.0 210.0 2.0 10.7 21.4 H6
Underground Infill MB-22-575 219.9 231.1 11.2 3.6 40.3 H18
Underground Infill MB-22-575 Including 219.9 228.0 8.1 4.7 38.1 H18
Underground Infill MB-22-575 Including 226.5 228.0 1.5 11.6 17.4 H18
Underground Infill MB-22-575 298.0 310.2 12.2 0.8 9.8 D2 Intrusiv
Underground Infill MB-22-575 Including 301.6 303.4 1.8 3.0 5.4 D2 Intrusiv
Underground Infill MB-22-576 22.0 28.6 6.6 5.0 33.0 D4
Underground Infill MB-22-576 Including 25.6 28.6 3.0 9.9 29.7 D4
Underground Infill MB-22-576 40.5 134.6 94.1 0.2 18.8 D2 Intrusiv
Underground Infill MB-22-576 159.0 179.5 20.5 0.4 8.2 D2
Underground Infill MB-22-576 193.4 194.1 0.7 12.3 8.6 New_H
Underground Infill MB-22-577 2.4 77.0 74.6 0.2 14.9 Intrusiv D2
Underground Infill MB-22-577 144.5 147.5 3.0 5.9 17.7 D2
Underground Infill MB-22-577 Including 144.5 146.0 1.5 10.4 15.6 D2
Underground Infill MB-22-577 198.5 204.2 5.7 0.9 5.1 H28
Underground Infill MB-22-578 178.0 186.0 8.0 0.7 5.3 H17
Underground Infill MB-22-578 193.0 202.2 9.2 9.0 82.8 H6
Underground Infill MB-22-578 Including 194.0 196.0 2.0 21.7 43.4 H6
Underground Infill MB-22-578 216.0 217.5 1.5 10.7 16.0 H18
Underground Infill MB-22-578 257.5 270.5 13.0 0.8 10.7 H8
Underground Infill MB-22-579 121.0 127.0 6.0 0.9 5.5 D6
Underground Infill MB-22-580 227.7 231.5 3.8 4.0 15.3 H6
Underground Infill MB-22-580 Including 231.0 231.5 0.5 12.4 6.2 H6
Underground Infill MB-22-580 287.2 292.8 5.6 3.1 17.4 D4
Underground Infill MB-22-580 Including 287.2 289.0 1.8 5.9 10.6 D4
Underground Infill MB-22-581 2.6 55.0 52.4 0.4 18.5 Intrusiv D2
Underground Infill MB-22-581 216.6 221.2 4.6 2.0 9.3 H1
Underground Infill MB-22-581 Including 218.2 219.0 0.8 6.8 5.4 H1
Underground Infill MB-22-582 103.0 104.0 1.0 6.2 6.2 Intrusiv D2
Underground Infill MB-22-582 123.1 125.1 2.0 2.7 5.3 Intrusiv D2