Drilling Intersects Wide High-Grade at Osisko’s Windfall



77.6 g/t Au Over 17.3 Metres; and 45.8 g/t Au Over 11.0 Metres in Lynx 4




124 g/t Au Over 8.0 Metres in Triple Lynx

TORONTO, Jan. 18, 2022 (GLOBE NEWSWIRE) — Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results that have not been included in the recently released mineral resource estimate (“MRE”) (

see Osisko news release dated January 10,


2022

) are presented below, and include 94 intercepts in 28 drill holes (9 from surface, 19 from underground) and 25 wedges. The infill intercepts are located inside defined January 2022 MRE blocks. The expansion intercepts are located outside the January 2022 MRE blocks and either expand MRE wireframes or are in a defined zone or corridor but do not yet correlate to a specific MRE wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Today’s results serve as a reminder that Windfall continues to grow in size, underscored by some of these new wide high-grade hits as the deposit opens up in the heart of the Lynx system. By virtue of the current resource, Windfall is the largest high-grade million ounce plus deposit ever discovered in Québec, and it has been steadily moving up the global list of top high-grade underground gold deposits. There is nothing quite like Windfall in Canada, or even globally.”

Selected high-grade intercepts include:

482 g/t Au over 5.7 metres

and

380 g/t Au over 3.2 metres

in OSK-W-21-1432-W10;

77.6 g/t Au over 17.3 metres

in OSK-W-21-1949-W14;

124 g/t Au over 8.0 metres

in OSK-W-21-2587-W2;

45.8 g/t Au over 11.0 metres

and

143 g/t Au over 3.4 metres

in WST-21-0707;

87.9 g/t Au over 3.2 metres

in OSK-W-21-2465-W5;

83.0 g/t Au over 3.0 metres

in WST-21-0895A,

37.0 g/t Au over 6.4 metres

in OSK-W-21-2613 and

28.1 g/t Au over 6.0 metres

in OSK-W-21-2644. Maps showing hole locations and full analytical results are available at


www.osiskomining.com


.



Infill Drilling


Hole No.

From

(m)

To

(m)

Interval

(m)

Au (g/t)

uncut

Au (g/t)

cut to

100 g/t

Zone

Corridor

OSK-W-21-1432-W10

957.3

960.5

3.2

380

44.9

LX4_3460


Lynx 4


including
958.0 958.4 0.4 1240 100

and
959.7 960.1 0.4 1640 100

OSK-W-21-1432-W11

955.3

957.3

2.0

10.8


LX4_3433


Lynx 4


including
956.4 956.8 0.4 45.0

OSK-W-21-1432-W12

988.3

991.4

3.1

16.7


LX4_3460


Lynx 4


including
991.0 991.4 0.4 95.9

OSK-W-21-1871-W1

949.0

951.0

2.0

5.81


UDD_4501


Underdog


including
949.6 950.0 0.4 27.7

OSK-W-21-1871-W2

507.0

509.0

2.0

4.50


CA2_2225


Caribou


including
508.0 508.7 0.7 12.4

OSK-W-21-1949-W12

1047.9

1050.0

2.1

3.57


LX4_3430

Lynx 4

OSK-W-21-1949-W14

749.0

751.0

2.0

47.8

30.1

LXM_3345


Lynx


including
749.0 749.5 0.5 171 100


1163.0

1180.3

17.3

77.6

27.2

LX4_3463


Lynx 4


including
1169.8 1170.2 0.4 704 100

and
1172.8 1173.2 0.4 481 100

and
1173.6 1174.0 0.4 1195 100

OSK-W-21-2479-W11

976.5

978.5

2.0

14.3


UDD_4910


Underdog


including
976.9 977.5 0.6 44.6

OSK-W-21-2531-W4

590.3

592.4

2.1

9.37


CA2_2266

Caribou


595.0

597.0

2.0

7.06


CA2_2266

Caribou


618.7

620.7

2.0

3.86


CA2_2257


Caribou


including
619.7 620.3 0.6 9.46

777.2

781.0

3.8

13.8


UDD_4112


Underdog


including
777.2 777.7 0.5 81.5

OSK-W-21-2544-W1

781.4

783.4

2.0

3.68


TLX_3171

Triple Lynx



976.1

981.0

4.9

8.30


TLX_3195


Triple Lynx


including
976.1 976.4 0.3 50.0

OSK-W-21-2544-W2

802.0

804.3

2.3

20.0


TLX_3159


Triple Lynx


including
802.0 802.6 0.6 59.4


909.8

911.8

2.0

10.7


TLX_3193


Triple Lynx


including
910.4 910.8 0.4 52.1


921.6

923.7

2.1

10.3


TLX_3194


Triple Lynx


including
922.4 922.7 0.3 71.6

OSK-W-21-2544-W4

770.3

773.0

2.7

14.6


TLX_3171


Triple Lynx


including
771.0 771.7 0.7 44.0


776.0

780.0

4.0

8.74


TLX_3171

Triple Lynx

OSK-W-21-2587-W1

1119.0

1126.0

7.0

21.0


TLX_3172


Triple Lynx


including
1123.5 1124.0 0.5 99.1

and
1125.7 1126.0 0.3 67.8

OSK-W-21-2587-W2

1134.0

1142.0

8.0

124

36.9

TLX_3172


Triple Lynx


including
1136.7 1137.0 0.3 1685 100

and
1139.7 1140.4 0.7 371 100

OSK-W-21-2612-W1

396.0

398.0

2.0

4.50


Z27_1115

Zone 27

OSK-W-21-2613

911.0

913.0

2.0

6.35


TLX_3161

Triple Lynx


944.1

950.5

6.4

37.0

33.1

TLX_3161


Triple Lynx


including
947.3 947.6 0.3 114 100

and
947.9 948.4 0.5 142 100

OSK-W-21-2618

60.0

62.2

2.2

13.9


WFN_7003


Windfall North


including
60.0 61.0 1.0 30.2

OSK-W-21-2621-W1

629.3

633.0

3.7

13.7


UDD_4100

Underdog

including
629.3 629.7 0.4 31.9
UDD_4100


Underdog


and
632.0 633.0 1.0 31.5

OSK-W-21-2626

103.4

106.0

2.6

13.7


F11_6001

F-11

OSK-W-21-2635

555.8

558.0

2.2

3.98


CA2_2232

Caribou

OSK-W-21-2637

548.0

550.0

2.0

13.9


CAE_2559


Caribou


including
548.8 549.4 0.6 44.0

OSK-W-21-2641

131.8

133.8

2.0

25.6


F11_6009


F-11


including
132.6 133.2 0.6 64.0

OSK-W-21-2645

126.1

128.1

2.0

19.0


F11_6000


F-11


including
126.1 126.9 0.8 45.1


133.0

135.0

2.0

10.1


F11_6000

F-11

WST-21-0649

710.4

714.4

4.0

27.3

26.5

LX4_3427


Lynx 4


including
710.4 710.8 0.4 109 100

WST-21-0707

180.0

183.4

3.4

143

67.8

LXM_3388


Lynx


including
182.2 183.4 1.2 255 100


499.5

510.5

11.0

45.8

38.4

LX4_3430


Lynx 4


including
499.5 500.0 0.5 99.2

and
507.0 507.8 0.8 202 100


532.1

537.4

5.3

8.43


LX4_3434


Lynx 4


including
535.7 536.1 0.4 17.7

and
536.7 537.4 0.7 29.1

WST-21-0861

87.0

89.5

2.5

24.3

24.2

LXM_3339


Lynx


including
88.9 89.5 0.6 101 100

WST-21-0864A

257.5

259.5

2.0

4.94


LHW_3203


Lynx HW


including
258.2 258.8 0.6 15.0

WST-21-0878

503.9

506.2

2.3

4.30


LX4_3401


Lynx 4


including
505.5 505.8 0.3 27.6


614.0

616.4

2.4

25.1


LX4_3448


Lynx 4


including
614.0 614.6 0.6 99.1

WST-21-0883

341.4

343.5

2.1

5.88


TLX_3166


Triple Lynx


including
342.2 342.5 0.3 27.7

WST-21-0895A

480.3

482.8

2.5

26.6


LX4_3404


Lynx 4


including
481.4 481.8 0.4 75.1


519.3

522.3

3.0

83.0

44.0

LX4_3440


Lynx 4


including
520.0 520.7 0.7 254 100

WST-21-0900

291.6

294.4

2.8

18.9


LHW_3216


Lynx HW


including
294.0 294.4 0.4 84.8

WST-21-0905C

52.3

54.5

2.2

13.7


LXM_3339


Lynx


including
52.9 53.4 0.5 52.2


65.6

69.0

3.4

12.7


LXM_3311


Lynx


including
66.5 67.0 0.5 34.8


211.0

213.0

2.0

11.2


LSW_3504

Lynx SW

WST-21-0907

543.2

545.4

2.2

5.02


LX4_3401

Lynx 4

WST-21-0908B

195.0

197.0

2.0

15.6


TLX_3121


Triple Lynx


including
195.3 195.7 0.4 62.9

WST-21-0911

175.7

177.9

2.2

10.5


LXM_3388


Lynx


including
177.3 177.9 0.6 21.3


526.9

529.0

2.1

4.41


LX4_3404


Lynx 4


including
527.3 527.6 0.3 25.4


530.0

532.0

2.0

3.68


LX4_3404

Lynx 4

WST-21-0913

526.0

528.0

2.0

11.0


LX4_3450


Lynx 4


including
527.1 527.4 0.3 68.5

WST-21-0916A

526.8

529.0

2.2

11.9


LX4_3450


Lynx 4


including
526.8 527.2 0.4 57.4

WST-21-0918

345.0

347.0

2.0

26.4

25.9

TLX_3131


Triple Lynx


including
346.0 346.5 0.5 102 100


516.7

518.7

2.0

30.7


LX4_3401


Lynx 4


including
517.8 518.3 0.5 72.5

WST-21-0932

155.0

157.0

2.0

10.9


LXM_3388


Lynx


including
155.8 156.1 0.3 47.1


182.0

184.0

2.0

3.89


LHW_3206

Lynx HW

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See

“Quality Control and Reporting Protocols”

below. CAE and CA2 = Caribou, LX4 = Lynx 4, LHW = Lynx Hanging Wall, LXM = Lynx Main, LSW = Lynx Southwest, TLX = Triple Lynx, UDD = Underdog, WNF = Windfall North, F11 = F11 Zone, and Z27 = Zone 27.



Expansion Drilling


Hole No.

From

(m)

To (m)

Interval

(m)

Au (g/t)

uncut

Au (g/t)

cut to

100 g/t

Zone

Corridor

OSK-W-21-1432-W10

851.5

853.5

2.0

4.70


LX4

Lynx 4


915.7

921.4

5.7

482

27.5

LX4


Lynx 4


including
915.7 916.2 0.5 975 100

and
917.6 917.9 0.3 2540 100

and
920.8 921.1 0.3 4330 100

OSK-W-21-1871-W1

941.6

946.7

5.1

8.53

UDD


Underdog


including
941.6 942.1 0.5 23.2

and
944.8 945.1 0.3 40.9

OSK-W-21-1871-W3

722.3

724.4

2.1

11.2


UDD


Underdog


including
723.7 724.4 0.7 23.2

OSK-W-21-1949-W12

1018.8

1021.0

2.2

19.0


LX4

Lynx 4


1144.2

1146.5

2.3

10.2


LX4


Lynx 4


including
1144.2 1145.0 0.8 29.2

OSK-W-21-1949-W14

1060.7

1062.7

2.0

6.93


LX4


Lynx 4


including
1061.5 1062.0 0.5 23.2


1068.7

1070.7

2.0

5.92


LX4

Lynx 4


1137.8

1140.4

2.6

4.01


LX4


Lynx 4


including
1139.0 1139.3 0.3 9.74


1185.2

1188.9

3.7

8.84


LX4


Lynx 4


including
1185.2 1185.5 0.3 27.9

and
1188.0 1188.9 0.9 20.4


1203.5

1214.0

10.5

6.26


LX4


Lynx 4


including
1213.6 1214.0 0.4 26.4


1217.0

1219.0

2.0

4.14


LX4

Lynx 4


1228.8

1230.9

2.1

4.81


LX4

Lynx 4

OSK-W-21-2287-W10

1121.5

1124.0

2.5

13.1


LX4


Lynx 4


including
1121.5 1122.5 1.0 32.6

OSK-W-21-2369-W3

962.0

964.0

2.0

32.4

30.5

LX4


Lynx 4


including
962.0 962.6 0.6 106 100

OSK-W-21-2381-W2

1267.2

1269.4

2.2

3.82


LX4


Lynx 4


including
1268.7 1269.4 0.7 10.3

OSK-W-21-2465-W5

824.3

827.5

3.2

87.9

71.8

TLX


Triple Lynx


including
824.3 825.0 0.7 146 100

including
825.5 825.9 0.4 131 100

including
825.9 826.9 1.0 108 100

OSK-W-21-2465-W6

765.5

767.7

2.2

15.1


TLX


Triple Lynx


including
765.5 766.0 0.5 60.0

OSK-W-21-2540-W4

1106.9

1109.0

2.1

48.4

14.7

TLX


Triple Lynx


including
1106.9 1107.2 0.3 336 100

OSK-W-21-2601-W1

1042.0

1044.0

2.0

4.04


TLX

Triple Lynx

OSK-W-21-2621-W1

668.0

670.0

2.0

4.02


UDD

Underdog

OSK-W-21-2629

903.3

907.2

3.9

20.1


LX4


Lynx 4


including
903.3 904.3 1.0 64.2

OSK-W-21-2637

561.3

564.0

2.7

28.0


Caribou

Caribou

OSK-W-21-2640-W1

635.6

637.6

2.0

3.86


Caribou

Caribou

OSK-W-21-2644

504.0

506.0

2.0

6.53


Caribou

Caribou


509.0

511.0

2.0

4.21


Caribou


Caribou


including
509.0 509.7 0.7 10.3


656.0

658.1

2.1

5.69


Caribou

Caribou


662.0

668.0

6.0

28.1


Caribou


Caribou


including
664.0 665.0 1.0 92.6

WST-21-0784

335.8

337.8

2.0

6.02


TLX

Triple Lynx

WST-21-0885B

326.3

331.0

4.7

24.9

19.1

LSW


Lynx SW


including
327.0 327.5 0.5 155 100

and
330.6 331.0 0.4 55.3

WST-21-0907

186.0

188.0

2.0

18.3


TLX


Triple Lynx


including
186.4 186.8 0.4 91.2


549.0

551.0

2.0

13.6


LX4


Lynx 4


including
549.6 550.0 0.4 66.1

WST-21-0909

231.1

233.3

2.2

57.5

51.2

TLX


Triple Lynx


including
232.1 232.5 0.4 135 100

WST-21-0911

564.2

568.8

4.6

7.90


LX4

Lynx 4

WST-21-0918

646.0

648.0

2.0

11.6


LX4

Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See

“Quality Control and Reporting Protocols”

below. LSW = Lynx Southwest, LXM = Lynx Main, LX4 = Lynx 4, TLX = Triple Lynx, UDD = Underdog.



Drill hole location


Hole Number

Azimuth

(°)

Dip (°)

Length

(m)

UTM E

UTM N

Elevation

Section

OSK-W-21-1432-W10
132 -55 1062 453811 5435779 400 4300

OSK-W-21-1432-W11
132 -55 1149 453811 5435779 400 4300

OSK-W-21-1432-W12
132 -55 1113 453811 5435779 400 4300

OSK-W-21-1871-W1
331 -56 1119 452496 5434397 402 2475

OSK-W-21-1871-W2
331 -56 915 452496 5434397 402 2475

OSK-W-21-1871-W3
331 -56 906 452496 5434397 402 2475

OSK-W-21-1949-W12
105 -57 1301 453440 5435479 401 3825

OSK-W-21-1949-W14
105 -57 1332 453440 5435479 401 3825

OSK-W-21-2287-W10
116 -53 1311 453607 5435714 404 4075

OSK-W-21-2369-W3
130 -56 1415 453424 5435566 410 3850

OSK-W-21-2381-W2
134 -53 887 453620 5435790 402 4125

OSK-W-21-2465-W5
123 -61 1062 453398 5435556 413 3825

OSK-W-21-2465-W6
123 -61 993 453398 5435556 413 3825

OSK-W-21-2479-W11
344 -55 1005 452315 5434420 399 2325

OSK-W-21-2531-W4
344 -62 1203 452566 5434415 403 2550

OSK-W-21-2540-W4
117 -60 1297 453465 5435640 410 3925

OSK-W-21-2544-W1
128 -50 1140 452960 5435539 419 3425

OSK-W-21-2544-W2
128 -50 1044 452960 5435539 419 3425

OSK-W-21-2544-W4
128 -50 858 452960 5435539 419 3425

OSK-W-21-2587-W1
127 -59 1176 453350 5435673 418 3850

OSK-W-21-2587-W2
127 -59 1167 453350 5435673 418 3850

OSK-W-21-2601-W1
125 -61 1235 453425 5435657 413 3900

OSK-W-21-2612-W1
333 -51 690 452391 5434638 402 2500

OSK-W-21-2613
114 -53 1092 452981 5435549 420 3450

OSK-W-21-2618
330 -56 248 452279 5435162 411 2650

OSK-W-21-2621-W1
344 -53 765 452272 5434396 399 2275

OSK-W-21-2626
153 -47 156 452299 5435823 406 3000

OSK-W-21-2629
114 -57 1011 453622 5435635 405 4050

OSK-W-21-2635
327 -56 708 452684 5434475 402 2675

OSK-W-21-2637
140 -59 747 452768 5435312 406 3150

OSK-W-21-2640-W1
336 -58 737 452683 5434351 402 2625

OSK-W-21-2641
177 -46 165 452436 5435884 407 3150

OSK-W-21-2644
346 -55 693 452566 5434415 403 2550

OSK-W-21-2645
157 -48 189 452409 5435902 406 3125

WST-21-0649
136 -47 790 453258 5435211 98 3525

WST-21-0707
118 -41 633 453507 5435332 -48 3800

WST-21-0784
132 -66 361 453507 5435327 -7 3800

WST-21-0861
139 -64 307 453106 5435066 231 3325

WST-21-0864A
121 -1 292 453463 5435327 33 3775

WST-21-0878
128 -40 711 453375 5435297 -26 3675

WST-21-0883
126 -59 393 453105 5435065 231 3325

WST-21-0885B
145 -53 377 452954 5435003 253 3175

WST-21-0895A
123 -42 635 453507 5435332 -48 3800

WST-21-0900
122 -13 316 453462 5435326 33 3775

WST-21-0905C
141 -52 511 453221 5435121 134 3450

WST-21-0907
130 -40 701 453374 5435296 -26 3675

WST-21-0908B
118 -43 198 453506 5435326 -90 3800

WST-21-0909
151 -59 426 453507 5435328 -7 3800

WST-21-0911
121 -44 635 453507 5435332 -48 3800

WST-21-0913
138 -49 594 453322 5435236 54 3600

WST-21-0916A
146 -52 586 453321 5435235 54 3600

WST-21-0918
130 -40 663 453374 5435296 -26 3675

WST-21-0932
136 -26 360 453462 5435326 32 3775


Caribou Zone


Mineralization most commonly occurs in gold-bearing pyrite stockworks as well as semi-massive pyrite replacement zones associated with phyllic alteration (sericite-pyrite ± silica) with sulphides, pyrite dominated with minor chalcopyrite and sphalerite ranging from trace to up to 20%, and local visible gold. Mineralization is hosted in rhyolites or mafic-intermediate volcanics frequently at or near faults or the contact with felsic porphyritic intrusions.


Lynx Zone


Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.


Underdog


Mineralization most commonly occurs in gold-bearing quartz-pyrite (± tourmaline) veins and as disseminated, stringer, semi-massive to massive pyrite with minor sphalerite, chalcopyrite and molybdenite associated with strong sericite and silica alteration. Mineralization is hosted along the intrusive contacts of a three-phase composite felsic porphyritic unit which cross-cuts felsic and mafic volcanic sequences.


Windfall North


Mineralization is hosted in sheared andesites and most commonly occurs in gold-bearing quartz veins with trace to 10% pyrite, traces of sphalerite and chalcopyrite, and local visible gold. Mineralization is hosted in a silica-carbonate-sericite alteration envelope and is constrained within shear zones with pervasive sericite-carbonate ± fuchsite ± silica alteration.


Zone 27


Mineralization most commonly occurs as replacement-type characterized by 5% to 50% disseminated, stringer, semi-massive or stockwork pyrite, ptygmatic tourmaline veins, quartz-tourmaline crustiform veins, local quartz-carbonate veins, and local visible gold. Mineralization is associated with moderate to strong sericite, weak to strong silica, weak chlorite and carbonate and locally weak fuchsite and is hosted in strongly altered andesites, in or at the contact of the rhyolite, or along the contacts with felsic porphyritic intrusions.


F-Zones


Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining and occurs as quartz ± ankerite veinlets or as replacement type in shear zones and is characterised by trace to 10% pyrite with local visible gold. Alteration is dominated by sericite-fuchsite-tourmaline-pyrite.


Qualified Person



The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Director of Exploration for Osisko’s Windfall gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).


Quality Control and Reporting Protocols



True


width


determination


is


estimated


at


55-80%


of


the


reported


core


length


interval


for


the


zone.


Assays


are


uncut


except


where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.5 g/t Au diluted over core lengths of at least 2.0 metres. NQ core assays were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (ii) Bureau Veritas in Timmins, Ontario. 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. Selected samples are also analyzed for multi-elements, including silver, using a 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 the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.


About the Windfall Gold Deposit



The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The Mineral Resource Estimate (





MRE





) defined by Osisko, as disclosed in the news release dated January 10, 2022 and assuming a cut-off grade of 3.50 g/t Au,


comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 ounces) in the inferred mineral resource category


. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the January 10, 2022 news release, certain of which are described in the January 10, 2022 news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days from January 10, 2022. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs


in


three


principal


zones:


Lynx,


Main Zone,


and


Underdog.


Mineralization is generally


comprised of


sub-vertical


zones


following


intrusive porphyry


contacts


plunging


to


the


northeast.


The r


esources are defined from


surface


to


a


depth


of


1,600


metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres.


T


he deposit


remains


open along


strike


and


at


depth


.


Mineralization


has


been


identified


at


surface


in


some


areas


and


as


deep


as


2,625


metres in others with significant potential to extend mineralization down-plunge and at


depth.


About Osisko Mining Inc.



Osisko is a mineral exploration company focused on the acquisition, exploration, and development of gold resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau


in


Québec


and


holds


a


100%


undivided


interest


in


a


large


area


of


claims


in


the


surrounding


Urban


Barry


area and nearby Quévillon area (over 2,600 square


kilometres).


Cautionary Note Regarding Forward-Looking Information



This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.


CONTACT INFORMATION:


John Burzynski

Chief Executive Officer

Telephone (416) 363-8653


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