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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 resources 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. The 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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