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2021 Exploration Program

Great Bear’s 2021 exploration program runs year-round with an annual budget of $45 million in support field exploration on the Dixie Project as well at Great Bear’s regional projects, Pakwash, Sobel and Red Lake North. The primary focus of the exploration program is at the Dixie Project and continues to be:

• Infill drilling along the extent of the LP Fault;

• Testing the vertical extents of mineralization within the LP Fault, requiring both shallow and deep drilling;

• Testing the regional extents of the LP Fault; and

• Investigation of high-priority regional targets.

Over 100,000 metres of drilling was completed during the nine months ended September 30, 2021, which was lower than drilled metres budgeted due to the forest fire closure in Red Lake. See Regional Forest Fires section before for more details. In addition to drilling, geology crews commenced summer field exploration activities including detailed mapping and channel sampling of surface bedrock. The focus for this work includes identifying sites where mineralization from the LP Fault may be exposed at surface, as well as conducting detailed structural analysis of outcrops to further understand plunges and trends to mineralization.

June 2021 marked the 2-year anniversary of the discovery of the LP Fault, which has now been tested with over 400 drill holes. Significant results from 2021 drilling, organized based on target, included:

Table 1 – Infill Drilling

Drill Hole

 

From (m)

To (m)

Width (m)

Au (g/t)

News Release

BR-271

 

406.25

410.50

4.25

25.12

16-Mar-21

including

407.50

408.00

0.50

197.00

BR-247

 

365.00

371.25

6.25

16.50

22-Apr-21

including

368.00

370.00

2.00

51.05

BR-272

 

313.20

326.30

13.10

10.50

including

313.20

316.90

3.70

33.56

BR-294

 

311.50

329.50

18.00

6.63

including

315.80

318.10

2.30

50.05

BR-321

 

275.55

286.00

10.45

7.88

3-Jun-21

including

276.55

279.05

2.50

29.52

BR-332

 

215.85

222.05

6.20

4.87

21-Jun-21

BR-371

 

334.75

343.00

8.25

5.90

25-Aug-21

including

334.75

335.30

0.55

64.30

BR-394

 

311.50

354.60

43.10

3.83

including

331.60

336.40

4.80

28.18

and including

331.60

332.40

0.80

150.00

 

Table 2 - Shallow Drilling

Drill Hole

 

From (m)

To (m)

Width (m)

Au (g/t)

News Release

BR-238

 

41.80

57.30

15.50

29.17

11-Mar-21

including

49.10

51.10

2.00

51.73

BR-244

 

23.85

39.65

15.80

18.08

including

23.85

25.15

1.30

78.94

BR-298

 

55.25

63.10

7.85

14.72

19-May-21

including

58.30

63.10

4.80

22.79

BR-310

 

43.00

57.80

14.80

4.19

3-Jun-21

including

46.65

49.80

3.15

9.95

BR-314

 

43.35

53.75

10.40

5.39

21-Jun-21

BR-315

 

75.30

96.00

20.70

5.14

BR-343

 

27.50

33.00

5.50

6.73

25-Aug-21

including

27.50

28.75

1.25

21.70

BR-360

 

13.20

48.10

34.90

1.66

including

13.20

14.40

1.20

22.80


Table 3 - Deep Drilling

Drill Hole

 

From (m)

To (m)

Width (m)

Au (g/t)

News Release

BR-260

 

929.30

948.00

18.70

3.33

29-Mar-21

including

942.20

945.25

3.05

15.57

BR-284

 

518.25

530.95

12.70

6.20

22-Apr-21

including

524.20

530.95

6.75

11.18

BR-291

 

482.00

488.50

6.50

7.78

BR-306

 

420.80

425.40

4.60

4.80

21-Jun-21

BR-365

 

523.50

553.00

29.50

3.13

25-Aug-21

including

545.00

553.00

8.00

10.24

and including

545.00

549.00

4.00

15.04

Notably, mineralization intercepted in BR-260 doubled the vertical extent of the LP Fault at depth to approximately 800 vertical metres.

Within the LP Fault, detailed geological modelling using lithologies recorded during drill logging, geochemistry, oriented structural data and 3D modelling software, has resulted in the interpretation of 23 high-grade gold domains along 4 kilometres of the central LP Fault zone. Refer to Figure 1 for details.

Figure 1 - Inclined plan view of the interpreted high-grade gold domains

*News release dated September 9, 2021

Figure 2 depicts the upper 500 metre by 250 metre area of high-grade domain BR7, showing all results to date.

Figure 2 - Upper 500 metre x 250 metre area of high-grade domain BR7

*News release dated May 19, 2021

Figure 3 depicts the upper portions of high-grade domain, BR1, showing all results to date, and intersecting high-grade domain, AURO20, which links BR1 to the previously reported domain, BR7. The lower inset illustrates how the domains intersect in three dimensions in inclined plan view.

Figure 3 - Upper portions of high-grade domain BR1

*News release dated June 3, 2021

Figure 4 depicts the inclined long section of the AURO2 high-grade domain showing all drill holes which intersect the domain. Drill results were originally published by Great Bear between September 3, 2019 and June 3, 2021.  Additional gold-bearing intervals in these holes that intersect adjacent high-grade and bulk tonnage domains have been omitted for clarity.

Figure 4 – Inclined long section at LP Fault high-grade domain AURO2

*News release dated September 9, 2021

These interpreted high-grade domains are enveloped by, and intersect, a larger lower grade bulk tonnage style halo of gold mineralization. Most drill holes intersect both bulk tonnage mineralization and high-grade domains in the LP Fault. Examples of wider lower grade intercepts are highlighted in the table below.

Table 4 – Bulk-tonnage

Drill Hole

 

From (m)

To (m)

Width (m)

Au (g/t)

News Release

BR-291

 

477.00

573.10

96.10

1.00

22-Apr-21

BR-285

 

349.50

441.10

91.60

1.11

19-May-21

including

354.00

362.55

8.55

8.26

BR-286

 

473.60

565.00

91.40

1.00

including

473.60

482.00

8.40

3.27

BR-321

 

254.00

303.25

49.25

2.10

3-Jun-21

including

275.55

286.00

10.45

7.88

BR-304

 

495.15

569.50

74.35

0.73

21-Jun-21

BR-306

 

397.30

504.00

106.70

1.08

BR-333

 

51.00

135.25

84.25

0.71

25-Aug-21

 

125.55

131.10

5.55

4.85

During the summer of 2021, samples from the LP Fault zone were submitted to Blue Coast Research for metallurgical testing. A total of five 20 kilogram samples representing grades ranging from 0.5 g/t to over 20.0 g/t gold were selected for testing. Also, samples classified as potentially mineralogically complex for gold extraction were deliberatly chosen for testing. The resulting gold recovery rates of 95.2% to 99.2% were confirmed, regardless of grade, host rocks, sulphide content and alteration styles, with the highest recoveries present in the highest grade material. Refer to Table 6 for details.

Table 5 – Metallurgical sample descriptions

Test ID

Grade Range

(Au g/t)

Total Weight (kg)

Core length

(m)

Comments

CN21,22

0.50 – 1.0

19.62

12.30

Lower-grade bulk tonnage halo, felsic volcanic with trace sphalerite, <3% pyrite

CN19,20

1.3 – 1.6

19.86

10.10

Bulk tonnage halo, felsic volcanic/metasediment, <2% pyrite, trace arsenopyrite

CN17,18

4.1 – 4.2

21.26

10.65

Transitional mid-grade mineralization proximal to high-grade domains, felsic volcanic <2.5% pyrite, trace sphalerite, <1% arsenopyrite

CN13,14

9.2

21.46

13.00

High-grade from the Auro2 domain which includes the highest observed accessory arsenopyrite content, felsic volcanic <1% pyrite, trace pyrrhotite, 0.3%– 10% arsenopyrite

CN15,16

> 20.0

21.28

11.85

High-grade from the Auro2 domain, felsic volcanic. Up to 10% arsenopyrite, <3% pyrite, trace sphalerite

Table 6 – Gold recovery results from LP Fault composite samples

Test ID

Purpose

NaCN Conc (g/L)

% Solids

Primary Grind (p80, µm)

NaCN Consumption (kg/t)

48-hour Au Recovery (%)

Residue Grade (Au, g/t)

Calculated Head Grade (Au, g/t)

CN-13

Baseline

1

40

77

0.19

98.0

0.18

9.24

CN-14

Lead Nitrate

1

40

75

0.22

97.7

0.21

9.23

CN-15

Baseline

1

40

75

0.23

99.2

0.19

22.98

CN-16

Lead Nitrate

1

40

74

0.27

98.7

0.34

26.58

CN-17

Baseline

1

40

75

0.18

97.5

0.11

4.19

CN-18

Lead Nitrate

1

40

74

0.12

97.3

0.11

4.08

CN-19

Baseline

1

40

75

0.12

96.3

0.06

1.59

CN-20

Lead Nitrate

1

40

74

0.19

96.4

0.05

1.36

CN-21

Baseline

1

40

77

0.23

95.2

0.04

0.75

CN-22

Lead Nitrate

1

40

74

0.12

95.9

0.04

0.97

*Samples were composited from 10 to 13 metre long core intervals and were processed through a standard 48 hour bottle roll procedure at 40% solids, using a 1.0 g/L sodium cyanide (“NaCN”) solution.

 

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