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GREAT BOULDER RESOURCES LIMITED Capital/Financing Update 2024

Sep 23, 2024

64967_rns_2024-09-23_0ffb89fe-9579-4e93-9bc1-a82867bce3d8.pdf

Capital/Financing Update

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ASX Announcement
24 SEPTEMBER 2024
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KEY TENEMENT ACQUISITIONS UNDERPIN SIDE WELL GROWTH POTENTIAL

HIGHLIGHTS

  • ➢ GBR has acquired key tenements along strike from Mulga Bill on the Ironbark Trend

  • ➢ Eight new high priority tenements include 7km of strike south of Mulga Bill and an additional 3.8km south of the Ironbark Trend

  • ➢ GBR now controls more than 35km of contiguous strike over the Side Well Gold Project

  • ➢ AC drilling will commence on new targets at Side Well South in the coming week

  • ➢ RC results from resource drilling at Mulga Bill are expected shortly

Great Boulder Resources (“ Great Boulder ” or the “ Company ”) (ASX: GBR ) is pleased to announce the acquisition of a group of priority tenements at the Company’s flagship Side Well Gold Project (“ Side Well ”) near Meekatharra in Western Australia.

Great Boulder’s Managing Director, Andrew Paterson commented:

“This is a great acquisition for Great Boulder, giving us another 3.8km of strike immediately south of our new targets at Side Well South. In addition we now have the tenement directly along strike from Mulga Bill. This acquisition gives GBR more than 35km of contiguous tenure over the eastern half of the Meekatharra greenstone belt, with excellent potential to continue making new discoveries as we grow towards our million-ounce gold target.”

“GBR’s team has done a great job identifying targets at Side Well South. As soon as we saw the potential there we were keen to lock down additional tenure along strike from those anomalies.”

“We’ll start the first drilling on our biggest target at Side Well South in the next few days as we continue to balance new discovery opportunities with resource definition drilling, working towards the resource update at the end of the year.”

Great Boulder has acquired an 80% interest in seven Prospecting Licences and one Exploration Licence from Mark Selga and Wanbanna Pty Ltd. Consideration for the acquisition is $80,000 plus $80,000 in GBR shares valued at a 5-day VWAP. The tenements will be operated as a joint venture on the same terms and conditions as those tenements acquired from Wanbanna in August 2023.

Six of the prospecting licences are immediately south of the Side Well South project area, covering the highly prospective mafic-ultramafic sequence which hosts the 18km-long Ironbark Corridor to the north. This area has been subject to small-scale prospecting for many years, mainly limited to

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement 24 SEPTEMBER 2024

2

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surface detecting and scraping for alluvial gold. There are several small historic shafts in the area. Previous drilling within the tenements has mainly been shallow RAB or vacuum drilling, with a small number of AC and RC holes. With limited contemporary records available, further validation of the data is required to establish which holes can be used for reporting to JORC 2012 standards.

E51/1679 sits over the central part of the Meekatharra greenstone belt south of Mulga Bill in the same volcaniclastic sequence directly along strike from the Flagpole prospect. E51/1679 and P51/3239 were explored by SensOre Ltd as part of their Tea Well Project, with AC and RC drilling completed in 2021 and 2022 as well as one deep diamond hole, testing for a DPT[®] target within the project area. Collar details and maximum down-hole gold and pathfinder assays for SensOre’s drilling are listed in Table 2 below.

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FIGURE 1: SIDE WELL GOLD PROJECT SHOWING THE NEW TENEMENTS

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

3

24 SEPTEMBER 2024

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GBR’s exploration will attempt to capitalise on the Company’s experience of exploring in this terrain by using AC drilling to test for continuations of the intrusive-related pathfinder elements characteristic of the 568,000oz Au Mulga Bill deposit.

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FIGURE 2: THE NEW AREAS COVER THE SOUTHERN CONTINUATION OF THE IRONBARK CORRIDOR AS WELL AS THE MULGA BILL TO FLAGPOLE TREND.

Next Steps

The RC rig is currently drilling extensional holes within the Mulga Bill resource area. Once this work is completed a first-pass AC program will commence at Side Well South, testing the two large geochemical anomalies recently identified with auger sampling.

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

4

24 SEPTEMBER 2024

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FIGURE 3: THIS AREA WAS PREVIOUSLY EXPLORED BY SENSORE LTD AS THEIR TEA WELL PROJECT

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  • FIGURE 4: THE SOUTHERN TENEMENTS COVER THE SOUTHERN CONTINUATION OF HIGH-PRIORITY DRILL TARGETS AT SIDE WELL SOUTH.

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

5

24 SEPTEMBER 2024

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This announcement has been approved by the Great Boulder Board.

For further information contact:

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Andrew Paterson Media Managing Director Lucas Robinson Great Boulder Resources Limited Corporate Storytime [email protected] +61 408 228 889 www.greatboulder.com.au [email protected]

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Follow GBR on LinkedIn

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Follow GBR on Twitter

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FIGURE 5: GBR’S MEEKATHARRA PROJECTS

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

ASX Announcement 24 SEPTEMBER 2024

6

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Competent Person’s Statement

Exploration information in this Announcement is based upon work undertaken by Mr Andrew Paterson who is a Member of the Australasian Institute of Geoscientists (AIG). Mr Paterson has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a ‘Competent Person’ as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ (JORC Code). Mr Paterson is an employee of Great Boulder Resources and consents to the inclusion in the report of the matters based on their information in the form and context in which it appears.

The information that relates to Mineral Resources was first reported by the Company in its announcement to the ASX on 16 November 2023. The Company is not aware of any new information or data that materially affects the information included in this announcement and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not material changed. The Company confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.

TABLE 1: SIDE WELL MINERAL RESOURCE SUMMARY, NOVEMBER 2023

Indicated Indicated Indicated Inferred Inferred Inferred Total
Deposit Type Cut-off Tonnes
(kt)		 Au
(g/t)		 Ounces Tonnes
(kt)		 Au
(g/t)		 Ounces Tonnes
(kt)		 Au
(g/t)		 Ounces
Mulga Bill Open Pit
U/ground		 0.5
1.0		 1,667
733		 3.1
3.5		 169,000
83,000		 2,982
1,130		 1.9
3.6		 183,000
132,000		 4,649
1,863		 2.4
3.6		 352,000
216,000
Subtotal 2,399 3.3 252,000 4,112 2.4 316,000 6,511 2.7 568,000
Ironbark Open Pit
U/ground		 0.5
1.0		 753
0		 3.7
0.0		 88,000
0		 186
0		 1.9
0.0		 11,000
0		 938
0		 3.3
0.0		 100,000
0
Subtotal 753 3.7 88,000 186 1.9 11,000 938 3.3 100,000
Total 3,152 3.4 340,000 4,298 2.4 327,000 7,450 2.8 668,000

Subtotals are rounded for reporting purposes. Rounding errors may occur.

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

7

24 SEPTEMBER 2024

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ABOUT GREAT BOULDER RESOURCES

Great Boulder is a mineral exploration company with a portfolio of highly prospective gold and base metals assets in Western Australia ranging from greenfields through to advanced exploration. The Company’s core focus is the Side Well Gold Project at Meekatharra in the Murchison gold field, where exploration has defined a Mineral Resource of 7.45Mt @ 2.8g/t Au for 668,000oz Au. The Company is also progressing early-stage exploration at Wellington Base Metal Project located in an emerging MVT province. With a portfolio of highly prospective assets plus the backing of a strong technical team, the Company is well positioned for future success.

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CAPITAL STRUCTURE

606M ~$2.9M

SHARES ON ISSUE ASX:GBR

SHARES ON ISSUE CASH ASX:GBR As at 30/06/24 $30M Nil

MARKET CAP DEBT At $0.05/sh As at 31/3/2024

$1.0M LISTED INVESTMENT Cosmo Metals (ASX:CMO) 64.5M UNLISTED OPTIONS

$50k DAILY LIQUIDITY Average 30-day value traded

~34% TOP 20 OWNERSHIP

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Exploring WA Gold & Base Metal assets, located in proximity to operating mines & infrastructure

Developing a significant high grade, large scale gold system at Side Well

Technically focused exploration team with a strong track record of discovery

Undertaking smart, innovative & systematic exploration

Ongoing drilling at multiple projects providing consistent, material newsflow

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

ASX Announcement

8

24 SEPTEMBER 2024

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TABLE 2: SIGNIFICANT INTERSECTIONS

Hole ID
Hole
Type
Northing
Easting
RL
Depth
Dip
Azi		 Max Au
(ppm)
Max As
(ppm)
Max Bi
(ppm)
Max Cu
(ppm)
Max Mo
(ppm)
Max Sb
(ppm)
Max W
(ppm)
21TWDD001DD
7052518 655130
541
501.5 -60
90		 0.038
1.4
0.08
100
0.8
1
1
21TWRC006RC
7052516 655199
538
62
-60
90		 0.176
0.8
0.02
84
2.8
1.7
2.5
21TWAC016AC
7049645 657194
506
102
-60
90		 0.045
22.4
0.02
60
3
6.8
1.5
21TWAC017AC
7049651 657122
507
73
-60
90		 0.221
49
0.04
50
0.6
4.9
-0.5
21TWAC018AC
7049644 657039
507
53
-60
90		 0.01
16.2
0.04
90
1
1.6
1.5
21TWAC019AC
7049645 656944
508
55
-60
90		 0.007
45.6
0.02
24
1.4
3.7
5
21TWAC020AC
7049651 656886
507
64
-60
90		 0.008
101
0.04
78
1
4.5
2
21TWAC021AC
7049645 656807
509
26
-60
90		 0.005
1.4
0.04
42
0.2
0.3
-0.5
21TWAC022AC
7049649 656720
511
41
-60
90		 0.015
2.6
-0.02
68
1.2
0.4
-0.5
21TWAC023AC
7049642 656640
513
18
-60
90		 0.005
2.4
0.02
44
1.2
0.3
-0.5
21TWAC024AC
7049641 656559
515
20
-60
90		 0.001
1.2
-0.02
30
3.2
0.2
9
21TWAC025AC
7049634 656482
516
29
-60
90		 0.006
4.8
0.16
58
3.6
0.6
4.5
21TWAC026AC
7049642 656392
517
59
-60
90		 0.105
29.4
0.96
126
3.2
6.8
2
21TWAC027AC
7049643 656317
517
27
-60
90		 0.008
1.8
-0.02
126
0.8
0.3
-0.5
21TWAC028AC
7049646 656236
515
46
-60
90		 0.008
6
0.32
88
0.8
0.5
1
21TWAC029AC
7049641 656158
514
80
-60
90		 0.024
9
0.04
66
1.4
0.6
1
21TWAC030AC
7049641 656081
513
54
-60
90		 0.008
6.8
-0.02
160
0.8
0.7
-0.5
21TWAC031AC
7048685 657036
502
43
-60
90		 0.022
12
0.04
28
0.8
0.9
0.5
21TWAC032AC
7048686 656953
505
40
-60
90		 0.012
7.2
0.08
20
0.4
0.7
1
21TWAC033AC
7048681 656877
506
51
-60
90		 0.024
13
0.04
48
0.8
2.1
0.5
21TWAC034AC
7048683 656798
507
53
-60
90		 0.026
11.6
0.06
28
0.4
2
1
21TWAC035AC
7048682 656716
508
52
-60
90		 0.023
11
0.3
24
1.2
3.2
2
21TWAC036AC
7048684 656633
506
47
-60
90		 0.014
19.8
0.04
64
0.6
3.2
2.5
21TWAC037AC
7048683 656557
506
43
-60
90		 0.016
0.8
0.02
68
-0.2
0.7
-0.5
21TWAC038AC
7048683 656476
506
47
-60
90		 0.008
4.6
0.02
144
1.2
0.6
1
21TWAC039AC
7048677 656398
506
50
-60
90		 0.007
1.6
0.06
46
1
0.4
1
21TWAC040AC
7048674 656319
505
37
-60
90		 0.006
3
0.06
46
1.2
0.6
0.5
21TWAC041AC
7048684 656239
506
50
-60
90		 0.041
4.2
0.08
42
2
0.5
1.5
21TWAC042AC
7052528 654470
519
10
-60 270		 0.002
0.4
0.02
46
1.2
0.2
-0.5
21TWAC043AC
7052528 654559
519
10
-60 270		 0.002
0.4
-0.02
44
0.6
0.2
-0.5
21TWAC044AC
7052520 654647
522
10
-60 270		 0.004
0.4
-0.02
46
-0.2
0.2
-0.5
21TWAC045AC
7052532 654717
522
10
-60 270		 0.007
0.4
-0.02
44
0.8
0.3
-0.5
21TWAC046AC
7052531 654800
526
10
-60 270		 0.004
0.4
-0.02
44
1
0.2
-0.5
21TWAC047AC
7052517 654882
534
10
-60 270		 0.001
0.4
-0.02
38
1
0.2
0.5
21TWAC048AC
7052524 654959
543
10
-60 270		 0.005
0.4
-0.02
46
0.4
0.2
-0.5
21TWAC049AC
7052534 655039
545
10
-60 270		 0.004
0.8
0.02
96
1
0.3
-0.5
21TWAC050AC
7052523 655116
541
10
-60 270		 0.006
0.4
-0.02
80
1.4
0.5
1
21TWAC051AC
7052516 655197
538
10
-60 270		 0.004
2.2
-0.02
50
0.4
0.2
-0.5
21TWAC052AC
7052516 655281
534
10
-60 270		 0.002
0.4
-0.02
44
1.8
0.5
1

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

ASX Announcement

9

24 SEPTEMBER 2024

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Hole ID
Hole
Type
Northing
Easting
RL
Depth
Dip
Azi		 Max Au
(ppm)
Max As
(ppm)
Max Bi
(ppm)
Max Cu
(ppm)
Max Mo
(ppm)
Max Sb
(ppm)
Max W
(ppm)
21TWAC053AC
7052524 655357
533
10
-60 270		 0.008
5.6
0.22
280
2
1.4
1
21TWAC054AC
7052520 655433
529
10
-60 270		 0.002
1
0.02
88
2.6
0.6
2.5
21TWAC055AC
7052538 655523
526
13
-60 270		 0.004
1
-0.02
72
1
0.5
-0.5
21TWAC056AC
7052571 655593
526
10
-60 270		 0.006
1.2
-0.02
98
1.8
0.8
0.5
21TWAC057AC
7052573 655681
525
10
-60 270		 0.006
0.8
-0.02
56
0.4
0.3
-0.5
22TWAC094AC
7056948 657343
516
53
-60 270		 0.004
2.4
1.48
40
3
1.5
1.5
22TWAC095AC
7056938 657422
516
59
-60 270		 0.013
1.8
0.1
128
2
1.6
1.5
22TWAC096AC
7056936 657508
515
77
-60 270		 0.058
4.2
0.76
286
4.8
2.1
2
22TWAC097AC
7056938 657581
517
68
-60 270		 0.011
1.4
0.1
46
4.6
1.3
3
22TWAC098AC
7056193 656942
516
76
-60 270		 0.005
7
0.02
44
1
0.6
1
22TWAC099AC
7056184 657028
515
81
-60 270		 0.001
3
0.02
40
1
0.4
1
22TWAC100AC
7056182 657101
515
86
-60 270		 0.002
2.2
0.08
30
1.8
0.3
0.5
22TWAC101AC
7056183 657181
514
123
-60 270		 0.024
22TWAC102AC
7056164 657260
515
139
-60 270		 0.007
1.4
-0.02
44
1.2
0.5
1.5
22TWAC103AC
7056174 657341
516
182
-60 270		 0.046
1.2
0.06
62
0.8
0.4
3.5
22TWAC104AC
7056170 657421
517
80
-60 270		 0.004
22TWAC105AC
7056171 657504
517
65
-60 270		 0.005
0.8
0.42
32
2.2
0.4
2
22TWAC106AC
7054722 657637
516
71
-60 270		 0.004
57.8
-0.02
26
0.4
1.2
0.5
22TWAC107AC
7054725 657709
517
84
-60 270		 0.004
22TWAC108AC
7054722 657789
517
87
-60 270		 0.016
5.2
0.06
82
2
1.1
1300
22TWAC109AC
7054715 657875
519
80
-60 270		 0.004
1.8
0.06
64
1
0.7
2
22TWAC110AC
7054717 657954
516
72
-60 270		 0.009
3
-0.02
66
0.8
0.9
-0.5
22TWAC111AC
7054710 658041
518
55
-60 270		 0.007
6.8
0.02
84
0.4
0.7
-0.5
22TWAC112AC
7054709 658118
520
78
-60 270		 0.008
3.8
0.02
86
0.6
0.9
1
22TWAC113AC
7054704 658193
517
88
-60 270		 0.004
2
0.02
56
1.2
0.8
0.5
22TWAC114AC
7054705 658275
519
68
-60 270		 0.003
1
-0.02
74
1
0.6
-0.5
22TWAC115AC
7054699 658356
518
74
-60 270		 0.003
3.4
0.04
78
1.2
0.7
1
22TWAC116AC
7054695 658435
519
93
-60 270		 0.05
1.8
0.04
44
3
1.2
0.5
22TWAC117AC
7054686 658597
520
126
-60 270		 -0.01
3.4
0.18
94
4
0.6
1.5
22TWAC118AC
7054682 658672
518
99
-60 270		 0.06
1.2
0.1
26
1
0.5
1
22TWAC119AC
7054682 658753
519
87
-60 270		 -0.01
1.4
0.04
38
1
0.4
0.5
22TWAC120AC
7054673 658833
520
47
-60 270		 -0.01
2
0.04
50
0.8
0.4
1
22TWAC121AC
7054670 658914
522
123
-60 270		 -0.01
1.8
0.04
54
1.8
1.1
5.5
22TWAC122AC
7054668 658992
522
49
-60 270		 0.04
4.2
0.08
46
1.8
1
1.5
22TWAC123AC
7054665 659074
522
75
-60 270		 -0.01
3.2
0.06
56
1
0.6
0.5
22TWAC124AC
7054664 659152
522
88
-60 270		 -0.01
1.2
-0.02
60
0.8
0.5
2.5
22TWAC125AC
7054659 659229
525
69
-60 270		 -0.01
2.8
0.04
42
0.6
0.4
-0.5
22TWAC126AC
7053564 657027
521
92
-60 270		 -0.01
9.6
0.02
44
0.8
1.2
1
22TWAC127AC
7053556 657104
518
84
-60 270		 -0.01
2.6
-0.02
38
1.6
1.2
1
22TWAC128AC
7053549 657179
519
104
-60 270		 -0.01
3.8
0.04
44
0.6
1.4
1

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

ASX Announcement

10

24 SEPTEMBER 2024

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Hole ID
Hole
Type
Northing
Easting
RL
Depth
Dip
Azi		 Max Au
(ppm)
Max As
(ppm)
Max Bi
(ppm)
Max Cu
(ppm)
Max Mo
(ppm)
Max Sb
(ppm)
Max W
(ppm)
22TWAC129AC
7053547 657266
518
105
-60 270		 -0.01
13.2
0.08
88
1
4
1
22TWAC130AC
7053544 657339
516
110
-60 270		 -0.01
6.6
-0.02
24
1
2.2
3.5
22TWAC131AC
7053534 657426
515
129
-60 270		 -0.01
3.8
0.02
30
1.6
0.8
0.5
22TWAC132AC
7053537 657504
519
123
-60 270		 0.08
17.6
0.18
58
2.6
1
1
22TWAC133AC
7053533 657581
517
115
-60 270		 -0.01
6.6
0.06
34
1.6
1.9
1
22TWAC134AC
7053525 657664
517
129
-60 270		 0.06
8.2
0.04
14
1
1.2
1
22TWAC135AC
7053518 657740
517
91
-60 270		 0.02
19.2
0.04
20
1.8
0.9
1
22TWAC136AC
7053514 657823
517
61
-60 270		 -0.01
101
0.02
28
1.2
0.7
5
22TWAC137AC
7053516 657909
516
55
-60 270		 -0.01
8.6
0.04
94
1.6
0.4
1
22TWAC138AC
7053512 657978
516
81
-60 270		 -0.01
7.8
-0.02
50
0.6
1.2
1.5
22TWAC139AC
7053514 658060
515
90
-60 270		 -0.01
12
0.04
44
0.8
0.9
1
22TWAC140AC
7053505 658137
518
82
-60 270		 -0.01
1.6
0.04
58
1.4
0.4
1
22TWAC141AC
7053505 658223
515
72
-60 270		 -0.01
2.2
0.02
56
1.4
0.2
1.5
22TWAC142AC
7053504 658303
518
87
-60 270		 0.02
2.6
0.06
76
1.6
0.5
0.5
22TWAC143AC
7053496 658379
517
89
-60 270		 0.03
1.6
0.06
24
1.4
1.1
1.5
22TWAC144AC
7053499 658462
517
65
-60 270		 -0.01
1
0.1
58
1.2
0.5
1
22TWAC145AC
7053492 658537
517
71
-60 270		 -0.01
0.8
0.04
40
1.6
0.6
1
22TWAC146AC
7053481 658624
518
95
-60 270		 0.01
2.2
0.04
22
1.4
0.4
0.5
22TWAC147AC
7053483 658700
518
78
-60 270		 -0.01
0.8
0.12
160
1
0.6
6.5
22TWAC148AC
7053475 658782
519
86
-60 270		 -0.01
2
0.02
40
1
0.2
1
22TWAC149AC
7053470 658858
519
99
-60 270		 -0.01
2.2
0.06
42
1.4
0.5
0.5
22TWAC150AC
7053465 658942
520
96
-60 270		 -0.01
2.8
0.04
38
1.4
1
0.5
22TWAC151AC
7053461 659022
516
101
-60 270		 -0.01
2.6
0.64
68
2
1.2
1.5
22TWAC152AC
7053460 659102
518
87
-60 270		 -0.01
1.8
-0.02
46
0.8
0.5
0.5
22TWAC153AC
7053453 659185
517
89
-60 270		 -0.01
1.6
0.26
110
1.2
0.4
1.5
22TWAC154AC
7052203 658171
513
133
-60 270		 -0.01
8.4
0.46
100
2.4
0.8
3
22TWAC155AC
7052198 658242
512
127
-60 270		 -0.01
1.6
0.02
92
4
2
1.5
22TWAC156AC
7052198 658318
512
129
-60 270		 0.02
1.8
0.1
132
0.6
1.2
1.5
22TWAC157AC
7052201 658401
512
65
-60 270		 -0.01
2.6
0.06
64
1.6
0.9
1.5
22TWAC158AC
7052200 658486
512
51
-60 270		 -0.01
1.2
0.06
46
1
0.4
0.5
22TWAC159AC
7052198 658559
514
85
-60 270		 -0.01
1.2
0.06
46
0.8
0.6
1
22TWAC160AC
7052203 658642
513
92
-60 270		 -0.01
1
0.16
96
1
0.5
2
22TWAC161AC
7052201 658722
512
63
-60 270		 0.03
0.6
0.04
72
1.2
0.4
1
22TWAC162AC
7052198 658794
512
62
-60 270		 -0.01
1.2
0.04
52
0.8
0.2
1
22TWAC163AC
7052206 658887
514
81
-60 270		 -0.01
2.2
0.28
54
0.8
0.5
1.5
22TWAC164AC
7052200 658959
514
71
-60 270		 0.01
4
0.06
58
0.8
0.6
0.5
22TWAC165AC
7052203 659038
515
122
-60 270		 0.44
1.6
0.02
110
1
1
0.5
22TWAC166AC
7054692 658514
519
89
-60 270		 -0.01
1.8
0.02
76
2.6
0.6
1.5
22TWAC167AC
7056164 657581
516
51
-60 270		 0.01
3
0.02
24
0.2
0.3
-0.5

Note: Collar coordinates are in GDA94 Zone 50 projection. As there are no significant intersections using GBR’s usual grade filters, the maximum values of a range of pathfinder elements are shown.

E: [email protected] GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

11

24 SEPTEMBER 2024

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Appendix 1 - JORC Code, 2012 Edition Table 1 (Side Well Project)

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections.)

Criteria Commentary
Sampling techniques The SensOre data displayed in the body of this announcement consists of AC and RC drilling, and one
diamond hole.
RC samples were collected into calico bags over 1m intervals using a cyclone splitter. The residual
bulk samples are placed in lines of piles on the ground. 2 cone splits are taken off the rig splitter for
RC drilling. Visually prospective zones were sampled over 1m intervals and sent for analysis while the
rest of the hole was composited over 4m intervals by taking a scoop sample from each 1m bag.
Core samples are selected visually based on observations of alteration and mineralisation and
sampled to contacts or metre intervals as appropriate. Once samples are marked the core is cut in
half longitudinally with one half taken for assay and the other half returned to the core tray.
AC samples were placed in piles on the ground with 4m composite samples taken using a scoop.
Drilling techniques Industry standard drilling methods and equipment were utilised.
Drill sample recovery Sample recovery data is noted in geological comments as part of the logging process. Sample
condition has been logged for every geological interval as part of the logging process. Water was
encountered during drilling resulting in minor wet and moist samples with the majority being dry.
No quantitative twinned drilling analysis has been undertaken.
Logging Geological logging of drilling followed established company procedures. Qualitative logging of
samples includes lithology, mineralogy, alteration, veining and weathering. Abundant geological
comments supplement logged intervals.
Sub-sampling techniques
and sample preparation		 1m cyclone splits and 4m speared composite samples were taken in the field. Samples were
prepared and analysed at laboratories in Perth. Samples were pulverized so that each samples had
a nominal 85% passing 75 microns. Au analysis was undertaken using Au-AA26 involving a 50g lead
collection fire assay and Atomic Adsorption Spectrometry (AAS) finish.
Multi-element analysis was completed. Digestion was completed using both 4 Acid and Aqua-regia
and analysed by ICP-AES and ICP-MS.
Quality of assay data
and laboratory tests		 All samples were assayed by industry standard techniques. Fire assay for gold; four-acid digest and
aqua regia for multi-element analysis.
Verification of sampling
and assaying		 Analysis of ME was typically done on master pulps after standard gold analysis with a company multi-
element standard inserted every 50 samples. No QAQC problems were identified in the results. No
twinned drilling has been undertaken.
Location of data points Sample locations and mapping observations were located and recorded electronically using a
handheld GPS. Coordinates were recorded in GDA94 grid in Zone 50, which is the GDA94 zone for
the Meekatharra area.
Drill holes were positioned using the same technique. Hole collars were initially picked up after
drilling using a handheld GPS. RC and Diamond hole collars were subsequently surveyed with a DGPS
for greater accuracy.
This accuracy is sufficient for the intended purpose of the data.
Data spacing and
distribution		 The spacing and location of the majority of drilling in the projects is, by the nature of early
exploration, variable.
The spacing and location of data is currently only being considered for exploration purposes.
Orientation of data in
relation to geological
structure		 Drilling is dominantly perpendicular to regional geological trends where interpreted and practical.
Wherever possible, cross sections are shown to give a visual indication of the relationship between
intersection width and lode thickness.
The spacing and location of the data is currently only being considered for exploration purposes.

ASX Code: GBR Contact: Andrew Paterson, Managing Director E: [email protected] P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005 ABN 70 611 695 955

GREATBOULDER.COM.AU

ASX Announcement

12

24 SEPTEMBER 2024

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Sample security SensOre personnel were responsible for delivery of samples from the drill site to the Toll Ipec
dispatch centre in Meekatharra. Samples are transported by Toll Ipec from Meekatharra to the
laboratories in Perth.
Audits or reviews Data review and interpretation by independent consultants on a regular basis.

Section 2 Reporting of Exploration Results

(Criteria listed in the preceding section also apply to this section.)

Criteria Commentary
Mineral tenement and
land tenure status		 Side Well tenement E51/1905 is a 48-block exploration license covering an area of 131.8km2
immediately east and northeast of Meekatharra in the Murchison province. The tenement is a 75:25
joint venture between Great Boulder and Zebina Minerals Pty Ltd.
Exploration done by
other parties		 Tenement E51/1905 has a protracted exploration history but is relatively unexplored compared to
other regions surrounding Meekathara.
The tenements south of E51/1905 have mainly been held by prospectors for many years, with field
work limited to metal detecting, pushing and scraping for alluvial gold. Some AC drilling has been
completed in recent years but GBR has not yet validated the data to JORC standards.
SensOre Ltd held a joint venture with Wanbanna Pty Ltd from 2020 to 2023 during which they
explored the Tea Well project for gold mineralisation looking for a large target generated using their
DPT program. SensOre completed a ground gravity survey in collaboration with GBR followed by an
AC drilling program followed upwith a limited RC and DD campaign.
Geology The Side Well tenement group covers a portion of the Meekatharra-Wydgee Greenstone Belt north
of Meekatharra, WA. The north-northeasterly-trending Archaean Meekatharra-Wydgee Greenstone
Belt, comprises a succession of metamorphosed mafic to ultramafic and felsic and sedimentary rocks
belonging to the Luke Creek and Mount Farmer Groups.
Over the northern extensions of the belt, sediments belonging to the Proterozoic Yerrida Basin
unconformably overlie Archaean granite-greenstone terrain. Structurally, the belt takes the form of
a syncline known as the Polelle syncline. Younger Archaean granitoids have intrusive contacts with
the greenstone succession and have intersected several zones particularly in the Side Well area.
Within the Side Well tenement group, a largely concealed portion of the north-north-easterly
trending Greenstone Belt is defined, on the basis of drilling and airborne magnetic data, to underlie
the area. The greenstone succession is interpreted to be tightly folded into a south plunging syncline
and is cut by easterly trending Proterozoic dolerite dykes.
There is little to no rock exposure at the Side Well prospect. This area is covered by alluvium and
lacustrine clays, commonly up to 60 metres thick.
Drill hole Information A list of the drill hole coordinates, orientations and intersections reported in this announcement are
provided as an appended table in the relevant announcements for each drilling program.
Data aggregation
methods		 Results were reported using cut-off levels relevant to the sample type. For composited samples
significant intercepts were reported for grades greater than 0.1g/t Au with a maximum dilution of
4m. For single metre splits, significant intercepts were reported for grades greater than 0.5g/t Au
with a maximum dilution of 3m.
A weighted average calculation may be used to allow for bottom of hole composites that were less
than the standard 4m and when intervals contain composited samples plus 1m split samples.
No metal equivalents are used.
Relationship between
mineralisation widths
and intercept lengths		 The majority of drilling was conducted using appropriate perpendicular orientations for interpreted
mineralisation. Stratigraphy appears to be steeply dipping to the west however mineralisation may
have a different orientation. Cross sections are shown wherever possible to illustrate relationships
between drilling and interpreted mineralisation.
Diagrams Refer to figures in announcement.
Balanced reporting It is not practical to report all historical exploration results from the Side Well project. Selected
historical intercepts havepreviouslybeen re-reported byGBR to highlight theprospectivityof the

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

ASX Announcement

13

24 SEPTEMBER 2024

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region, however the vast majority of work on the project has been completed by GBR and reported
in ASX announcements since 14 July 2020.
Other substantive
exploration data		 Subsequent to Doray Minerals Limited exiting the project in 2015, private companies have held the
ground with no significant work being undertaken.
Further work Further work is discussed in the document.

E: [email protected] ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

GREATBOULDER.COM.AU

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