Great Boulder Resources Ltd · ASX:GBR
Great Boulder Resources — Noosa Mining Conference 2025
19 slides from Great Boulder Resources's conference presentation, Jul 23, 2025
Slide 1: A Multi-Million Ounce Gold Hub in Western Australia
For personal use only A MULTI-MILLION OUNCE GOLD HUB IN WESTERN AUSTRALIA Side Well Gold Project July 2025 | ASX:GBR GREATBOULDER.COM.AU
Slide 2: Meekatharra Gold Hub
MEEKATHARRA GOLD HUB A high-grade, stand-alone mining opportunity in the Murchison ▪ Actively focused on advancing the Side Well Gold Project ▪ Large, under-explored project area with a strong pipeline of advanced For personal use only and growth targets ▪ The Ironbark deposit on its own has a highe
Slide 3: Corporate Overview
CORPORATE OVERVIEW Capital Structure Board & Management For personal use only Post Tranche 2 Placement – general meeting to approve 13/8/2025 Andrew Paterson Greg Hall 965.7M ~$59M Managing Director Non-executive Chairman • 45+ years in mining and exploration • 30+ years in mining, exploration SHARE
Slide 4: A Rapidly Growing Gold Project
A RAPIDLY GROWING GOLD PROJECT Advancing and developing the Side Well Gold Project, For personal use only located in proximity to production infrastructure A very large gold system with 668,000 oz @ 2.8g/t in resource1, including a high-grade core of 496,000 oz @ 5.3g/t Centrally located in the Murc
Slide 5: Side Well Gold Project
SIDE WELL GOLD PROJECT A rapidly growing, large-scale gold system ▪ There are two main corridors of prospective gold targets For personal use only within Side Well: ➢ The Central Corridor, a large, intrusive-related gold system which includes the Mulga Bill and Eaglehawk deposits; and ➢ The +22km Ea
Slide 6: Ironbark Deposit
IRONBARK DEPOSIT An early-stage mining opportunity ▪ Ironbark Scoping Study completed July 20251 For personal use only ▪ Production Target 1.26Mt @ 2.0g/t Au for 79,000oz Pre-Tax Gold Price Free Cashflow NPV ($M) IRR (AUD/oz) ($M) $ 4,500 121.9 100.4 109% $ 5,064 (Spot) 162.9 136.9 152% $ 5,500 194.
Slide 7: Side Well Gold Project: Central Corridor
For personal use only SIDE WELL GOLD PROJECT Central Corridor ASX:GBR | GREATBOULDER.COM.AU 7
Slide 8: Mulga Bill Deposit
MULGA BILL DEPOSIT High-grade gold mineralisation with massive growth potential ▪ Exceptional high-grade drilling results: For personal use only ▪ 6m @ 589.44g/t Au from 114m 1 ▪ 14m @ 36.12g/t Au from 91 2 ▪ 15m @ 35.82g/t Au from 88m 3 ▪ 8m @ 54.60g/t Au from 120m 4 ▪ Resource of 568koz @ 2.7g/t A
Slide 9: Mulga Bill to Eaglehawk
MULGA BILL TO EAGLEHAWK Projected long section shows the scale of this opportunity For personal use only Perth CBD skyline shown from King’s Park to East Perth for approximate scale comparison ASX:GBR | GREATBOULDER.COM.AU 9 Details of the Mulga Bill mineral resource estimate are included in GBR’s A
Slide 10: Eaglehawk Deposit
EAGLEHAWK DEPOSIT The northern extension of Mulga Bill: shallow, high-grade gold For personal use only ▪ Recent drilling has intersected similar high-grade veins as those seen at Mulga Bill1 ▪ Gold mineralisation defined over more than 900m of strike, completely open to the north ▪ High grade veins
Slide 11: Side Well Gold Project: Eastern Corridor
For personal use only SIDE WELL GOLD PROJECT Eastern Corridor ASX:GBR | GREATBOULDER.COM.AU 11
Slide 12: Eastern Corridor
ASX:GBR EASTERN CORRIDOR Multiple prospective targets spanning more than 22km of strike ▪ The 100koz Au Ironbark discovery resulted from auger sampling For personal use only along the eastern limb of the Polelle Syncline, equivalent to the Paddy’s Flat stratigraphy on the western limb ▪ How many mor
Slide 13: Ironbark Resource
IRONBARK RESOURCE Near-surface, high-grade resource ▪ Resource of 100,000oz @ 3.3g/t Au1 open to the south For personal use only ▪ High-Grade Drilling Results: ▪ 5m @ 51.65g/t Au from 106m2 ▪ 12m @ 10.24g/t Au from 120m3 ▪ 19.25m @ 5.22g/t Au from 121m4 ▪ Shallow, high-grade, tabular gold lodes at s
Slide 14: Saltbush Discovery
SALTBUSH DISCOVERY Eastern Corridor ▪ A geological analogue to Ironbark For personal use only ▪ Shallow, high-grade tabular gold lodes ▪ High-grade RC intersections include: ▪ 10m @ 6.47g/t Au from 117m1 ▪ 9m @ 5.2g/t Au from 15m2 ▪ 8m @ 7.59g/t Au from 12m3 ▪ 7m @ 4.10g/t Au from 141m4 ▪ Mineralisa
Slide 15: Eastern Corridor: Side Well South
ASX:GBR EASTERN CORRIDOR Side Well South For personal use only ▪ Recent discovery of new gold zones adjacent to the Golden Bracelet historic mine workings1 ▪ Gold now defined over +200m strike extent, open to the north and south ▪ Further AC and RC drilling is planned to bring this area into resourc
Slide 16: Eastern Corridor: Southern end, Tal Val
ASX:GBR EASTERN CORRIDOR Southern end: Tal Val For personal use only ▪ Recent auger sampling to the southern end of the project demonstrates continuity of mineralization ▪ Multiple new gold targets up to 1.8km long1 ▪ Heritage work and drill planning in progress 1: GBR ASX announcement 24 March 2025
Slide 17: Our Pathway to Development
SIDE WELL GOLD PROJECT Our pathway to development PROGRAMS COMMENCED NEXT STEPS For personal use only Project wide initial Flora and Fauna surveys ENVIRO Waste rock characterization, completed in 2024; hydrogeology study APPROVALS geotechnical drilling and underway detailed metallurgical test-work M
Slide 18: Important Information
IMPORTANT INFORMATION Purpose of presentation: This presentation has been prepared by Great Boulder Resources Limited (ACN 611 695 955) (GBR). It is intended for the sole purpose of providing high-level background information on GBR, its projects and its proposed operations. This presentation is not
Slide 19: Side Well Mineral Resource Estimate Updated – November 2023
SIDE WELL Mineral Resource Estimate Updated – November 2023 Mineral Resource Estimate incorporating all drilling to Sept 2023 For personal use only INDICATED INFERRED TOTAL Tonnes Au Tonnes Au Tonnes Au Deposit Ounces Ounces Ounces (kt) (g/t) (kt) (g/t) (kt) (g/t) Mulga Bill 2,399 3.3 252,000 4,112
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