Great Southern Mining Limited · ASX:GSN
Great Southern Mining — Investor Presentation (October 2026)
14 slides from Great Southern Mining's investor presentation, Oct 15, 2026
Slide 1: Delivering with the drill bit
Delivering with the drill bit High Impact Drilling in WA and QLD rsonal use only Read Corporate Webinar October 2026 ASX:GSN
Slide 2: Important Information
Important Information Deposit Competent Person Employer Professional Institute Duketon, East Laverton and Mon Ami Exploration Results and Geological Interpretation Matthew McCarthy Great Southern Mining Limited MAIG, FSEG Edinburgh Park Project Matthew McCarthy Great Southern Mining Limited MAIG, FS
Slide 3: Aggressive company making exploration on both sides of the country
Aggressive company making exploration on both sides of the country QLD Queensland rsonal use only Western Australia ~1,500km2 Edinburgh Park JV +900km2 Laverton tenure Diamond drilling underway by Major RC drill program Gold Fields Ltd at Mt Dillon commenced across 3 exciting gold targets TOWNSVILLE
Slide 4: 13,000m drilled since June 2026 – Momentum to continue
13,000m drilled since June 2026 – Momentum to continue Three priority targets are being tested: 1. Golden Boulder – Duketon Gold Project ▪ Testing a 3.5km mineralised trend rsonal use only ▪ Consistent high garde gold intercepts over the first 1.1km ▪ Assays pending for 3,425m ▪ Drilling ongoing 2.
Slide 5: Golden Boulder Discovery
Golden Boulder Discovery How big can this be? 3.5km mineralised strike ➢ Consistent high-grade intercepts over the northern 1.1km from drilling to date rsonal use only ➢ Only shallow drilled with most holes <150m below surface ➢ Better intercepts to date include1: ▪ 9m at 3.36 g/t Au from 127m, incl
Slide 6: rsonal use only
rsonal use only ASX:GSN • October 2026 5
Slide 7: Mon Ami Gold Project
Mon Ami Gold Project Extensional drilling shows growth opportunities ➢ Located ~12km east of Granny Smith (Gold Fields) processing facility ➢ Existing 1.56Mt @ 1.11g/t Au for 55koz Mineral Resource1 rsonal use only ➢ Near-term development potential with granted Mining License and many requisite mini
Slide 8: Mon Ami Gold Project – Resource Extension
Mon Ami Gold Project – Resource Extension Recent drilling has significantly extended mineralisation down-dip, down-plunge and to the north Open rsonal use only Open Figure 1. Recent drill intercepts showing extensions below the current JORC Resource. Ssection lines 6818710N (top) and 6819100N (botto
Slide 9: Amy Clarke Emerging Discovery
Amy Clarke Emerging Discovery Gold Mineralisation over a 4.7km strike ➢ 2025 drilling extended the mineralised gold trend to 4.7km, which remains open to the south ➢ Mineralisation from surface, but only drilled to an average 50m rsonal use only depth below surface ➢ Located <12km from Regis Resourc
Slide 10: Edinburgh Park
Edinburgh Park Provincial Scale – Hunting for Giant Intrusive Related Gold Systems rsonal use only ASX:GSN • October 2026 9
Slide 11: Edinburgh Park – JV with Gold Fields Chasing Monster Gold Deposits
Edinburgh Park JV with Gold Fields Chasing Monster Gold Deposits ➢ ~1,500km2 tenure - highly prospective for intrusive related mineral systems rsonal use only ➢ Targeting multi-million-ounce giants ➢ Tenure accumulated over a decade, following Chairman, John Terpu’s Conquest Mining Limited’s discove
Slide 12: Mt Dillon – Drilling completed, assays pending
Mt Dillon Drilling completed – Assays pending ➢ Maiden diamond drilling program completed at the Mt Dillon IRGS target ➢ Two holes drilled for 1,535m – both holes extended beyond planned depth ➢ Outcropping alteration is consistent with a high-sulphidation epithermal gold system rsonal use only ➢ Ma
Slide 13: Corporate Snapshot and Board of Directors
John Terpu BOARD OF DIRECTORS Executive Chairman CORPORATE SNAPSHOT Over 25 years’ experience in the mining & exploration sector, through acquisition and investment in many projects. Founder of Conquest Mining which STRONG SHAREHOLDER BASE discovered the Mt Carlton mine and went Shares on Issue1 1,1
Slide 14: Mon Ami Mineral Resource and Contact Us
rsonal use only The 2021 Mineral Resource estimate for the Mon Ami Gold Project is shown below. In relation to the Mineral Resource Statement, the Company confirms that all material assumptions and technical parameters that underpin the relevant market announcement continue to apply and have not mat
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