Great Southern Mining Limited · ASX:GSN
Great Southern Mining — Read Corporate Webinar (July 2026)
15 slides from Great Southern Mining's conference presentation, Jul 8, 2026
Slide 1: Provincial Scale Gold Exploration
Provincial Scale Gold Exploration High Impact Drilling Underway Read Corporate Webinar Presentation July 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 QLD the country Queensland Edinburgh Park Joint Venture Diamond drilling in July by Gold Fields Ltd at Edinburgh Park NT QLD WA Photo: RC drilling at the Mon Ami Gold Project LAVERTON SA NSW Photo: 2025 Diamond drilling at Edinburgh Park Western
Slide 4: WA - Three Gold Priorities – Surrounded by Existing Mills and Infrastructure
WA - Three Gold Priorities – Surrounded by Existing Mills and Infrastructure Commanding 909km2 landholding in the Laverton District ➢ Strategically placed between Regis Resource +12Moz Duketon camp and Genesis Mining +6Moz Laverton tenure ➢ Multiple operating and planned gold processing facilities w
Slide 5: Golden Boulder Discovery
Golden Boulder Discovery Drilling Out 3.5km of Gold Mineralisation ➢ Golden Boulder sits on the N-W structural trend host to Rosemont (>2.5m oz), Baneygo (380koz), Ben Hur (390koz) and multiple others ➢ Over 50 historic workings with gold mineralisation from surface ➢ Defined three mineralised trend
Slide 6: Golden Boulder Discovery Huge Scale Potential
Golden Boulder Discovery Huge Scale Potential ➢ Drilling from July 2026 to follow up to highly successful 2025 program where nearly all drill lines intercepted >1 g/t gold ➢ Little to no drilling below 100m ➢ Still very sparsely drilled to the south ASX:GSN • July 2026 5
Slide 7: 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 depth below surface ➢ Located <12km from Regis Resources’ Garden Well
Slide 8: Amy Clarke Emerging Discovery Huge Scale Potential
Amy Clarke Emerging Discovery Huge Scale Potential ➢ Extensive strike with huge scale potential, but little drilling below 50m from surface ➢ Mineralisation remains open to the south where there has been no modern drilling (only shallow drilled in the 1990’s) ➢ Upcoming drilling program planned to s
Slide 9: Mon Ami Gold Project
Mon Ami Gold Project Extensional drilling in progress ➢ Located ~10km east of Granny Smith (Gold Fields) mill ➢ Existing 1.56Mt @ 1.11g/t Au for 55koz Mineral Resource1 ➢ Mineralisation remains open in multiple directions ➢ Near-term development potential with granted Mining License and heritage and
Slide 10: Mon Ami Gold Project – An Ida H Analogy
Mon Ami Gold Project – An Ida H Analogy ➢ GSN considers Mon Ami to be a potential analogue for the high-grade Ida H deposit (Owned by Genesis Minerals) ➢ Mon Ami and Ida H are just 7km apart on the prolific gold bearing Barnicoat Shear ➢ Ida H one of the highest-grade mines in the Laverton District
Slide 11: Edinburgh Park
Edinburgh Park Provincial Scale – Hunting for Giant Intrusive Related Gold Systems ASX:GSN • July 2026 10
Slide 12: Edinburgh Park: JV with Gold Fields Chasing Monster Gold Deposits
Edinburgh Park JV with Gold Fields Chasing Monster Gold Deposits ➢ Over 1,500km2 tenure - highly prospective for major gold- copper-silver mineral systems ➢ Targeting multi-million-ounce intrusive related giants ➢ Tenure accumulated over a decade, following Chairman, John Terpu’s Conquest Mining Lim
Slide 13: Mt Dillon: Potential for a concealed monster
Mt Dillon Potential for a concealed monster ➢ Mt Dillon target defined by a large-scale IP anomaly under a quartz lithocap1 ➢ Interpreted as a preserved porphyry or epithermal system ➢ Outcropping alteration is consistent with a high- sulphidation epithermal gold system ➢ Drilling commencing in July
Slide 14: Board of Directors and Corporate Snapshot
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 15: Contact Us
Contact Us Matthew Keane Managing Director E: admin@gsml.com.au T: 08 9240 4111 ASX:GSN ASX:GSN • July 2026 14
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