Great Southern Mining Limited · ASX:GSN
Great Southern Mining — 121 Mining Investment Conference (March 2026)
17 slides from Great Southern Mining's conference presentation, Mar 11, 2026
Slide 1: Provincial Scale Gold Exploration
Provincial Scale Gold Exploration ASX:GSN Prime Locations for >1Moz Gold Discoveries For personal use only ASX:GSN • March 2026 March 2026
Slide 2: Important Information
Important Information Deposit Competent Person Employer Professional Institute For personal use only 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 M
Slide 3: Corporate Snapshot
John Terpu CORPORATE SNAPSHOT Strong Shareholder Base Executive Chairman Other Over 30 years’ experience in the mining & Shareholders BOARD OF DIRECTORS exploration sector, through acquisition and 10% investment in many projects. Founder of Conquest Shares on issue 997M Top 20 (ex Mining which disco
Slide 4: Aggressive company making exploration on both sides of the country
QLD Aggressive company making exploration on both sides of the country Queensland Edinburgh Park Project For personal use only Diamond drilling underway by Gold Fields Ltd at Edinburgh Park NT QLD WA SA Photo: RC drilling at Duketon Gold Project NSW Western Australia Photo: Diamond drilling at Edinb
Slide 5: Advanced +900km2 Land Holding
Advanced +900km2 Land Holding Western Australia Exploration Projects For personal use only NT WA LAVERTON Duketon Gold Project SA KALGOORLIE East Laverton PERTH Gold - Nickel Mon Ami Gold ASX:GSN • March 2026 4
Slide 6: Duketon Gold Project - Prime Location for >1Moz Gold Discoveries
Duketon Gold Project - Prime Location for >1Moz Gold Discoveries ➢ Major gold camps in the Laverton District have average For personal use only spacing of 30 to 40km’s1 ➢ GSN tenure is between Regis Resources' +12Moz Duketon camp and Genesis Mining +6Moz Laverton tenure ➢ GSN has over 12 priority ta
Slide 7: Golden Boulder: Drilling Out 3.5km of Gold Mineralisation
Golden Boulder Drilling Out 3.5km of Gold Mineralisation ➢ Golden Boulder sits on the N-W structural trend host to Rosemont (>2.5m oz), Banyego (380koz), Ben Hur (390koz) and multiple others For personal use only ➢ ~3.5km of mineralised strike already identified, including +800m of semi- contiguous
Slide 8: Golden Boulder Huge Scale Potential
Golden Boulder Huge Scale Potential For personal use only ASX:GSN • March 2026 7
Slide 9: Amy Clarke +5km gold anomaly
Duketon Gold Amy Clarke +5km gold anomaly ➢ Recent drilling extended significant intercepts over a ~4.7km strike For personal use only ➢ Mineralisation remain undrilled and open to the south ➢ Located 8-10km from Regis Resources’ Garden Well processing facility ➢ Shallow aircore drilling by GSN in 2
Slide 10: Mon Ami Gold Project
Mon Ami Gold Project ➢ Located 10km <10km east of Granny Smith mill ➢ Established 1.56Mt @ 1.11g/t Au for 55koz Mineral Resource1 For personal use only ➢ Mineralisation remains open in multiple directions ➢ Near-term development potential with granted Mining License and heritage and environmental st
Slide 11: Diorite Hill PGE – A Wildcard in the Portfolio
Diorite Hill PGE Target Diorite Hill PGE – A Wildcard in the Portfolio ➢ Diorite Hill is a massive, 7,000m thick layered intrusive complex – prominent on regional aeromagnetic surveys ➢ Reprocessing of regional seismic and magnetic geophysics has defined several horizons considered prospective for P
Slide 12: Edinburgh Park – Provincial Scale – A Sleeping Giant of Australian Exploration
Edinburgh Park – Provincial Scale – A Sleeping Giant of Australian Exploration For personal use only ASX:GSN • March 2026 11
Slide 13: Edinburgh Park: Gold Fields Chasing Monster Gold Deposits
Edinburgh Park Gold Fields Chasing Monster Gold Deposits ➢ 1,750km2 tenure - highly prospective for major gold-copper-silver mineral For personal use only systems ➢ Over 20 porphyry and intrusive related gold targets identified by GSN ➢ Tenure accumulated over a decade, following Chairman, John Terp
Slide 14: Mt Dillon: Potential for a concealed monster
Mt Dillon Potential for a concealed monster ➢ Target defined by a large-scale IP anomaly under a quartz lithocap (Mt Dillon)1 For personal use only ➢ Interpreted as a preserved porphyry or epithermal system ➢ Abundant clay-pyrite-silica alteration surrounds the lithocap ➢ Outcropping alteration is c
Slide 15: Edinburgh Park: Exploration still in the early stages
Edinburgh Park Exploration still in the early stages ML2 Further targets emerging For personal use only Leichhardt Creek ➢ The success of the project will not be limited to the existing IP targets at Leichhardt Creek and Mt Dillon Mt Dillon ➢ A pipeline of targets is emerging from Edinburgh Castle M
Slide 16: High Impact Exploration: Active on Multiple Projects in 2026
High Impact Exploration Active on Multiple Projects in 2026 ➢ Most impactful time in Great Southern’s history For personal use only ➢ Golden Boulder discovery drill out - Late-2025 drilling returned further high grade – follow-up RC drilling from March 2026 ➢ Golden Boulder deep drilling – Co-funded
Slide 17: Contact Us
For personal use only Contact Us Matthew Keane Managing Director E: admin@gsml.com.au T: 08 9240 4111 ASX:GSN • March 2026 ASX:GSN
Great Southern Mining — 121 Mining Investment Conference (March 2026) on 6ix