Great Southern Mining Limited · ASX:GSN
Great Southern Mining — Investor Presentation (September 2025)
17 slides from Great Southern Mining's investor presentation, Sep 25, 2025
Slide 1: Funded with multiple shots on goal
ASX:GSN For personal use only Funded with multiple shots on goal Drilling underway in both Queensland and Western Australia ASX:GSN • September 2025 September 2025
Slide 2: A busy year ahead with drilling underway on both sides of the country
A busy year ahead with drilling underway Queensland on both sides of the country Edinburgh Park Diamond drilling underway by Gold Fields Ltd at Edinburgh Park For personal use only NT QLD WA SA NSW Photo: Air Core drilling underway at Amy Clarke. Site visit September 2025 VIC Western Australia Duket
Slide 3: Important Information
Important Information For personal use only Deposit Competent Person Employer Professional Institute Duketon, East Laverton and Mon Ami Exploration Results and Geological Interpretation Rachel Backus Great Southern Mining Limited AIG, AUSIMM Edinburgh Park Project Rachel Backus Great Southern Mining
Slide 4: Investment Highlights
Queensland Investment Highlights Belt scale project in North Qld’s Copper-Gold District with >20Moz Edinburgh Park Gold Fields Ltd commenced an earn- For personal use only in for up to 75% Drilling underway in both Western Australia and Queensland NT Leveraged to exploration success & QLD a rising g
Slide 5: Advanced Western Australia Exploration Projects
Advanced Western Australia Exploration Projects For personal use only NT WA LAVERTON Duketon Gold SA KALGOORLIE East Laverton PERTH Gold - Nickel Mon Ami Gold ASX:GSN • September 2025 4
Slide 6: Gold Camp Spacing
Gold Camp Spacing Where is the next +1 Moz hub? 30 km For personal use only Major gold camps in the Eastern Goldfields have an average spacing +7Moz of 30-40 km* GSN’s tenements are located halfway between two major gold centres, spread ~75 km apart: GSN Tenure 1. Garden Well - Rosemont hub ??Moz 75
Slide 7: Duketon Gold Project
Duketon Gold Project Pipeline of Advanced to Early-Stage Prospects GSN has over 12 priority gold targets ranging from resource drill-out For personal use only stage to highly prospective early-stage targets ASX:GSN • September 2025 6
Slide 8: Southern Star Sale and Strategic Relationship with Regis
Southern Star Sale and Strategic Relationship with Regis Asset sale for up to A$9M For personal use only ML 38/1299 divested to Regis Resources (ASX:RRL) in July 2025 A$4M cash upfront – received July 2025 Up to A$3M at commencement of mining (scaled on gold price) A$2M upon the definition o
Slide 9: Golden Boulder Area – Emerging Discovery
Duketon Gold Golden Boulder Area – Emerging Discovery Shallow, high-grade results from drilling including: For personal use only 5 m at 14.57 g/t Au from 41 m, including 1 m at 70.94 g/t Au 2 m at 12.56 g/t Au from 99 m, including 1 m at 18.21 g/t Au 8 m at 1.77 g/t Au from 27 m, including 3 m
Slide 10: Amy Clarke +5km gold anomaly
Duketon Gold Amy Clarke +5km gold anomaly Over 5 km gold anomaly identified in shallow aircore drilling and soil For personal use only geochemistry Last major drilling campaign prior to GSN ownership was broad-spaced shallow vacuum and air core in 1994 Prospect is located 8 km from Regis Resou
Slide 11: Province Scale Edinburgh Park Project
Province Scale Edinburgh Park Project Queensland For personal use only Province-scale play Edinburgh Park Project ~1,750 km2 tenure Prospective for large-scale intrusive-related gold- copper-silver mineral systems Geophysics has defined several large-scale porphyry/epithermal targets TOWNSVILL
Slide 12: Edinburgh Park: Big land holding surrounded by intrusive related gold systems
Edinburgh Park Big land holding surrounded by intrusive related gold systems Over 20 target areas defined by GSN For personal use only ASX:GSN • September 2025 11
Slide 13: Edinburgh Park Drilling Underway: Leichhardt Creek Targets
Edinburgh Park Drilling Underway Leichhardt Creek Targets Large scale: 2.4 km of Induced Polarisation (IP) anomalies For personal use only Interpreted sulphide caps over deeper porphyry intrusions Overlain by gold and base metal anomalies at the surface Up to 10 g/t gold* in nearby rock chip
Slide 14: Edinburgh Park: Mt Dillon Target
Edinburgh Park Mt Dillon Target Upcoming target to be drilled Target defined by a large-scale IP anomaly under a quartz lithocap (Mt Dillon)* For personal use only Interpreted as a preserved porphyry or epithermal system Abundant clay-pyrite-silica alteration surrounds the lithocap Outcroppi
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 ongoing geophysica
Slide 16: Corporate Snapshot and Board of Directors
Corporate Shareholders John Terpu BOARD OF DIRECTORS Snapshot Executive Chairman Top 20 (excl. Directors Over 22 years’ experience in the mining & exploration Directors sector, through acquisition and investment in many and Gold Fields) 33% 25% projects. Founder of Conquest Mining which A$28.9m disc
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 • September 2025 ASX:GSN
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