Great Southern Copper Plc · LSE:GSCU
Great Southern Copper — Investor Presentation (March 2025)
25 slides from Great Southern Copper's investor presentation, March 2025
Slide 1: Corporate Presentation
LSE:GSCU Especularita lithocap FAST-TRACKING THE HIGH-GRADE MOSTAZA CU-AG DEPOSIT Corporate Presentation March 2025 1
Slide 2: Disclaimer
Disclaimer The information contained in these slides and the accompanying oral presentation (together, the "Presentation") have not been approved by an authorised person within the meaning of the Financial Services and Markets Act 2000 ("FSMA"). If any person is in any doubt as to the contents of th
Slide 3: Potential company-making drill intercept
Potential company-making drill intercept Key project metrics: • First hole CNG25DD001 at Mostaza mine intersects; ➢ 20m at 3.3% Cu and 270g/t Ag from 27m, ➢ Incl. 7m @ 5.72% Cu and 490g/t Ag from 31m Infrastructure High-grade Cu-Ag in place • Results up to 600% higher than historical drill grades •
Slide 4: GSC in Chile
GSC in Chile Aggressive low cost exploration strategy Large footprint projects in emerging copper district Drilling pipeline at Especularita beyond 2025 High grade Cu-Ag discovery at Mostaza Mine Porphyry Cu-Au / IOCG exploration upside Activity drives continuous newsflow High-grade cc-bo CNG25-DD00
Slide 5: Especularita: An emerging Cu district
Especularita: An emerging Cu district “GSC’s high-grade Cu-Ag discovery hole at Mostaza La Colorada confirms Especularita as an emerging copper district” GSC drill-ready lithocap prospects Development activity: Cerro • El Espino IOCG deposit - Pucobre announces mine development Negro ➢ 123 Mt @ 0.66
Slide 6: Cerro Negro Project – Mostaza Cu-Ag mine
Cerro Negro Project – Mostaza Cu-Ag mine • High grade Cu-Ag+Au 1. GSC sampling identifies • Historical mine with non-JORC high-grade Cu-Ag resource outcropping in base of old pit • Open in all directions • Historical drilling restricted to shallow holes beneath Mostaza mine • GSC drilling confirms h
Slide 7: Cerro Negro: Resource drilling at Mostaza
Cerro Negro: Resource drilling at Mostaza Key Objectives: 1. Increase Mostaza mine Cu-Ag-Au resource (in progress) 2. Target mineralisation along trend (in progress) DD001 –DD005 DD006 – DD009 3. Test porphyry Cu-Au at depth Work plan 2025-26: • 5,000m DD Mostaza • 5,000m scout RC • Metallurgy • Map
Slide 8: Cerro Negro – large-scale porphyry upside
Cerro Negro – large-scale porphyry upside Cerro Negro features suggest porphyry Cu model High sulphidation cc-bo in GSC drill core Oxide Cu at surface along trend from Mostaza 8
Slide 9: Especularita – Target / Scale / Location
Especularita – Target / Scale / Location Coquimbo Andacollo • Cu-Au mine Port Extensive under-explored lithocap 1.7 Bt Cu ➢ Porphyry Cu indicator > 75 km2 N • Piuquenes Abundant historical workings and mines Los Vilos El Espino Cu-Au project Port ➢ Cu-Au workings surround lithocap ➢ Lithocap “masks”
Slide 10: Especularita: Multi-target opportunity
Especularita: Multi-target opportunity IOCG Targets Porphyry Cu-Au Targets IRCG Targets Bechia La Colorada Amarilla lithocap Cerro Lipa Negro (Drill-ready) Los Alamos Victoria (Drill-ready) Lana Corina CPO • 454m of 0.79% Cu, 305ppm Mo Teresita Paclas (RC drilling) Los Rulos Viuda (RC drilling) El E
Slide 11: Especularita: Cu-Au-Ag Mega-trends
Especularita: Cu-Au-Ag Mega-trends N Los Andes Argentina Piuquenes (PM:TSX) S • Porphyry Cu-Au • 448m of 0.42% Cu, 0.46 g/t Au Antofagasta Cerro Negro • HS/Porphyry Cu-Ag-Au El Espino (PuCobre) • IOCG • 123Mt of 0.66% Cu, 0.24g/t Au Lipa (Lithocap) • Porphyry Cu-Au-Mo Teresita Granodiorite • IRGS Au
Slide 12: Especularita – Giant spectral anomaly
Especularita – Giant spectral anomaly Colorada • Landsat8 spectral survey highlights the “Colorada Lithocap zone lithocap” as a giant colour anomaly Cerro Negro • Coincident anomaly footprints for: ➢ Clay-sericite (yellow Landsat) – altered feldspar Lipa / ➢ Hematite (red Landsat) – oxidised sulphid
Slide 13: Advancing Cu-Au-Ag prospects through the discovery pipe-line
Advancing Cu-Au-Ag prospects through the discovery pipe-line Early Stage: Intermediate Stage: • Especularita Project • Cerro Negro Advanced Stage: • Lipa (PCD) • Aurelia (Skarn / IOCG) • Mostaza Mine • Rulos (IOCG) • Viuda (Porphyry) (HS/Porphyry) • Brechia Amaria • Victoria (IRGS) (PCD) • Teresita
Slide 14: Especularita: Drilling plan 2025-2026
Especularita: Drilling plan 2025-2026 Lana C’ Lipa / Victoria Anto plc Cerro Negro Teresita Viuda Aurelia / Rulos • Porphyry Cu • IRGS • HS Cu-Ag • HS Cu-Ag • IRGS • HS Cu-Au • Skarn Cu+Au • CPO:ASX • HS Cu-Au • Porphyry Cu • Porphyry Cu-Au • Porphyry Cu • Porphyry Cu-Au • 1,000m scout RC Victoria ✓
Slide 15: Value scale – the drilling effect
Value scale – the drilling effect Junior Copper Explorers in Sth America • Drilling has the potential to add real value Market Cap US$ m 90 • Sustained drilling leading to discovery and MC (USD), 82.27 80 The Lassonde Curve resource drilling adds exponential value 70 • Increased value attracts poten
Slide 16: Viuda – zoned porphyry system
Viuda – zoned porphyry system Chl-epi-mag N zone Chl-epi-mag Advanced argillic (silica-clay) zone AA Viuda Chico Clay-ser-Fe-ox Pyrite-albite-clay zone Chl-epi-mag Chl-epi-mag Landsat 8 Drone magnetics 16
Slide 17: Viuda porphyry target – scout RC drilling
Viuda porphyry target – scout RC drilling Bajo de Alumbrera, Argentina • Anulous of weathered clay-rich alteration about silica core creates typical “bowl” type topographic depression • Analogous in scale and type with Bajo de Alumbrera AA copper deposit in Argentina • Scout RC drilling completed to
Slide 18: San Lorenzo: Landsat lithocap anomalies
San Lorenzo: Landsat lithocap anomalies Productura Cu-Au deposit N (HCH) Reinvigorated exploration trend Cortadera due to success of Hot Chili, Cu-Mo deposit 25 km (HCH) Marimaca and Tribeca. Dos Amigos Cu-Mo mine Pajonales & (CEMIN) Previous GSC exploration Frontera Cu-Mo deposits confirms large la
Slide 19: Monti Li: The Lithium Triangle
Monti Li: The Lithium Triangle • Chile's largest producer in the region with the largest reserves • Investment in Li-brine exploration focused in Argentina • Regulations in Chile updated to increase production and improve environmental outcomes The Lithium Triangle SQM Albermarle Monti Li 19
Slide 20: Key Corporate Information – Mar 2025
Key Corporate Information – Mar 2025 Board Holdings and Major Shareholders (>3%) Company information Foreign Dimensions Pty 46.77%* Market Share Shares in Spreadex 3.25% Ticker Market Cap price issue Brokers Dr. Al-Qurtas 3.14% Lowell Resources Fund 3.01% GSCU LSE £22.58m 4.10p 550.6m Marex SI Capit
Slide 21: Board and Management
Board and Management Charles Bond: Chairman Nick Briers: Non-executive Director • Corporate finance lawyer with over 25 years of experience and has worked with • Over 25 years of experience in financial markets heading up Exchange Traded mining companies for the past 15 years Derivatives sales desks
Slide 22: 2025-26 Exploration Programme Proposal
2025-26 Exploration Programme Proposal Q1 Q2 Q3 Q4 ESPECULARITA PROJECT Especularita • Cerro Negro – fast-track resource drilling at Mostaza mine, plus Mostaza drilling metallurgy, geotech, base-line environmental and water studies • Cerro Negro – regional exploration including geophysics and RC Cer
Slide 23: Why Chile?
Why Chile? Chile is the Globally significant copper jurisdiction: MINISTRO HALES (CODELCO) Leading Copper Mines in Chile in 2020 • Largest producer and exporter of copper (by 1000 metric tonnes) CENTINELA* (ANTOFAGASTA MINERALS) • Largest reserves of copper and 4th largest for gold RADIOMIRO TOMIC (
Slide 24: Summary
Summary • Chile Largest producer and exporter of copper • Jurisdiction Tier 1 - Globally significant mining location • Copper and gold Strong market drivers • Drilling pipe-line Especularita Cu-Au: 6 drill-ready targets • 100% rights Leveraged for success • Infrastructure Well located near to roads,
Slide 25: Thank you
Thank you GSC’s 100% Chilean exploration team, Especularita project 25
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