Slide 1: Pampa Medina Exploration Update
S OUTH MEJILLONES AME R IC A PAMPA MEDINA ANTOFAGASTA SANTIAGO For personal use only MARIMACA COPPER CORP. C H IL E Pampa Medina Exploration Update Webinar – July 14, 2026 TSX: MARI ASX: MC2
Slide 2: Disclaimer
Disclaimer The following notices and disclaimers apply to this presentation and you are therefore advised to read this carefully before reading or making any other use of this presentation or any information contained in this presentation. This presentation is dated the 7th of July 2026 and has been
Slide 3: Disclaimer
Disclaimer Forward-looking statements and information (including Marimaca’s belief that it has a reasonable basis to expect it will be able to fund the costs of the Project for its estimated life of mine) are (further to the above) based on the reasonable assumptions, estimates, analysis and opinion
Slide 4: Disclaimer
Disclaimer The information in this presentation that relates to the Company's exploration results has been extracted from the Company's previous ASX and SEDAR announcement[s] including: ASX and SEDAR announcement[s] entitled “MOD Feasibility Study Confirms Robust Capital Intensity and 30%+ IRR” with
Slide 5: Introduction – Pampa Medina
For personal use only Introduction – Pampa Medina Nico Cookson President
Slide 6: Manto-Type and Sediment-hosted Copper Deposits Globally
Manto-Type and Sediment-hosted Copper Deposits Globally Geological learnings applied to Pampa Medina Kupferschiefer (Rudna-Lubin- Polkowice-Sieroszowice Mines)(1) Resource: 1,883Mt at 1.65% Cu For personal use only and 49.7g/t Ag 2025 Production: 401kt Cu African Copper Belt (Kamoa-Kakula Mines)(2)
Slide 7: Pampa Medina & Regional Exploration Update
For personal use only Pampa Medina & Regional Exploration Update Sergio Rivera VP, Exploration
Slide 8: Sierra Medina: Location Map
Sierra Medina: Location Map A new Cu-Ag mining district is emerging For personal use only Pampa Medina 8
Slide 9: Sierra Medina Stratigraphy & Structure
Sierra Medina Stratigraphy & Structure Approx. Thickness N Elenita La Negra Formation For personal use only > 300 m Pia Volcanics Antena Madrugador VOLC (Flows & Tuffs) Sierra Norte Rencoret Formation 1 Upper Sediments (Sandstones & Shales) R1 Dyke swarm system Pia Intrusives Rencoret Formation 200-
Slide 10: Sierra Medina: Property Map and Exploration Areas
Sierra Medina: Property Map and Exploration Areas 5km 5km For personal use only Antena Pampa Norte Pia Sierra Norte Pampa Medina Exploration Project (39,500 m RC-DDH Drilling) Madrugador Pampa Medina Madrugador Pampa Medina Oxide Madrugador Mine Historic Drilling: (PMO) 282 holes – 29,965 m Historic
Slide 11: Pampa Medina: Drilling to Date
Pampa Medina: Drilling to Date 1km For personal use only SMR-06 Open Open SMRD-26 SMRD-23 SMRD-21 SMRD-30 SMR-29 Open SMR-05 SMD-01 SWRD-09 SMRD-20 SMRD-18 SMRD-17 SMD-04 SPRD-06 SMR-10 SMR-11 SPRD-05 SPRD-01 SPRD-04 SMRD-14 SWRD-03 SWRD-01 SMRD-16 SMRD-12 SMRD-13 SMRD-15 SPRD-08B SPRD-07 SPRD-02 SP
Slide 12: Pampa Medina: Mineralization Delineation by Cu%
Pampa Medina: Mineralization Delineation by Cu% 3 km For personal use only Open Open 2 km >0.5% Cu Mineralization Open >0.3% Cu Mineralization >0.2% Cu Mineralization 150m reference grid 12
Slide 13: Pampa Medina: Mineralization Delineation by Cu%
Pampa Medina: Mineralization Delineation by Cu% 3 km For personal use only 2 km Interpreted WNW trending Late Fault & Dyke System >0.5% Cu Mineralization >0.3% Cu Mineralization >0.2% Cu Mineralization 150m reference grid 13
Slide 14: Pampa: Mineralization Continuity on 150m Step Outs
Pampa: Mineralization Continuity on 150m Step Outs 2.5 km 406,200 For personal use only 7,440,950 1.5 km 7,440,800 7,440,650 14
Slide 15: Pampa: Section 7,440,800-N (300m step-out drilling)
Pampa: Section 7,440,800-N (300m step-out drilling) SWRD-14 SWRD-03 SWRD-01 SMRD-16 SMRD-12 SMD-02 SMRD-13 SMRD-15 For personal use only SMRD-16 70m @ 1.0% Cu and 8g/t Ag from 434m Incl.10m @ 4.2% Cu and 38g/t SMRD-15 Ag from 438m 42m @ 0.5% Cu from 158m Incl. 20m @ 1.1% Cu and 3g/t Ag from 612m HG2
Slide 16: Pampa: Section 7,440,950-N (150m step-out drilling)
Pampa: Section 7,440,950-N (150m step-out drilling) SMR-10 SMR-11 SPRD-06 SPRD-05 SPRD-01 SPRD-04 For personal use only SPRD-01 146m of 0.41% Cu and 1.9g/t Ag from 286 m, incl. 50m @ 0.56% Cu and 2.4g/t Ag SPRD-06 from 290 m, incl. 424m of 0.38% Cu and 2.2g/t Ag from 10m of 1.90% Cu and 10.6g/t Ag 4
Slide 17: Pampa: Section 7,440,650-N (150m step-out drilling)
Pampa: Section 7,440,650-N (150m step-out drilling) SPRD-08B SPRD-07 SPRD-02 SPRD-03 For personal use only SPRD-08B 660m of 0.41% Cu and 1.8g/t Ag from 386m Incl. 98m of 1.21% Cu and 7.6g/t Ag from 386m And 16m of 2.90% Cu and HG2 21.2g/t Ag from 388m And 58m of 1.08% Cu and 6.5g/t Ag from 426m UHG
Slide 18: Pampa: Section 406,200-E (NS continuity towards the west)
Pampa: Section 406,200-E (NS continuity towards the west) SPRD-09 SMRD-34 SPRD-08B SMRD-16 SPRD-06 SMRD-20 SPRD-02 SPRD-03 For personal use only SPRD-08B 660m of 0.41% Cu and 1.8g/t Ag from 386m Incl. 98m of 1.21% Cu and 7.6g/t UHG Ag from 386m And 16m of 2.90% Cu and 21.2g/t Ag from 388m And 58m of
Slide 19: Pampa: >0.5% Cu Thickness Potential: Trend
Pampa: >0.5% Cu Thickness Potential: Trend 3 km For personal use only 2 km Thickness >0.5% Cu Composite Thickness (m) 19 Illustrative diagram displaying the Pampa Medina drilling to date with the undiluted composite thickness of each drillhole with copper grades exceeding 0.5% Cu. Thickness ranges b
Slide 20: Pampa: Ag vs Cu Variation (Logged Drill Samples)
Pampa: Ag vs Cu Variation (Logged Drill Samples) Min. Zone For personal Ag (g/t) use only CuT (%) 20 CuT (%) vs Ag (ppm ICP Assayed) Point Density Diagram
Slide 21: Pampa Medina District Scale: Exploration Potential - AMT
Pampa Medina District Scale: Exploration Potential - AMT 10 km Pampa Norte For personal use only 400 m AMT Sierra Norte 10 km 200 m AMT Sierra Norte Pampa Medina Madrugador Pampa Medina AMT Section 21 AMT Surveyed Areas
Slide 22: Sierra Norte: AMT 3D Model Looking NE
Sierra Norte: AMT 3D Model Looking NE Targeting undercover sediment horizons similar to Pampa Medina AMT 3D Model Area 8km For personal use only 6km 22
Slide 23: Q&A
For personal use only Q&A Hayden Locke Nico Cookson Sergio Rivera CEO & Director President VP, Exploration
Slide 24: Chile's New Copper Discovery
For personal use only CHILE’S NEW COPPER DISCOVERY Advancing Development With District Scale Potential CHILE’S NEW COPPER DISCOVERY Advancing Development With District Scale Potential