Get in Touch

Pampa Medina

Game Changing Growth Potential

Stage
Greenfield discovery - exploration step-out and infill drilling campaigns working toward a maiden resource estimate in 2027.
Scale
Significant mineralized sediment-hosted copper-silver system currently identified across a 3km x 1.5km Area of Interest at Pampa Medina within the broader, prospective 14,500ha Sierra de Medina land package.
Significant oxide resource potential to complement production at the MOD with a potential tier-one sulphide discovery at depth.
Geology
Manto-type sedimentary-hosted copper system seemingly unique, at this scale, in Chile. High-grade intersections of both copper oxide and copper sulphide mineralization across multiple stacked mantos.

Click to enlarge

Pampa Medina

Project Overview

The Pampa Medina project is an exploration and development project acquired by Marimaca Copper in October 2024. The drilling campaign at Pampa Medina to date has revealed exceptional results, demonstrating compelling district scale exploration with both copper oxide and sulphide potential.

Pampa Medina lies approximately 28 km from Marimaca’s flagship Marimaca Oxide Deposit (MOD) project and is located within the southern portion of the Company’s broader 14,500ha Sierra de Medina property package with no private land ownership. The claims also include the Madrugador claims which hosts a copper oxide deposit with a historical National Instrument 43-101 non-compliant resource estimate.

Near-surface oxide mineralization across a 1.6km x 1.4km area
Ultra high-grade (>5% CuT) sulphide zones identified more than 1.4km apart
Both oxide and sulphide systems remain open in all directions
30,000m extensional drilling program ongoing
No private land ownership across the 14,500ha Sierra de Medina package
Pampa Medina

Exploration Strategy

Following Marimaca’s consolidation of the project area and surrounding land packages in 2024, the Company reinterpreted all available geological information and developed an updated geological model for Pampa Medina, which identified the lower sedimentary units of interbedded sandstones, shales, tuffs and conglomerates as the priority target horizons for future drilling.
Marimaca’s drilling campaign at Pampa Medina is focused on three priority goals:
Definition of the high-grade central AOI
Delineating the identified oxide extensions
Further step-out drilling to test potential extensions of the broader system identified in geophysical work

Click to enlarge

Click to enlarge

Exploration to-Date

Led by renowned Chilean exploration geologist Sergio Rivera, VP Exploration, early drill results have already been promising. In July 2025, Marimaca reported outstanding drill results from the Pampa Medina project, confirming the first intersection of an exceptionally high-grade copper (>5% CuT with 15m true thickness) sulphide mineralization at depth. The near-surface oxide mineralization horizon continues to be expanded across a 1.6km by 1.4km area, with the deposit remaining open in all directions.

Since July 2025, results have continued to demonstrate success, extending the central high-grade sulphide zone and confirming multiple stacked manto-style copper-silver horizons across the sedimentary and volcanic sequence. The ongoing step-out program supports the geological model: multiple high-grade, stacked mantos with dominantly bornite-chalcocite mineralization hosted in interbedded sediments and volcaniclastic.

The area drilled to date at Pampa Medina represents only a very limited portion of the broader Sierra de Medina land package, and we are excited to continue testing the lateral and depth extent of the system following completion of this delineation campaign across the central AOI.

Drilling Highlights

The Pampa Medina drilling campaign has delivered multiple high-grade copper intersections across both oxide and sulphide targets, demonstrating the scale, continuity, and growth potential of the broader mineralized system.

SMRD-13

6m @ 12.0% Cu and 82g/t Ag

Within a broader interval of 100m @ 1.3% Cu and 7g/t Ag

SMRD-22

48m @ 2.05% Cu and 14g/t Ag

Within a broader 160m mineralized interval

SMRD-20

30m @ 1.7% Cu and 21g/t Ag

300m northern step-out success
SPRD-05

4m @ 11.3% Cu and 144g/t Ag

Within a broader interval of 96m @ 1.2% Cu and 12g/t Ag

SMD-01

68m @ 1.2% Cu and 14g/t Ag

Extension of historical oxide footprint 300m to the north

SMRD-16

10m @ 4.2% Cu and 38g/t Ag

Within a broader interval of 70m @ 1.0% Cu and 8g/t Ag

Geological Overview

Pampa Medina sits in a broad, flat pampa valley within Chile’s Atacama Desert. Pampa Medina is a stratiform or manto-style copper deposit dominantly hosted in Jurassic-Triassic sedimentary units (sandstones, conglomerates, tuffs and black shales) overlain by andesitic volcanics and underlain by an Upper Paleozoic complex of metamorphosed sediments, volcanics and intrusions. It’s intruded by a dyke swarm and affected by post mineral normal faulting. Copper was originally identified in near-surface oxide mineralization dominated by atacamite, chrysocolla and both secondary and primary chalcocite, and has now been identified in high-grade zones of chalcopyrite and bornite which extend laterally down-dip beyond the oxide-primary transition.
Following Marimaca’s consolidation of the project area and surrounding land packages in 2024, the Company reinterpreted all available geological information (for the first time as one) and developed an updated geological model for Pampa Medina, which identified the lower sedimentary units of interbedded sandstones, shales and conglomerates as the productive horizons for future drill targeting. Oxide copper mineralization was re-logged utilizing historical drilling in near-surface, uplifted blocks, with the model of continuity in the intact lithological sequence in deeper blocks for primary mineralization to be tested by Marimaca’s ongoing drilling campaign.
1 km
From MOD flagship project
1 %
Peak CuT grade (6m)
1 m
Phase 11 drilling underway
1 ha
Sierra De Medina land package
Pampa Medina

Geological Significance

Pampa Medina is a sediment-hosted, manto-style copper system located within the Atacama Desert. The project hosts both near-surface oxide mineralisation and deeper sulphide mineralisation within a continuous geological framework, creating a unique exploration opportunity. Following the consolidation of the district, extensive geological reinterpretation identified multiple productive horizons across the project area, supporting a revised exploration model and helping guide ongoing drilling programs. The scale and continuity of mineralisation continue to reinforce the project’s district-wide potential.

Exploration Success

Ongoing drilling programs have delivered encouraging results across both oxide and sulphide targets, significantly expanding the known footprint of mineralisation. Exploration has confirmed continuity across a large area while identifying new high-grade zones that remain open for future testing. Current programs are focused on defining the extent of the mineralised system and advancing the understanding of both oxide and sulphide opportunities across the broader district.
Cart (0 items)