Marimaca Copper (TSX:MARI) - Tier-One Discovery Potential Alongside MOD Growth

Why It Matters

The discovery could transform Marimaca into a major copper producer, unlocking significant value for shareholders while addressing global copper supply constraints.

Key Takeaways

• Marimaca Copper sees tier‑one sulfide discovery at Pamper Medina.
• Drill program targets 35,000 m to confirm inferred resource by Sep.
• Oxide and sulfide zones could deliver 25‑75 kt copper annually.
• Company allocates $30 M to exploration, reducing initial budget.
• MOD project valued at $1.1 bn, supporting near‑term financing.

Summary

Marimaca Copper (TSX:MARI) outlined its progress on the Pamper Medina oxide‑sulfide system in northern Chile and provided an update on the MOD development project, positioning the company for a potential tier‑one copper discovery.

Recent drilling revealed a continuous, high‑grade mineralized zone extending over 1.5 km east‑west with widths of 600‑800 m. The company plans an additional 35,000 m of step‑out drilling at 300‑meter spacing, aiming to deliver an inferred resource by September and to assess continuity over a 3‑4 km trend.

CEO Aiden Lockach emphasized that the system could support 100,000 t of copper annually for more than 20 years, describing it as “one of the most significant new copper discoveries in Chile.” He also noted the MOD project’s $1.1 bn pre‑tax NPV, valuing the company at roughly 7.75 × NAV.

If the resource and engineering milestones are met, Marimaca could add 25‑75 kt of copper cathode capacity, bolster its balance sheet with $300 m of raised capital, and become a rare new copper producer in a market where existing mines are declining, offering investors a high‑growth exposure.

Original Description

Interview with Hayden Locke, President & CEO of Marimaca Copper Corp.

Our previous interview: https://www.cruxinvestor.com/posts/marimaca-copper-tsxmari-permitted-project-eyes-2026-build-start-8934

Recording date: 18th May 2026

Marimaca Copper is advancing a dual-track strategy in northern Chile, combining near-term production from its Marimaca Oxide Deposit (MOD) with the exploration of a potentially transformative sulfide discovery at Pampa Medina. The MOD project, expected to reach a final investment decision by early 2027, is designed to produce 50,000 tonnes of copper cathode annually, with potential expansion to 75,000 tonnes by incorporating nearby oxide resources. At a copper price of $5 per pound, MOD carries a pre-tax net present value of $1.1 billion, roughly in line with the company’s current market valuation, suggesting limited market recognition of its exploration upside.

That upside is increasingly centered on Pampa Medina, where drilling has revealed consistent, high-grade mineralisation across a footprint extending over 1.5 kilometers north-south and up to 800 meters east-west:

https://marimaca.com/marimaca-reports-additional-high-grade-silver-assays-from-consolidated-drill-results-at-pampa-medina-2/

The geological continuity and scale compare favorably with major global deposits, and early results indicate the presence of a district-scale system with significant expansion potential. Marimaca is investing $30 million in a 35,000-meter drilling campaign to define an initial inferred resource by the second quarter of 2027.

Importantly, the mineralogy at Pampa Medina—dominated by bornite and chalcocite—offers processing flexibility, including the potential for lower-cost heap leaching alongside conventional methods. Meanwhile, the company is mitigating operational risks at MOD through a sulfuric acid hedging strategy using elemental sulfur, reducing exposure to volatile input costs.

With strong progress in permitting, financing, and engineering, MOD is positioned for construction readiness in early 2027. At the same time, Pampa Medina represents a potentially tier-one discovery that remains largely unpriced by the market, creating a compelling combination of near-term production and long-term exploration upside.

View Marimaca Copper's company profile: https://www.cruxinvestor.com/companies/marimaca-copper

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