Torex Gold’s Media Luna North and the $110M Brownfield Bet

A brownfield expansion that requires roughly US$110 million to unlock production from a deposit sitting above US$850 million of already-built infrastructure is not a typical mining proposition. That asymmetry is exactly what makes Media Luna North worth understanding.

Torex Gold declared commercial production at the Media Luna underground mine on 1 May 2025, completing a years-long build that converted the Morelos Complex in Guerrero, Mexico, into a fully integrated polymetallic operation. Media Luna North, formerly known as EPO, is the next planned addition to that system. Formally integrated into the Morelos Mine Plan in September 2024 following an internal pre-feasibility study, the project targets first production by late 2026. For investors tracking Mexican gold-copper operations, Media Luna North sits at the intersection of mine-life extension, brownfield capital efficiency, and polymetallic commodity exposure.

This analysis explains how Media Luna North works, why its infrastructure design reduces development risk, and what the project means for investors assessing the Morelos Complex’s long-term production profile.

What brownfield expansion actually means for mining investors

Mining investors frequently use “brownfield” as shorthand for lower risk. The label is accurate only when the quality of the infrastructure connection is genuine, not incidental.

A brownfield expansion develops new ore zones on or adjacent to an existing operational site. It leverages processing capacity, tailings management, power systems, and workforce that are already functioning. A greenfield equivalent in a comparable jurisdiction requires a full standalone infrastructure build, often running to multiples of the underlying ore value and extending timelines by years.

The distinction matters across four dimensions:

• Infrastructure: Brownfield expansions feed into existing plant and logistics networks. Greenfield projects require construction from scratch.
• Permitting complexity: Brownfield work on established sites typically carries lower incremental permitting burden than new project applications in the same jurisdiction.
• Timeline to production: Brownfield projects can reach first ore faster because the processing and logistics chain already exists.
• Incremental capital required: Brownfield capital is directed at access and extraction, not at rebuilding the full fixed-cost base.

Media Luna North is a development-stage project, 100% owned by Torex through its subsidiary Minera Media Luna, S.A. de C.V., operating within a 29,000-hectare land package that already hosts two producing underground mines and a fully integrated processing plant. It is best evaluated as a capital-efficient mine-life extension, not a standalone discovery play.

Polymetallic underground operations in Latin America face a common set of infrastructure and tailings management challenges that brownfield expansions inherit alongside their cost advantages, with the existing tailings system’s capacity and design becoming a binding constraint on how much additional ore feed an expansion can realistically sustain.

The Guajes Tunnel as the backbone of a connected underground system

The physical logic of Media Luna North begins with the Guajes Tunnel, an approximately 7 km underground conduit built to connect the Media Luna deposits on the south side of the Balsas River to the processing plant on the north side. The tunnel moves ore, materials, supplies, and workers between the Media Luna cluster and the plant. It is the backbone of the Morelos underground system, and its existence is the reason Media Luna North can be developed at a fraction of standalone cost.

Ramp connection and ore haulage corridor

Media Luna North gains underground access through a dedicated 650-metre ramp branching directly off the existing Guajes Tunnel. This ramp eliminates the need for a new standalone entry corridor, tying the expansion into the same infrastructure that already serves the parent operation.

The 650-metre ramp off the Guajes Tunnel and a 1,000-metre underground truck haulage corridor are the primary new connections required for Media Luna North, not a new access system.

Ore extracted from the Media Luna North zone travels via the 1,000-metre haulage corridor to the ore handling system already in place at Media Luna. From there, it feeds directly into the established polymetallic processing circuit. No separate plant, tailings facility, or standalone surface logistics hub is required. Mining capacity for Media Luna North is designed for up to 2,300 tonnes per day.

The infrastructure connection is structural, not incidental. That distinction is what determines whether the brownfield label reflects genuine capital efficiency or simply geographic proximity.

The capital arithmetic of building on top of what already exists

The main Media Luna Project required approximately US$850 million to develop and bring to commercial production. That figure funded the Guajes Tunnel, portals, paste plant, and all associated surface and underground infrastructure. The processing plant, tailings facilities, power systems, and site-wide workforce are operational.

Media Luna North’s total project capital is estimated at US$108-113 million, with US$100-105 million planned for deployment in 2026 to bring the project into production by year-end.

Each additional ounce produced from Media Luna North extends the period over which the Morelos Complex’s fixed costs, including the processing plant, tailings facilities, power infrastructure, and site management, are amortised. This enhances complex-level net present value without commensurate increases in fixed capital.

US$110 million unlocking 2,300 t/d of additional ore feed into a proven, already-funded processing system represents a structurally different risk-return profile than a standalone mine build of equivalent scale.

Resource base, commodity profile, and what the polymetallic mix means for revenue resilience

Media Luna North targets the same polymetallic metal suite as its parent operation: gold as the primary revenue driver, copper as a significant credit, and silver as an additional credit. The multi-commodity profile supports revenue resilience and lowers unit costs through by-product credits, reducing concentration risk relative to single-commodity operations.

The broader market context around copper project development is directly relevant here: record copper prices have accelerated capital allocation decisions at polymetallic operations globally, creating a competitive environment for the same engineering and procurement resources that brownfield expansions like Media Luna North depend on.

The deposit’s Indicated resources grew to more than 1.1 million gold-equivalent ounces following successful step-out drilling in 2023, with much of the previous Inferred material upgraded to Indicated within a well-understood skarn system. Media Luna North ore feeds directly into the existing polymetallic processing circuit, producing gold dore and precious-metal-rich copper concentrates with no new metallurgical circuits required.

2026 Morelos Complex production guidance:

• Gold: 320,000-365,000 ounces
• Silver: 2.2-2.5 million ounces
• Copper: 60-65 million pounds

Torex’s longer-term guidance projects 420,000-470,000 gold-equivalent ounces per year through at least 2030, with complex mine life extending through at least 2035.

In 2024, approximately US$10 million was budgeted for more than 24,000 m of infill and expansion drilling at EPO/Media Luna North. For 2026, approximately 62,500 m of drilling is planned across the Media Luna Cluster, including approximately 25,000 m on the main Media Luna orebody and substantial additional metres at Media Luna North and the eastern cluster extension. This ongoing programme is designed to grow resources, offset depletion, and test extensions of the skarn system.

Guerrero operating environment and the risk factors investors should hold alongside the opportunity

The Morelos Complex sits in the Guerrero Gold Belt, one of Mexico’s most prolific gold regions. Commercial production at the complex began at ELG in 2016, giving Torex approximately a decade of continuous operation in Guerrero by August 2026.

That track record is meaningful. It is not, however, a complete shield against jurisdictional risk. Guerrero carries security and social-licence considerations that are a non-trivial component of any risk-adjusted valuation. Historical security challenges in the region remain part of the operating landscape, and investors should incorporate these factors alongside the operational and capital efficiency arguments.

Several factors partially mitigate jurisdictional risk:

• Underground extraction methods for both Media Luna and Media Luna North limit visible surface disturbance relative to open-pit alternatives
• Established community relationships developed over nearly a decade of continuous operation
• Brownfield expansion on an established site carries lower incremental permitting complexity than a new project application in the same jurisdiction
• Long-standing regulatory presence and operational continuity at the Morelos Complex

Investors who treat Torex’s operating history as complete insulation against regional risks are making an error. Investors who treat Guerrero’s challenges as a reason to disregard the project’s structural merits are making a different one. The more defensible position sits between.

Jurisdictional risk in gold-producing regions takes markedly different forms across geographies: Mali’s state infrastructure fund model represents a fiscal extraction mechanism, while Guerrero’s risk profile is more closely tied to security environment and community relations, requiring investors to apply region-specific frameworks rather than a single emerging-market discount.

What Media Luna North means for the Morelos Complex as a long-term investment proposition

Media Luna North is a capital-efficient extension of an operating complex. The upside is located in stable, extended cash flow from a proven system rather than in discovery-stage resource growth or re-rating from a new find. Five conclusions carry the most weight for investors evaluating the proposition:

1. Infrastructure connection quality: The 650-metre ramp and 1,000-metre haulage corridor integrate Media Luna North structurally into the Morelos underground system, not as an adjacent project but as part of the same ore flow.
2. Incremental capital ratio: US$108-113 million against approximately US$850 million of infrastructure already in place is an asymmetry that defines the brownfield value case.
3. Resource and metallurgical familiarity: More than 1.1 million gold-equivalent Indicated ounces within a well-understood skarn system feeding a proven processing flowsheet, with no new metallurgical development required.
4. Mine-life impact: Complex mine life is guided through at least 2035, with Media Luna North as one of the key sustaining levers.
5. Polymetallic revenue resilience: The gold-copper-silver profile reduces reliance on a single commodity price and supports lower unit costs through by-product credits.

This proposition suits investors seeking de-risked Mexican gold-copper exposure with an emphasis on mine-life extension and operational continuity, rather than high-risk frontier exploration leverage. Execution risk remains between now and late 2026, particularly on the US$100-105 million capital deployment this year.

Underground mine throughput ramp-up sequences, where projects commission infrastructure in phases before achieving design capacity, are a common source of execution risk in the period between first ore and declared commercial production, a phase that Media Luna North will enter in the second half of 2026.

Media Luna North’s place in a mine-life extension that has already been built to last

Media Luna North’s value is inseparable from the infrastructure already built at the Morelos Complex. The 650-metre ramp, the 1,000-metre haulage corridor, and the 2,300 t/d mining capacity are meaningful only because they connect to a tunnel, a plant, and a tailings system that cost US$850 million to build and are already operational. The project should be evaluated as a system-level contribution, not a standalone asset.

Two near-term milestones will determine whether the brownfield logic fully translates into production reality. The first is the late 2026 production target itself. The second is the US$100-105 million capital deployment required this year to reach it. Both carry execution risk that investors should monitor directly.

For 2026, approximately 62,500 m of drilling is planned across the Media Luna Cluster, a programme designed to grow resources and offset depletion. Results from this programme may be the clearest leading indicator of resource trajectory and mine-life sustainability beyond 2035.

For investors who track the Morelos Complex, the development timeline and ongoing drilling results are the two data points most likely to move the long-term valuation picture. The infrastructure has been built. The question now is whether the ore and the execution follow.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Mining equities are subject to commodity price, operational, and jurisdictional risks. Forward-looking statements regarding production targets, capital estimates, and mine-life projections are subject to change based on market developments and company performance.