Company Insight · Argentina · McEwen Copper · Los Azules · Copper Cathodes · Project Finance
McEwen Copper: Los Azules, Financing and Supplier Access
Los Azules has moved beyond geological promise. The project now has mineral reserves, a feasibility study, provincial environmental approval and RIGI status. McEwen Copper still has to assemble the debt, equity, infrastructure and supplier system required to turn that formal readiness into construction.
McEwen Copper has taken Los Azules further through the formal development sequence than most Argentine copper projects.
The project has a completed feasibility study, Proven and Probable Mineral Reserves, provincial environmental approval and admission to Argentina’s RIGI investment regime. The base case is designed to produce high-purity copper cathodes on site through heap leaching and SX/EW.
The remaining test is financial and operational. McEwen Copper still needs to complete sectoral permits, secure a multi-layer construction-financing package, resolve power and water requirements and obtain final corporate sanction before full mine construction.
For the wider market, see Econosur’s analysis of Argentina’s emerging copper economy, the Vicuña Corp. company insight, the Argentina insights overview and the Argentina market profile.
Core company reading:
Los Azules has passed major technical and regulatory milestones. McEwen Copper now has to create the financing and industrial structure that a conventional major mining company would normally provide from its own balance sheet.
Vicuña: backed by BHP and Lundin Mining, but still converting a preliminary economic assessment into a fully sanctioned cross-border infrastructure system.
McEwen Copper: already has a feasibility study, mineral reserves, provincial environmental approval and RIGI status, but still has to assemble the construction capital.
The two projects enter Argentina’s copper economy from opposite directions: one has balance-sheet strength and open execution layers; the other has formal project maturity and an open financing layer.
A shareholder structure built around different strategic interests
McEwen Copper is a private Canadian company. It owns 100% of Los Azules in San Juan and also holds the Elder Creek copper-gold project in Nevada. Since 2021, McEwen Copper has raised US$453 million through private placements. Its current project page says the latest financing implied a private market value of US$987 million for 32.9 million shares. A 2023 Nuton release described Elder Creek as subject to a Rio Tinto earn-in, but the later 2025 disclosures reviewed for this page do not restate that arrangement; the current earn-in status is therefore left open.
The current Los Azules project page lists McEwen Inc. with 46.3%, Stellantis with 18.2%, Nuton — a Rio Tinto venture — with 17.2%, Rob McEwen personally with 13.0%, Victor Smorgon Group with 3.0% and other shareholders with 2.3%.
| Shareholder | Current share | Strategic role |
|---|---|---|
| McEwen Inc. | 46.3% | Largest shareholder and corporate platform behind McEwen Copper. |
| Stellantis | 18.2% | Automotive investor with copper-purchase rights and an industrial raw-material interest. |
| Nuton / Rio Tinto | 17.2% | Mining and technology investor evaluating future leaching of primary sulphides. |
| Rob McEwen | 13.0% | Goldcorp founder with a personal investment cost basis above US$200 million across the companies and a stated annual salary of US$1. |
| Victor Smorgon Group | 3.0% | Family-office investment exposure. |
The ownership mix is strategic, but it is not the classic structure of a project controlled and financed by one operating major. Stellantis is an industrial buyer, Nuton is both investor and technology platform, Rob McEwen is personally exposed and McEwen Inc. remains the largest shareholder without a mining-major balance sheet.
The planned US$300 million IPO would equal about 30% of the latest implied private valuation, yet only 7.5% of the roughly US$4 billion financing target. That relationship shows why a public listing can support the equity package without closing the wider capital gap on its own.
Los Azules has a technical mine plan. McEwen Copper is still building the capital coalition that can execute it.
Andes Corporación Minera is the Argentine operating interface
Los Azules is commonly presented under the McEwen Copper name, but the Argentine project company is Andes Corporación Minera S.A. This distinction matters because local permits, the RIGI application and regulatory proceedings are handled through the Argentine legal entity.
Under its own legal name, Andes Corporación Minera filed the Los Azules RIGI application and participated in the 2026 ENRE proceeding concerning Vicuña’s requested access and priority in the Nueva San Juan–Rodeo corridor. The technical capacity dispute is examined in the infrastructure section below.
McEwen Copper Inc.: private Canadian holding and development company.
Andes Corporación Minera S.A.: Argentine project company used for permits, RIGI and local regulatory matters.
Los Azules: the copper project in San Juan.
Michael Meding connects the project to San Juan
Michael Meding is Vice President and General Manager of McEwen Copper. German-born and based in San Juan for more than a decade, he represents the project in financing discussions, infrastructure debates, provincial engagement and industry institutions.
Meding previously worked for Barrick and Trafigura. He also serves as president of GEMERA, Argentina’s exploration-company chamber, representing Andes Corporación Minera. The overlap between project leadership and industry representation shows how concentrated the institutional mining ecosystem in San Juan remains.
He has repeatedly described the practical project challenge as building a remote industrial system at high altitude: roads, power, logistics, camps, ports and financing have to work together before mining can begin.
His public position also reveals McEwen Copper’s operating model. The company depends on provincial support and private capital, while seeking public coordination for shared infrastructure rather than expecting the state to finance the complete system.
Project status in July 2026
Los Azules is an advanced development project, not an operating mine. The project completed its feasibility study in October 2025. San Juan approved the environmental impact assessment for construction and operation in December 2024, and Argentina admitted Los Azules to RIGI in September 2025.
Sectoral permit applications remain in process, including the water concession and infrastructure-related permits. McEwen Copper is also assembling project finance and evaluating a potential public listing.
The 2025 Feasibility Study provides reserves, a mine plan, costs, production and a project schedule.
The environmental impact assessment for construction and operation was approved in December 2024.
Water and infrastructure permits still require separate completion.
A feasibility study and RIGI status do not constitute a final investment decision or fully funded construction.
Three drilling seasons already created a project economy
Los Azules had already generated a substantial pre-production economy before a construction decision. McEwen reports more than 120,000 metres drilled across three seasons and more than 2.3 million working hours.
The 2023–2024 season alone included 70,000 metres of drilling with as many as 23 rigs operating simultaneously. That work supported the conversion of resources into the first Proven and Probable Mineral Reserves for the project.
These figures connect Los Azules to the wider Argentine copper economy before first production: drilling, camps, logistics, contractors and technical services become commercially real years before copper cathodes are produced.
What the 2025 feasibility study establishes
The independent Feasibility Study published on 7 October 2025 estimates initial capital of US$3.17 billion. At a copper price assumption of US$4.35 per pound, the study calculates an after-tax net present value of US$2.9 billion, an internal rate of return of 19.8% and a payback period of 3.9 years.
The base case has a 21-year mine life. Average annual copper-cathode production is estimated at 148,200 tonnes. Production is front-loaded: the first five years average about 204,800 tonnes per year. Some 2026 news reports describe a 22-year life; this page follows the current project page and feasibility-study base case of 21 years.
| Feasibility metric | 2025 base case | Evidence boundary |
|---|---|---|
| Initial capital | US$3.17 billion | Study estimate, not completed financing. |
| After-tax NPV (8%) | US$2.9 billion | Calculated at US$4.35/lb copper. |
| After-tax IRR | 19.8% | Modelled return, not guaranteed performance. |
| Average production | 148,200 t/year | Average over the 21-year base case. |
| Years 1–5 | 204,800 t/year | Front-loaded early production profile. |
| C1 cash cost | US$1.71/lb | Study estimate under model assumptions. |
| AISC | US$2.11/lb | Study estimate under model assumptions. |
Why the copper-cathode model changes the project
The cathode route was already present in the June 2023 PEA. McEwen’s current project page frames the 2025 feasibility design against the 2017 preliminary concept, whose conventional mill and flotation concentrator were replaced by heap leaching, solvent extraction and electrowinning. Los Azules is designed to produce 99.99% LME Grade A copper cathodes at the mine site.
This changes the industrial system around the project. Los Azules would not need a conventional tailings dam or rely on a foreign smelter to convert concentrate into metal. The project would transport finished cathodes rather than bulk concentrate.
McEwen reports 74% lower freshwater consumption than conventional milling, 48% lower electricity use than a concentrator and 72% lower mine-to-metal carbon intensity than the chosen industry comparison. The Feasibility Study states a carbon-neutrality goal for Scope 1 and Scope 2 emissions by 2038 and a target of 100% renewable electricity. These are study estimates and targets, not measured operating results.
Mineral reserves are a real maturity difference
The Feasibility Study reports 10.2 billion pounds of copper in Proven and Probable Mineral Reserves. The reserve estimate covers approximately 1.024 billion tonnes at an average grade of 0.453% copper.
Resources are reported separately and exclusive of reserves: 5.4 billion pounds of copper in Measured and Indicated Resources and 20.0 billion pounds in Inferred Resources. McEwen’s project-page prose calls the 5.4-billion-pound block “Indicated,” while the feasibility release and accompanying graphic classify it as Measured and Indicated; this page follows the feasibility-study disclosure.
Proven and Probable Reserves: included in the economic mine plan under the assumptions of the Feasibility Study.
Measured and Indicated Resources: reported outside the reserve total and not automatically part of the production plan.
Inferred Resources: lower-confidence material requiring further work before it can support reserve conversion.
This separates Los Azules from projects that have large resources but still depend on a preliminary economic assessment. A reserve does not guarantee construction, but it places the project at a more advanced technical decision point.
Exploration remains outside the base mine plan
Tango, Porfido Norte, Franca and Mercedes are priority porphyry targets outside the current feasibility-study mine plan. McEwen reports high-grade intercepts at Franca and geological indications at the other targets, but none of these exploration areas should be treated as reserves, planned production or part of the current economic case.
Nuton gives Rio Tinto a technology position inside the project
Nuton, a Rio Tinto venture, owns 17.2% of McEwen Copper. It is evaluating whether its leaching technology can economically process primary sulphide mineralization using the existing Los Azules infrastructure.
The Feasibility Study base case does not include this primary-sulphide extension. McEwen says Nuton technology or a later conventional concentrator could extend the mine life by more than 30 years, but that remains a future development option.
Reuters reported in May 2026 that Rio Tinto was considering increasing its position. No completed transaction was confirmed in the reviewed sources. The current evidence supports a strategic interest, not a change in control.
RIGI and environmental approval reduce risk—but do not complete it
San Juan approved the project’s environmental impact assessment for construction and operation in December 2024. Argentina admitted Los Azules to RIGI in September 2025, giving the approved investment long-term tax, customs, foreign-exchange and legal-stability provisions.
The RIGI-approved amount, the Feasibility Study capital estimate and the broader financing package are different figures. They should not be used interchangeably.
| Figure | Meaning | Why it differs |
|---|---|---|
| US$2.672bn | RIGI-approved investment amount | Amount admitted to the incentive regime. |
| US$3.17bn | Feasibility Study initial capital | Technical estimate for initial project development. |
| About US$4bn | Financing package discussed in 2026 | Could include debt, equity, infrastructure, equipment and liquidity components. |
Water concessions and infrastructure-related permits remain under review. RIGI approval therefore reduces economic-policy risk but does not replace sectoral permits, financing or final sanction.
The financing architecture will shape the mine and its suppliers
McEwen Copper is assembling a financing structure rather than relying on one mining-major balance sheet. The 2026 target structure discussed publicly is approximately 60% debt and 40% equity: about US$2.4 billion of project debt and US$1.6 billion of equity within a roughly US$4 billion package.
The equity component could include new strategic investors, a larger Rio Tinto position and a planned public offering. Michael Meding discussed a possible IPO of roughly US$300 million toward the end of 2026.
The feasibility study identified indicative support from Komatsu, Sandvik, other Tier-1 equipment manufacturers and European export-credit agencies. McEwen said these proposals could support more than US$1.1 billion of equipment and infrastructure financing. The current project page separately lists YPF Luz under strategic agreements as the renewable-power supplier.
In April 2026, Michael Meding said McEwen Copper was also working with the U.S. Export-Import Bank, the U.S. International Development Finance Corporation and financial groups in Europe and Japan. Export-credit support can be tied to equipment origin and may cover a large share of qualifying equipment costs, directly shaping which national supplier packages enter the project.
The SEC-filed IFC agreement goes further than a compliance exercise. It describes alignment with IFC Performance Standards as preparation for international project finance and names IFC as a potential lead lender and equity partner. No IFC loan or equity investment had been completed in the reviewed sources.
Debt: project lenders set technical, environmental, completion and reporting conditions.
Export-credit agencies: financing can be connected to equipment and services sourced from the supporting country.
OEM finance: equipment suppliers can become part of the capital structure rather than ordinary vendors.
Equity: new shareholders may bring technology, offtake interests or operating capability.
Expressions of interest, financial-adviser appointments and indicative proposals are not equivalent to committed and drawable construction finance. Final sanction depends on a complete package.
Electricity, roads and logistics remain project conditions
Los Azules lies about 80 kilometres west-northwest of Calingasta at approximately 3,500 metres above sea level. The project therefore depends on a high-altitude access and logistics system before it can operate as an industrial mine.
McEwen’s current project page lists a renewable-power supply agreement with YPF Luz and a target of 100% renewable electricity from wind, hydro and solar sources. The agreement does not remove the need to deliver transmission, substations and mine-site systems.
ENRE Resolution 79/2026 publicised Vicuña Argentina’s request for 260 MW and granted priority over defined parts of the Nueva San Juan–Rodeo and Rodeo–Chaparro capacity. Resolution 219/2026 later convened the public hearing and recorded the objections submitted by Andes Corporación Minera and other parties.
Andes argued that the headline 854 MVA corridor value depended on an “infinite power bus” assumption that CAMMESA itself described as not matching current system conditions. Its commissioned multi-user study modelled projected 2030 demand from Vicuña/Josemaría at 260 MW, Los Azules at 140 MW and El Pachón at 300 MW. A separate reported planning figure placed Los Azules demand at 184.8 MW for the 2031–2032 summer period. The two Los Azules figures refer to different modelling horizons and should not be treated as the same demand case.
The infrastructure question also includes the access road, sulphuric-acid logistics, equipment transport, construction camps, regional rail options and routes to Atlantic or Pacific ports. Shared infrastructure could lower duplication, but it also requires agreement between projects, governments, network operators and financiers.
Water and glaciers form the main counterposition
McEwen presents Los Azules as a lower-water, lower-carbon and regenerative copper project. The cathode-based design reduces water use relative to a conventional concentrator, but it does not eliminate water dependence or the need for a formal concession.
Environmental organisations and local water advocates argue that Los Azules lies within or near inventoried glacial and periglacial environments. They also question whether the approved environmental documentation provides enough clarity on water volumes and historic exploration impacts.
The provincial environmental approval and the federal glacier-law debate are separate legal levels. The approved EIA does not by itself resolve every water-right, glacier-inventory or federal-law question.
Confirmed: San Juan approved the project EIA in December 2024.
Confirmed: the water concession remained under review in the Feasibility Study timeline.
Reported counterposition: environmental groups argue that the project overlaps or is surrounded by protected glacial and periglacial environments.
Not established here: a final judicial finding that Los Azules violates the federal glacier law.
What McEwen Copper means for suppliers
McEwen Copper does not currently expose a supplier-access system as transparent as Vicuña’s Achilles platform. Los Azules procurement is instead likely to be shaped by financing conditions, equipment packages, IFC standards, local project-company requirements and construction milestones.
- heap-leach pad design, liners, irrigation and solution-management systems
- solvent extraction and electrowinning equipment
- sulphuric-acid storage, handling and transport
- renewable power, transmission, substations and mine electrification
- high-altitude roads, camps, logistics and construction services
- water systems, monitoring and environmental controls
- autonomous drilling, mine fleet and material-handling equipment
- IFC-aligned labour, community, safety and contractor documentation
The IFC collaboration is especially relevant. IFC Performance Standards can cascade into contractor selection, environmental and social management, labour practices, grievance systems, community engagement and reporting. The SEC-filed release also positions IFC as a potential lead lender and equity partner. That makes IFC both a qualification framework and a financing candidate, although no completed financing commitment was disclosed.
Market Reality: Los Azules has reserves, feasibility, environmental approval and RIGI. Its bottleneck is now the financing and infrastructure system required for construction.
Visibility: public coverage concentrates on resource size and copper demand. Less visible are the Argentine project entity, ECA-linked sourcing, IFC supplier standards, power allocation and the difference between RIGI capital, FS capital and total financing.
Human Interpretation: McEwen Copper is creating a mine through a coalition of shareholders, lenders, technology partners, OEMs and public institutions. Supplier access will depend on understanding which part of that coalition controls each package.
- McEwen Inc. — Los Azules project page: current ownership, drilling, feasibility metrics, sensitivity case, reserves, strategic agreements, permits and exploration targets.
- McEwen Copper — Los Azules Feasibility Study, 7 October 2025: capital, economics, production, cathode design, reserves, RIGI, carbon target and indicative financing proposals.
- McEwen Inc. — Filings and Technical Reports: Los Azules NI 43-101 Technical Report, November 2025.
- McEwen Inc. — Q1 2026 Form 10-Q: project ownership, reserves, financing and current corporate disclosure.
- McEwen Copper — IFC collaboration agreement filed with the SEC: IFC Performance Standards and IFC as a potential lead lender and equity partner.
- MINING.COM — McEwen Copper seeks US$4 billion: U.S. EXIM, DFC, European and Japanese financing discussions and ECA-linked equipment sourcing.
- Reuters — planned McEwen Copper IPO: proposed equity raise, financing structure and construction schedule.
- Reuters — Los Azules project debt: approximately US$2.4 billion debt and the wider 60:40 debt-equity structure.
- Reuters — Rio Tinto interest: potential stake increase, Nuton role and front-loaded production profile.
- Boletín Oficial — ENRE Resolution 79/2026: Vicuña’s 260 MW access request, the transmission expansion and the original priority provisions.
- Boletín Oficial — ENRE Resolution 219/2026: the later public-hearing decision, Andes Corporación Minera’s opposition, the multi-user 2030 model and the “infinite power bus” dispute.
- Power-demand evidence boundary: Resolution 219/2026 records a 140 MW Los Azules assumption in Andes’ 2030 multi-user model. The separately reported 184.8 MW figure refers to the 2031–2032 summer period and is not stated in Resolution 219 itself.
- Ámbito — Michael Meding and GEMERA: his role as chamber president representing Andes Corporación Minera.
- Acero y Roca — Michael Meding profile: German background, San Juan presence and infrastructure priorities.
- Agencia Tierra Viva — glacier and water counterposition: critical environmental claims and local water concerns.
- El Destape — glacier-inventory mapping: regional glacial and periglacial context.
- Evidence boundary: environmental-performance and sensitivity figures are study estimates. Financing discussions, ECA interest, IPO plans, IFC participation and a possible Rio Tinto investment do not constitute completed transactions.
- Econosur analysis updated 16 July 2026.
- Can McEwen Copper close the debt and equity package without losing project control?
- Will Rio Tinto increase its position or remain a minority technology investor?
- Which export-credit agencies and national supplier packages enter the final financing?
- When will the water concession and remaining infrastructure permits be completed?
- How will the ENRE dispute over Vicuña’s priority allocation affect Los Azules and the shared San Juan corridor?
- Can the cathode design achieve the modelled water, power and carbon performance?
- Will IFC Performance Standards become a formal contractor-qualification threshold?
- How will glacier-law reform affect legal and financing risk?
From resource headlines to company intelligence
McEwen Copper connects mineral reserves, cathode technology, strategic shareholders, project finance, infrastructure, permits and environmental risk.
Econosur prepares company reports and custom analysis for businesses, investors and institutions evaluating South American mining companies, project vehicles, suppliers and market access.
Explore Company ReportsFrequently asked questions
Who owns McEwen Copper?
McEwen Inc. holds 46.3%, Stellantis 18.2%, Nuton/Rio Tinto 17.2%, Rob McEwen 13.0%, Victor Smorgon Group 3.0% and other shareholders 2.3%, according to the current company project page.
Does Los Azules have mineral reserves?
Yes. The 2025 Feasibility Study reports 10.2 billion pounds of copper in Proven and Probable Mineral Reserves. Resources are reported separately and exclusive of reserves.
Is Los Azules under construction?
Los Azules has a feasibility study, provincial environmental approval and RIGI status. Remaining sectoral permits, financing and final corporate sanction are still required before full mine construction.
How much capital does Los Azules require?
The 2025 Feasibility Study estimates initial development capital of US$3.17 billion. A broader financing package discussed in 2026 was about US$4 billion and included debt, equity, equipment, infrastructure and liquidity components.
What will Los Azules produce?
The base case is designed to produce LME Grade A copper cathodes on site through heap leaching, solvent extraction and electrowinning, rather than exporting copper concentrate.
What is Nuton’s role at Los Azules?
Nuton, a Rio Tinto venture and shareholder in McEwen Copper, is evaluating leaching technology that could allow additional primary sulphide material to be processed using existing infrastructure. This potential extension is not included in the Feasibility Study base case.
What does the IFC agreement mean?
The SEC-filed agreement aligns Los Azules with IFC environmental and social standards and prepares IFC to be considered as a potential lead lender and equity partner. It is not a completed financing commitment.
What are the main unresolved risks?
The principal open issues are project finance, final corporate sanction, water and infrastructure permits, power availability, high-altitude logistics and the legal debate around glaciers and periglacial environments.
