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 has mineral reserves, a feasibility study, provincial environmental approval and RIGI status, while a US$240 million term loan now funds engineering and early works. McEwen Copper still has to complete full project financing and reach a final investment decision, now expected in mid-2027.
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. On 27 August 2026, McEwen Copper closed a US$240 million senior secured four-year term loan to continue engineering and early works. Engineering for the key SX/EW, sulphuric-acid and crushing packages has been awarded to Metso, the mining-fleet tender is in final evaluation and EPCM contractor selection is expected in Q4 2026. Final investment decision and full project financing are now expected in mid-2027, with commercial copper-cathode production still targeted for 2030, subject to financing and approvals.
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 and now has interim financing for engineering and early works. The decisive step remains the much larger construction-financing package and final investment decision expected in mid-2027.
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 more than US$290 million of personal capital invested across McEwen and McEwen Copper according to current company disclosure, 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.
Earlier 2026 discussions referred to a possible US$300 million IPO. The 27 August financing update is more cautious: preparations for a potential McEwen Copper listing continue in parallel with project debt work. The size and timing of any offering should therefore be treated as open rather than fixed.
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 September 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.
The project has moved further into execution planning since the previous Econosur update. On 27 August 2026, McEwen Copper closed a US$240 million senior secured four-year term loan. The proceeds are intended to continue engineering and early works at Los Azules and for general corporate purposes. The facility carries a 12% annual interest rate and was funded by Sprott Natural Resource Investment Partners for US$112 million, Rob McEwen for US$85 million and other lenders for US$43 million.
The same project update states that engineering for the key process-equipment packages — solvent extraction/electrowinning, sulphuric acid and crushing — has been awarded to Metso. The mining-fleet tender is in final evaluation, and EPCM contractor selection is expected in Q4 2026. Engineering for the final investment decision was described as ahead of plan.
The 2025–2026 field campaign was completed with more than 5,600 metres of drilling. Geotechnical results are being incorporated into open-pit design, while condemnation drilling confirmed the planned North-East rock-storage location. Access-road and site-camp construction remain part of the early-works program.
The financing timeline has changed materially. McEwen now expects the final investment decision and full project financing in mid-2027, rather than the earlier year-end-2026 timetable. Commercial copper-cathode production remains targeted for 2030, subject to project financing and customary approvals.
Metso has been awarded engineering for the SX/EW, sulphuric-acid and crushing packages.
The term loan funds continued engineering and early works while the larger project-finance structure is assembled.
The mining-fleet tender is in final evaluation and EPCM contractor selection is expected in Q4 2026.
The current timetable places both in mid-2027. The US$240 million loan should not be interpreted as full construction financing.
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 long-term project-finance concept discussed publicly has combined commercial bank debt, export-credit agencies, development-finance institutions, equipment finance and equity.
A concrete interim layer was added on 27 August 2026. McEwen Copper closed a US$240 million senior secured four-year term loan carrying 12% annual interest. Sprott Natural Resource Investment Partners provided US$112 million, Rob McEwen US$85 million and other lenders US$43 million. The proceeds are intended to continue engineering and early works at Los Azules and for general corporate purposes.
This loan materially extends the project’s financial runway, but it does not close the construction-financing requirement. McEwen now expects the final investment decision and full project financing in mid-2027. Société Générale remains the sole financial adviser for the project debt process, with a mandate covering export-credit agency, commercial bank, multilateral, development-finance and potential capital-markets components.
Preparations for a potential McEwen Copper IPO continue in parallel. The earlier public financing concept of roughly 60% debt and 40% equity remains useful as background, but the final structure has not been completed and may change as lender, ECA, strategic-investor and capital-markets discussions advance.
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.
The SEC-filed IFC agreement adds another layer. It aligns Los Azules with IFC Performance Standards and gives IFC customary rights, at its discretion, to participate as lender and/or arranger in prospective project debt financing. It is not a financing commitment.
Interim project funding: the US$240 million term loan keeps engineering and early works moving before the full financing package is complete.
Project debt: lenders can set technical, environmental, completion, insurance and reporting conditions that flow into contractor and supplier requirements.
Export-credit agencies: equipment and infrastructure finance can be linked to supplier origin, potentially influencing which national supplier packages become competitive.
OEM finance: major equipment suppliers can become part of the financing architecture rather than ordinary vendors.
Equity and IPO: new investors may add capital, technology, offtake interests or market discipline, but the final ownership and financing structure remains open.
The financing sequence is therefore directly relevant to suppliers. Metso has already secured engineering packages before FID, while the mining-fleet tender and EPCM selection are advancing. Other packages will remain dependent on financing milestones and final sanction.
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.
The November 2025 technical report defines a dedicated power concept for Los Azules: a double-circuit 220 kV overhead transmission line running approximately 122 kilometres from the Calingasta transformer station to the Los Azules substation. Project demand is modelled to rise from roughly 39 MW gross in the pre-production period to a peak of around 157 MW gross as processing and mine power requirements increase. Local reporting in late August 2026 said the company had presented the line to Calingasta stakeholders, with an estimated investment of about US$300 million and possible construction from 2027. The cost and timing should be treated as reported planning figures until formal approvals and final investment decisions are completed.
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. After the June public hearing, Resolution 330/2026 authorised the 260 MW access and the associated 500 kV expansion and confirmed the priority framework. The objections submitted by Andes Corporación Minera and other parties therefore form part of the regulatory history, not an unresolved decision.
Andes had 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. For Los Azules, the commercial issue is now how its future power requirements fit around a corridor in which Vicuña’s access and priority rights have been formally confirmed.
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. The procurement sequence is nevertheless becoming more visible. Engineering for the SX/EW, sulphuric-acid and crushing packages has now been awarded to Metso; the mining-fleet tender is in final evaluation; EPCM contractor selection is expected in Q4 2026; and road and camp works are already under way.
This means supplier demand should be separated into three layers: packages already moving through engineering or early works, larger equipment and construction packages that depend on mid-2027 FID and full financing, and later operating demand after commissioning. Financing conditions, OEM participation, export-credit support, IFC standards and the identity of the EPCM contractor can all influence who controls individual packages.
- 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 crossed several thresholds that many development projects never reach: feasibility, Mineral Reserves, environmental approval, RIGI status, early works and now a US$240 million term loan. The remaining threshold is larger: full project financing and FID are now expected in mid-2027.
Visibility: public information has improved materially because named procurement steps are now visible. Metso controls engineering for key process packages, the mining-fleet tender is in final evaluation and EPCM selection is expected in Q4 2026. What remains less visible is the downstream package map: which EPCM-controlled packages follow, which OEM finance routes become binding, where local subcontractors enter and which categories remain open to new international suppliers.
Interpretation: the commercial window is moving from general project positioning toward specific procurement routes. Suppliers that wait for FID will enter after several engineering and vendor decisions have already been taken. The practical task is to identify which package is being specified now, who controls it and which financing, qualification and local-execution conditions shape access.
Argentina’s copper buildout: Where the supplier opportunity starts before production
Marcus A. Volz examines Vicuña and Los Azules as examples of why supplier positioning begins during engineering, early works, qualification and procurement rather than when copper production starts. The article notes Los Azules’ US$240 million term loan, the Metso process-engineering packages, the mining-fleet tender and the expected Q4 2026 EPCM selection.
Three business questions public project data does not answer
Which Los Azules packages are commercially active now, and which still depend on FID?
Public disclosures now identify vendor engineering, fleet evaluation, power assessment, EPCM selection and early road and camp works. They do not provide a complete live package register, bidder list, award status or procurement timetable for every category. Suppliers therefore need to separate work already moving from the larger equipment and construction packages that remain conditional on financing and sanction.
Who actually controls the buying decision for a specific product or service?
The relevant decision maker may be McEwen Copper, Andes Corporación Minera, the selected EPCM contractor, an OEM, an infrastructure contractor or a financing-linked procurement route. Export-credit and OEM financing can also connect sourcing to supplier origin. Ownership of the project alone does not reveal who qualifies vendors, issues the package or signs the contract.
What must an international supplier verify before committing sales resources?
A supplier should verify package timing, technical specifications, incumbent vendors, local-service requirements, contractor routes, financing-linked sourcing conditions, IFC-aligned documentation, payment and bonding expectations and whether local representation or subcontracting capacity is required. A technically suitable product is not automatically a reachable commercial opportunity.
How Econosur can investigate Los Azules supplier opportunities
Published project information establishes the formal project picture. Econosur research focuses on the commercial layer that is usually not visible in public releases: active and upcoming packages, package owners, bidder routes, incumbent suppliers, financing-linked sourcing conditions and the practical requirements for reaching a procurement process.
Need to know where Los Azules procurement is actually moving?
Econosur can investigate a defined supplier category, procurement package, buyer structure or infrastructure dependency and separate public project visibility from the commercial information required for a real sales decision.
Discuss a Research Question- McEwen Inc. — Los Azules project page: current ownership, operating metrics, reserves, strategic agreements, permits and exploration targets.
- McEwen Copper — Los Azules Feasibility Study, 7 October 2025: capital, economics, production, cathode design, reserves, environmental metrics and indicative financing proposals.
- McEwen Inc. — filings and technical reports: Los Azules NI 43-101 Technical Report, November 2025, including the 122 km 220 kV transmission concept and project power-demand model.
- McEwen Inc. — Q1 2026 Form 10-Q: project ownership, reserves, financing and corporate disclosure.
- McEwen Inc. — Q2 2026 results, 5 August 2026: FID work-program progress, vendor engineering, fleet and power assessment, EPCM selection and early road and camp construction.
- McEwen Copper — US$240 million term loan, 27 August 2026: loan structure, use of proceeds, mid-2027 FID/full-financing target, Metso process engineering, fleet tender, EPCM timing and 2025–2026 drilling update.
- McEwen Copper — Société Générale debt-financing mandate, 14 May 2026: financing strategy and potential lender categories.
- McEwen Copper — IFC collaboration agreement filed with the SEC: IFC Performance Standards and IFC’s potential financing role.
- Argentina Ministry of Economy — Resolution 1553/2025: Los Azules RIGI approval, US$2.672 billion investment plan and Andes Corporación Minera as the project vehicle.
- ENRE Resolution 219/2026: Andes Corporación Minera’s objections, multi-user power modelling and Los Azules’ position in the San Juan grid-access dispute.
- ENReGE Resolution 330/2026: final authorization of Vicuña’s 260 MW access and associated transmission expansion, relevant to Los Azules’ future grid strategy.
- McEwen Copper — environmental approval, 3 December 2024: San Juan approval of the Environmental Impact Assessment for construction and operation.
Evidence boundary: company forecasts, feasibility metrics, environmental-performance figures and planned schedules are corporate or technical-study disclosures. Financing proposals, potential IFC participation, IPO preparation and future construction dates should not be treated as completed transactions or guaranteed outcomes.
- Reuters — planned McEwen Copper IPO: proposed equity raise, financing structure and earlier project timetable.
- Reuters — Los Azules project debt: project-debt concept and broader debt-equity financing structure.
- Reuters — Rio Tinto interest: potential stake increase and Nuton’s strategic position.
- MINING.COM — McEwen Copper financing discussions: U.S. EXIM, DFC, European and Japanese financing discussions and ECA-linked sourcing.
- Bloomberg Línea — US$240 million Los Azules financing, 28 August 2026: independent reporting on the new loan and revised mid-2027 investment-decision timetable.
- Comunidad Minera — Los Azules power line and financing, 3 September 2026: reporting on the 122 km 220 kV line, approximately US$300 million planning figure and possible 2027 construction start.
- Ámbito — Michael Meding and GEMERA: industry-role context.
- Agencia Tierra Viva — glacier and water counterposition: environmental criticism and water concerns.
- El Destape — glacier-inventory context: reporting on glacial and periglacial areas relevant to the legal debate.
Global Mining Review — “Argentina’s copper buildout: Where the supplier opportunity starts before production”, 14 September 2026. The article uses Los Azules and Vicuña to examine supplier timing, engineering, early works and procurement before production.
- Can McEwen Copper complete full project financing and reach FID by the revised mid-2027 target?
- 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 Los Azules adapt its future power strategy now that Resolution 330/2026 has confirmed Vicuña’s 260 MW access and priority framework?
- 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?
Frequently 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?
Road and site-camp construction have started as early works, while detailed engineering is active. McEwen Copper closed a US$240 million term loan in August 2026 to continue engineering and early works. Full mine construction still depends on full project financing and a final investment decision, now expected in mid-2027.
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 work is already under way before a final investment decision?
Engineering for the SX/EW, sulphuric-acid and crushing packages has been awarded to Metso, the mining-fleet tender is in final evaluation, EPCM contractor selection is expected in Q4 2026, and access-road and site-camp construction are under way.
What are the main unresolved risks?
The principal open issues are full project financing, final investment decision, water and infrastructure permits, power delivery, high-altitude logistics and the legal debate around glaciers and periglacial environments. The US$240 million term loan funds engineering and early works but is not the full construction-financing package.
