Mining Press Roundup: Hudbay and Mitsubishi Sanction Copper World Despite Cost Inflation

Hudbay Minerals and Japan's Mitsubishi have approved construction of the $2.1-billion (C$2.9 billion) Copper World project in southern Arizona, despite a 59% surge in construction costs. The sanction follows a definitive feasibility study and clears the way for one of the largest new copper mines in the United States to start producing in the second half of 2029. A final investment decision taken in spite of that inflation suggests the partners still see value in a US copper project at current price assumptions. The rest of today's announcements show how differently financing, permitting and politics are playing out across tin, rare earths, uranium, lithium and seabed minerals.

Hudbay Minerals: Copper World Gets the Green Light

Hudbay said Wednesday that scope changes since a 2023 prefeasibility study have resulted in $200 million of additional capital costs. Capital costs were previously estimated at $1.3 billion in the 2023 study. Copper World is about 50 km southeast of Tucson. It is expected to help double Hudbay's consolidated annual copper production to about 250,000 tonnes, alongside growth initiatives at existing operations.

The economics depend heavily on the copper price. At a long-term price of $5 per lb. and an 8% discount rate, Copper World has an after-tax NPV of $1.2 billion, an IRR of 17% and a payback period of 5.4 years, Hudbay said. If copper averages $6 per lb., the NPV rises to $2.3 billion and the IRR to 22%. Jefferies mining analyst Fahad Tariq made the same point in a note: "Copper World is highly leveraged to copper prices."

The base case contemplates a 15-year mine life based on proven and probable reserves of 390 million tonnes grading 0.47% copper. Annual copper production would average 102,000 tonnes during the first decade, with average cash costs estimated at $1.65 per lb. over that period.

Funding is split across partners and lenders. Sources of cash include Mitsubishi's initial $600 million contribution, $230 million in stream financing from Wheaton Precious Metals and an anticipated $650 million project debt facility. Mitsubishi acquired a 30% stake through a $600-million investment completed in January 2026, leaving Hudbay with 70% ownership. Hudbay expects to contribute about $500 million, with its first installment deferred until 2028.

Cornish Metals: A Deeply Discounted Raise to Restart South Crofty

Cornish Metals (AIM: TIN) is seeking £135 million ($180 million) through a deeply discounted share sale to secure financing for the restart of its South Crofty tin mine. It warned it could be unable to pay its debts if the deal fails. The proposed price of 60 pence is 41% below the last closing price before trading was paused last Wednesday.

The equity sale would release $210 million of bond financing held in escrow, subject to other conditions. Cornish must complete an equity raise of at least US$161 million by Nov. 21 to satisfy a condition for releasing the bond proceeds, unless bondholders extend the deadline. The six-year bonds carry annual interest of 13.5%.

The dilution is considerable. A £135-million raise at the proposed price would require roughly 225 million new shares, compared with about 125.5 million already outstanding, before other issuances. The timeline has also moved. CEO Don Turvey said on May 7 that the company expected to be fully funded and to announce a final investment decision during the summer months. The new proposal instead anticipates a shareholder meeting around Nov. 9.

Cornish has some backing in place. Glencore has conditionally agreed to invest £11.2 million and signed an agreement to buy all of South Crofty's tin concentrate for six years from commercial production. Vision Blue Resources, the National Wealth Fund and Cornish directors, together controlling about 58% of existing shares, have committed to support the financing vote.

Phoenix Tailings: Rare Earths Processing Heads to Rochester

Phoenix Tailings announced Tuesday it will build a $375-million commercial-scale rare earths processing facility in Rochester, New York, as the US looks to loosen China's grip on minerals. The plant, called Freedom Separation, will process more than 18,000 tons of mined and recycled rare earth feedstock annually. At full capacity it will produce over 4,400 tons per year of separated rare earth oxides. Production is expected to ramp up in 2027 before reaching full capacity in 2028.

The facility forms part of Phoenix Tailings' $1.2 billion Freedom project. That project has secured a $500-million conditional loan commitment from the Department of War's Office of Strategic Capital. New York governor Kathy Hochul said the state will provide $3 million in performance-based tax credits, Reuters reported.

Aclara Resources: Penco Study Improves as Capex Climbs

An updated preliminary economic assessment for Aclara Resources' Penco Module rare earths project in Chile almost doubles its post-tax net present value over a 2021 study, despite a doubling in initial capital costs. Penco's NPV is now estimated at C$344 million ($243 million), compared with pre-production costs of C$244 million ($178 million), Aclara said Monday.

The update raises open-pit mine life by three years to 17 years and lifts the internal rate of return by three percentage points to 26.1%. The updated resource is 35.8 million measured and indicated tonnes grading 2,095 parts per million total rare earth oxides, for 75,025 contained tonnes TREO. That is a 19% rise in contained rare earths.

Penco is meant to feed Aclara's Dynamo plant in Louisiana, where construction is targeted to begin in early 2027. Dynamo would also process rare earths mined at the Carina Module in Brazil. The Export-Import Bank of the U.S. could provide up to $750 million towards construction, subject to various conditions, the company announced in September. Aclara plans to complete a Penco feasibility study in the first quarter of 2027, and construction of the mine is expected to be finished in 2028.

Aura Energy: Tiris Moves Toward a Decision

Aura Energy is moving closer to building Mauritania's first uranium mine. A bankable feasibility study outlined a $500-million valuation for its Tiris project, despite a 52% increase in construction costs to $350 million. The study gives a post-tax IRR of 28%, 11 percentage points lower than in a 2024 technical report, even though the uranium price assumption rose 12% to $90 per pound.

Financing is the open item. Aura still needs to secure most of the $400 million required to develop Tiris, and is in discussions with the U.S. International Development Finance Corporation for about $150–170 million of senior debt. A pilot plant starts operating in November ahead of a final investment decision in December, and first production could start at the end of 2028.

Jurisdiction risk is part of the picture. Security analyst Sean Hagarty of Region Alert told The Northern Miner: "Mauritania renegotiates hard." He added: "But unlike Niger and Mali, it hasn't taken mines away."

Lithium Africa: Two Offers on the Table for Springbok

Lithium Africa (TSX-V: LAF) has received two non-binding financing offers for its Springbok lithium project in South Africa, as it targets first production in the second half of 2027. The $60-million proposal comes from a lithium processing company backed by a Fortune Global 500 group. It would buy a 55% interest in a new holding company, with about $10 million for district drilling and $50 million for a processing plant.

The other offer comes from a major international commodity trading house. It would provide a prepayment facility in exchange for 100% of Springbok's spodumene concentrate in its first three years of production. Neither offer is binding, and Lithium Africa aims to make a financing decision in the first half of 2027.

US Seabed Minerals: First Deep-Sea Lease Auction Scheduled

President Donald Trump's administration has scheduled the first US deep-sea mining lease auction for Nov. 19. It is offering 31 million acres of seabed off American Samoa despite opposition from environmental groups and local communities. The agency issued a Finding of No Significant Impact for commercial leasing offshore American Samoa on Oct. 19, 2026.

The Marine Minerals Administration said winning bidders will not have immediate permission to mine. Leases will initially allow preliminary activities like mapping, with exploration, testing and commercial production subject to a multi-stage regulatory approval process. The Natural Resources Defense Council said the administration received over 76,000 public comments on the proposal, the overwhelming majority opposed to it.

What It Means

Today's announcements show capital finding its way to projects, but on tougher terms. Copper World and Tiris were both sanctioned or advanced despite higher construction costs. Aclara's Penco study improved even with higher initial capital costs. Cornish's discounted raise shows the price some developers pay when a timetable slips and bondholders set deadlines.

A second theme is the growing role of governments and strategic partners in financing. Phoenix Tailings has a conditional loan commitment from the Office of Strategic Capital and state tax credits. Aclara is looking to the Export-Import Bank, and Aura is talking to the Development Finance Corporation. Glencore and Mitsubishi are doing the same job on the private side for Cornish and Copper World. The seabed auction is a reminder that supply-security policy also meets resistance, and that the approvals process can matter as much as the funding.

This roundup covers press releases published on October 21, 2026. Company announcements are sourced from mining industry wire services. For corrections or updates, contact contact@stakeandpaper.com.