Study Nearly Doubles Value, Lifts Resource For Aclara’s Penco Rare Earths Project

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Aclara Resources’ updated preliminary economic assessment puts the Penco rare earths project’s post-tax net present value at $344 million, nearly double the 2021 study’s estimate, while initial capital costs also roughly double to $244 million. The assessment adds three years to the projected mine life and reports a larger resource; a feasibility study is planned for the first quarter of 2027.

Aclara Resources’ updated preliminary economic assessment puts the post-tax net present value of its Penco rare earths project in Chile at $344 million, nearly twice the estimate in a 2021 study, while projecting initial capital costs of $244 million. The assessment also extends the planned open-pit mine life by three years, to 17 years, giving investors a revised view of the project’s potential economics before a feasibility study.

The new estimate uses an 8% discount rate, compared with 5% in the 2021 assessment. Aclara reported an internal rate of return of 26.1%, an increase of three percentage points from the earlier study. The company attributed the higher estimated value in part to a 55% increase in material processed, to 30.8 million tonnes, and higher forecast rare earth prices. These are study estimates, not realized project results.

The updated resource includes 35.8 million measured and indicated tonnes grading 2,095 parts per million total rare earth oxides (TREO), containing 75,025 tonnes of TREO. Aclara said contained rare earths in that category rose 19%. Inferred resources increased 29% to 2.2 million tonnes grading 1,768 ppm TREO, containing 3,848 tonnes of TREO, a 14% rise in contained material.

Average annual production is forecast at 732 tonnes of rare earth oxides, about 5% below the 2021 study’s forecast. Aclara says the product mix would include a rare earth carbonate rich in heavy rare earths, including dysprosium, terbium, yttrium and gadolinium. The company describes it as “super pure”; that characterization is Aclara’s wording, not an independently verified result in the study summary.

Higher Value, Higher Upfront Cost

The revised economics matter because Penco is a proposed source of heavy rare earths, materials used in applications including magnets and other advanced technologies. A larger estimated project value and longer mine life could strengthen Aclara’s case as it works toward a more advanced study and considers how the deposit might fit into a supply chain spanning South America and the United States.

The higher NPV does not remove the project’s financing and development risks. The estimate of $244 million in pre-production costs is also roughly double the capital figure reported for the 2021 study. The assessment therefore presents a larger projected value alongside a substantially higher upfront funding requirement. The estimates depend on study assumptions, including prices and production plans, and do not establish that the project will earn the forecast return.

For readers tracking rare earth supply, the project is relevant not only for its estimated output but for Aclara’s stated plan to connect mining with processing and manufacturing. That strategy remains dependent on further technical work, financing and construction at multiple sites; the Penco assessment alone does not confirm that an integrated supply chain will be completed.

Penco in Aclara’s Supply Plan

Penco is located about 430 kilometres south of Santiago. Aclara has described its deposits as rare earths held in relatively shallow ionic clays, which the company says can be mined without blasting, crushing or grinding. The project received its final environmental approval in June, following an approval process lasting more than four years, according to the source report.

Aclara’s broader plan links Penco and its Carina Module in Brazil with a proposed processing facility called Dynamo in Louisiana. Carina is in permitting, while construction at Dynamo is targeted to begin in early 2027. The company announced in September that the U.S. Export-Import Bank could provide up to $750 million toward Dynamo’s construction, subject to conditions; that potential support is not the same as confirmed project funding.

Aclara also operates a rare earth separation demonstration plant in Virginia. The company expects it to produce its first separated heavy rare earths in the fourth quarter of this year. Those plans provide context for Penco’s intended role, but the updated PEA concerns the Chilean project and does not by itself confirm the timing or commercial success of the other facilities.

“The Penco Module stands out for its significant heavy rare earth content, particularly dysprosium, terbium and yttrium, and its strategic location in one of Chile’s leading industrial regions.”

— Hugh Broadhurst, Aclara CEO

Costs, Prices and Project Delivery

The PEA is a preliminary study, and the reported NPV, capital cost and return are estimates based on assumptions rather than guarantees. The source material does not provide enough detail to assess the full sensitivity of the $344 million valuation to changes in rare earth prices, costs, schedule or other inputs. It is also not clear from the report how the higher capital estimate will be financed.

The project still needs a feasibility study, and development and construction remain ahead. Aclara’s proposed Louisiana facility, prospective U.S. government financing and planned integration with Brazilian supply are subject to their own conditions and schedules. The source does not establish that these elements will proceed on the timelines currently targeted.

Feasibility Study Targeted for 2027

Aclara plans to complete a feasibility study for Penco in the first quarter of 2027. That work should provide a more advanced basis for assessing engineering, costs, production plans and the project schedule. The company has said mine construction is expected to be completed in 2028, but the source does not give a construction start date or confirm that development financing is in place.

Investors and local stakeholders will also be watching for further details on project funding and the proposed link to downstream processing. The near-term milestones identified in the report are completion of the feasibility work and progress on Aclara’s other facilities; the timing and outcome of those steps remain subject to change.

Key Questions

What is the updated estimated value of Aclara’s Penco project?

Aclara’s updated PEA estimates a post-tax NPV of $344 million. It uses an 8% discount rate and is a preliminary estimate, not a realized valuation or guarantee of future returns.

How did the projected mine life and capital cost change?

The open-pit mine life increased by three years, to 17 years. The updated study estimates pre-production costs at $244 million; the source report says capital costs roughly doubled compared with the 2021 study.

What rare earths are expected from Penco?

Aclara’s production outlook includes a carbonate containing heavy rare earths such as dysprosium, terbium, yttrium and gadolinium. Average annual production is forecast at 732 tonnes of rare earth oxides, about 5% below the 2021 study’s forecast.

When could Penco move to construction?

Aclara plans to complete a feasibility study in Q1 2027 and has said mine construction is expected to be completed in 2028. The report does not confirm a construction start date or financing for the mine.

Is the proposed U.S. financing for Aclara’s Louisiana plant confirmed?

No. The source says the U.S. Export-Import Bank could provide up to $750 million toward the Dynamo plant, subject to conditions. It does not describe the amount as approved or received funding.

Source: rss