Mozambique’s Monte Muambe rare earth project has cleared another development hurdle, with a U.S. company selected to lead a $1.875 million pre-feasibility study backed by the U.S. government.
The appointment moves the project closer to a potential mining decision—but Monte Muambe is still years and several major steps away from production.
NeoTerra Group, the London-listed critical minerals company behind the project, announced the appointment through the London Stock Exchange on August 20, 2026.
U.S. firm Valentine Enterprises will lead the study, working with SGS North America and New Dominion Consulting.
The appointment remains subject to final approval from the U.S. Trade and Development Agency (USTDA), which is funding the work.
What happens next?
NeoTerra expects the study to start in September with a project kick-off meeting followed by a site visit to Monte Muambe in Tete province, northwestern Mozambique.
A limited drilling programme is also planned to obtain representative samples from the deposit.
Those samples will be used to investigate one of the project’s biggest unanswered questions:
Can Monte Muambe’s rare earth minerals be extracted and processed economically at commercial scale?
The pre-feasibility study will examine:
- Mineral extraction and processing methods
- Metallurgical performance
- Mine-development costs
- Processing requirements
- Technical risks
- Commercial viability
The work follows a $1.875 million USTDA grant awarded in February.
Who will conduct the study?
Valentine Enterprises will coordinate the overall pre-feasibility programme and manage the specialist firms involved.
SGS North America will contribute expertise in areas including mineral analysis, metallurgy, process engineering and project development.
New Dominion Consulting will focus on areas such as supply chains, sustainability, procurement and operations.
NeoTerra CEO Cedric Simonet said the three companies were selected because of their technical capabilities and understanding of U.S. supply chains.
The study is expected to provide a substantially more detailed assessment than the project’s earlier 2023 scoping study.
But there is an important distinction.
A pre-feasibility study is not a construction decision.
NeoTerra would still need additional engineering and environmental work, financing and a final investment decision before construction could begin.
The company has not yet provided a confirmed production date.
You might want to read this: Namibia Terminates $2.4 Million AI Agriculture Contract
The U.S. grant was approved months ago
The latest announcement represents the selection of the contractor, rather than a new funding commitment.
Washington first signalled its support for Monte Muambe on February 8, during discussions focused on U.S. backing for critical-mineral projects in sub-Saharan Africa.
NeoTerra, which was then operating as Altona Rare Earths, disclosed the development the following day.
USTDA subsequently signed the $1.875 million grant agreement with Monte Muambe Mining Ltda, NeoTerra’s Mozambican subsidiary, on February 27.
The agency then opened a competitive process for qualified U.S. companies to undertake the study. The proposal deadline was later extended to May 11 before Valentine Enterprises and its partners were selected.
NeoTerra changed its name from Altona Rare Earths to NeoTerra Group in June 2026, reflecting its broader focus on critical minerals including rare earths, fluorspar, gallium, copper and silver.
What is Monte Muambe worth?
Monte Muambe is located in Moatize district in Tete province, Mozambique’s principal coal-producing region.
NeoTerra’s current mineral-resource estimate stands at 13.6 million tonnes grading 2.42% total rare earth oxides.
That estimate was prepared under the JORC reporting standard, an established framework used in the mining industry to classify and report mineral resources.
The deposit contains neodymium and praseodymium, two rare earth elements particularly important for high-performance permanent magnets.
Those magnets are used in technologies including:
- Electric vehicles
- Wind turbines
- Electronics
- Industrial machinery
The project also contains heavier rare earth elements such as dysprosium and terbium.
These materials can improve the high-temperature performance of permanent magnets, making them particularly valuable in electric motors and certain defence applications.
A $276 million mine is only a preliminary plan
NeoTerra’s October 2023 scoping study estimated that developing Monte Muambe would require approximately $276.3 million in initial capital.
The preliminary concept envisaged:
- An open-pit mine
- Processing capacity of about 750,000 tonnes of ore per year
- Average production of approximately 15,000 tonnes of mixed rare earth carbonate annually
- An estimated 18-year mine life
At the scoping stage, NeoTerra calculated a post-tax net present value of $283.3 million, an internal rate of return of 25% and a projected 2.5-year payback period from the beginning of production.
Those numbers should not be treated as final project economics.
They were based on an early-stage study and assumptions that can change as more drilling, metallurgical testing, engineering and economic analysis are completed.
The new pre-feasibility study is designed to test those assumptions.
The eventual mine size, capital requirement, production profile and financial returns could therefore differ significantly from the 2023 estimates.
Why Washington is interested
The U.S. government’s involvement reflects a much larger strategic problem: Washington wants alternative sources of critical minerals outside China.
China produced approximately 270,000 tonnes of rare-earth oxide equivalent in 2025, compared with about 51,000 tonnes from the United States, according to U.S. Geological Survey figures cited by the Congressional Research Service.
But production is only part of the story.
China also has a dominant position in rare-earth processing and permanent-magnet manufacturing, giving it considerable influence over the downstream supply chain.
That has become a strategic concern for Washington because rare-earth magnets are used across civilian and military industries, including electric vehicles, renewable-energy equipment, electronics and advanced defence systems.
China introduced export controls covering seven heavy rare earth elements in April 2025 and subsequently expanded restrictions to additional materials.
Those measures have increased pressure on the United States and its allies to develop alternative sources.
Monte Muambe fits into a wider U.S. strategy
The project is not an isolated American investment in African critical minerals.
Washington is also supporting other projects on the continent, including the Longonjo rare earth project in Angola and the Phalaborwa project in South Africa.
Monte Muambe could eventually give Mozambique a role in a supply chain designed to reduce reliance on Chinese sources.
But that outcome is far from guaranteed.
USTDA’s $1.875 million grant pays for technical studies—not mine construction.
It does not guarantee that Monte Muambe will be developed, nor does it constitute an agreement to purchase the project’s future production.
For now, the immediate objective is much narrower:
Determine whether Mozambique’s rare earth deposit can become a technically viable and commercially competitive mine.
If the pre-feasibility study delivers a positive answer, Monte Muambe will move closer to the next stage. But the road from exploration to production remains long—and the new study is only the next step.