USA Rare Earth’s Serra Verde Deal Signals Strategic Push to Secure Critical Minerals Supply Chain
The United States is intensifying efforts to reduce dependence on foreign sources for critical minerals essential to clean energy, defense, and advanced manufacturing. A pivotal development in this strategy is USA Rare Earth’s recent agreement to acquire a controlling stake in Brazil’s Serra Verde rare earth project. This move underscores America’s broader push to establish a secure, domestic-friendly supply chain for materials like neodymium and praseodymium — key components in electric vehicle motors, wind turbines, and military systems.
Understanding the Serra Verde Project and Its Strategic Value
Located in Brazil’s Minas Gerais state, the Serra Verde project is one of the world’s most significant ion-adsorption clay rare earth deposits outside of China. Unlike hard-rock mining, ion-adsorption clays allow for a less environmentally disruptive extraction process using ammonium sulfate leaching, which can be more easily managed and rehabilitated.
The project is particularly rich in heavy rare earth elements (HREEs) such as dysprosium and terbium, which are vital for enhancing the thermal stability of permanent magnets used in high-performance applications. While light rare earths (LREEs) like neodymium and praseodymium are more abundant globally, HREEs are far scarcer and predominantly controlled by China, which processes over 90% of the world’s rare earth supply.
USA Rare Earth, a New York-based company focused on developing a fully integrated rare earth supply chain in the United States, announced in early 2024 that it had entered into a definitive agreement to acquire up to 70% of Serra Verde through its subsidiary. The deal includes provisions for off-take rights and technical collaboration aimed at developing processing capacity in the U.S.
Why This Deal Matters for U.S. National and Economic Security
The Serra Verde acquisition aligns with multiple federal initiatives designed to fortify critical mineral supply chains. In 2022, the Biden administration invoked the Defense Production Act to fund domestic mining and processing projects, allocating hundreds of millions of dollars through the Department of Energy (DOE) and the Department of Defense (DoD). The goal is to reduce vulnerability to supply disruptions, particularly those stemming from geopolitical tensions with China.
According to the U.S. Geological Survey (USGS), the United States relies entirely on imports for its rare earth compounds and metals, with China supplying approximately 74% of those imports between 2019 and 2022. Any disruption — whether due to trade restrictions, export quotas, or logistical bottlenecks — could severely impact industries ranging from renewable energy to aerospace.
By securing access to Serra Verde, USA Rare Earth aims to establish a pipeline of raw material that can be processed at its planned facility in Stillwater, Oklahoma. The company has received federal funding support, including a $35 million grant from the DOE’s Office of Manufacturing and Energy Supply Chains (MESC) in 2023 to develop magnet recycling and separation technologies.
Environmental and Technical Advantages of Ion-Adsorption Clays
One of the reasons Serra Verde stands out is the nature of its deposit. Ion-adsorption clays rare earths are bound to the surface of clay particles rather than locked within mineral crystals. This allows for extraction using relatively mild chemical solutions, reducing energy consumption and toxic byproduct generation compared to traditional hard-rock mining.
Studies published in journals such as Resources Policy and Journal of Cleaner Production have highlighted the lower carbon footprint and reduced waste output associated with clay-based rare earth extraction when properly managed. Serra Verde’s developers have emphasized their commitment to sustainable practices, including water recycling and reforestation of mined areas.
Nonetheless, environmental monitoring remains critical. Independent oversight by Brazilian regulatory agencies such as IBAMA (Brazilian Institute of Environment and Renewable Natural Resources) will be essential to ensure compliance with local and international standards.
Broader Context: America’s Critical Minerals Strategy
The Serra Verde deal is part of a larger trend. In recent years, the U.S. Has sought to diversify its critical mineral sources through partnerships with allied nations. The Minerals Security Partnership (MSP), launched in 2022 by the State Department and now comprising over a dozen countries including Australia, Canada, Japan, and the European Union, aims to catalyze investment in responsible mineral projects worldwide.
the Inflation Reduction Act of 2022 includes provisions that link electric vehicle tax credits to domestic sourcing of battery components and critical minerals — creating a strong economic incentive for companies to localize supply chains.
Other moves include investments in Australian rare earth producer Lynas Corporation, support for MP Materials’ Mountain Pass mine in California (the only rare earth mining and processing facility in the Western Hemisphere), and funding for recycling initiatives aimed at recovering rare earths from end-of-life electronics and magnets.
Challenges Ahead: From Mine to Magnet
Despite the promise of the Serra Verde deal, significant hurdles remain. Turning raw rare earth concentrate into separated oxides and ultimately into functional metals and alloys requires sophisticated chemical processing — expertise that has largely atrophied in the United States over the past two decades.
USA Rare Earth has acknowledged this gap and is pursuing a phased approach: first securing concentrate from Serra Verde, then developing separation capacity in Oklahoma, and eventually producing finished magnet materials. The company has partnered with firms like General Motors to explore off-take agreements for magnet alloys, signaling interest from major industrial consumers.
Timing is also a concern. While the Serra Verde project is advancing through permitting and feasibility stages, full-scale production is not expected before 2026–2027. In the interim, the U.S. Will continue to rely on existing supply chains, underscoring the demand for near-term solutions like stockpiling and recycling.
Conclusion: A Foundational Step Toward Supply Chain Resilience
USA Rare Earth’s investment in the Serra Verde project represents more than a corporate acquisition — it is a strategic component of America’s effort to rebuild critical industrial capabilities. By accessing a high-quality, environmentally favorable rare earth resource in a democratic ally nation, the U.S. Gains a valuable foothold in the global race for clean energy dominance.
While no single project can eliminate dependence on foreign processing, deals like this one — combined with domestic investment, technological innovation, and international cooperation — lay the groundwork for a more resilient, secure, and sustainable critical minerals supply chain. As the world transitions to electrified transportation and renewable energy, the ability to control the materials that make that transition possible will be as vital as the technologies themselves.
Frequently Asked Questions
What are rare earth elements and why are they key?
Rare earth elements are a group of 17 metallic elements crucial for manufacturing high-tech products. Despite their name, they are relatively abundant in the Earth’s crust but rarely found in concentrated, economically viable deposits. They are essential for permanent magnets, catalysts, phosphors, and alloys used in electric vehicles, wind turbines, smartphones, and defense systems.
Does the U.S. Have any rare earth mines currently operating?
Yes. MP Materials operates the Mountain Pass mine in California, which is the only rare earth mining and processing facility in the Western Hemisphere. It primarily extracts light rare earths and has begun expanding into separation capabilities with federal support.
How does ion-adsorption clay mining differ from traditional rare earth mining?
Ion-adsorption clay deposits allow rare earths to be extracted using liquid solutions that wash the ions from clay surfaces, avoiding the need for crushing and high-temperature smelting. This method typically uses less energy and produces less radioactive waste than hard-rock mining, though it requires careful chemical management.
Is the Serra Verde project environmentally safe?
The project’s developers state that it uses a low-impact extraction method and includes plans for water treatment, waste management, and land rehabilitation. However, final environmental approvals depend on ongoing review by Brazilian authorities and adherence to best practices in monitoring and mitigation.
When will the U.S. Begin processing rare earths from Serra Verde?
USA Rare Earth plans to develop processing capacity at its Stillwater, Oklahoma facility, with initial operations expected in the mid-to-late 2020s. The timeline depends on permitting, construction, and successful scale-up of separation technology.