South Korea Makes Its Move: POSCO Targets Brazil's Caldeira as the Rare Earth Chessboard Shifts

Highlights

• POSCO International signed a non-binding MOU with Meteoric Resources to negotiate long-term rare earth supply from Brazil's Caldeira ionic clay deposit.
• The agreement includes potential equity investment and broader partnership, with intermediate products to be refined into separated rare earth oxides for Korean and global magnet makers.
• The deal reflects a broader geopolitical race among industrial buyers to move upstream and secure critical mineral feedstock outside Chinese supply chains.
• Rare Earth Exchanges notes the MOU is not a binding offtake or financing commitment, and true strategic advantage requires controlling the full mine-to-magnet value chain.

POSCO International (opens in a new tab) has signed an MOU with Meteoric Resources (opens in a new tab) (ASX: MEI) to negotiate a long-term supply agreement, potential equity investment, and broader partnership around the Caldeira rare earth project in Brazil. The announcement validates growing international interest in one of the world's most closely watched ionic clay rare earth deposits. Rare Earth Exchanges® has previously covered Meteoric's quarterly results and interviewed its CFO Andy Thompson (opens in a new tab), making this development a notable strategic milestone. While the agreement is non-binding, it underscores a broader global race to secure non-Chinese rare earth supply chains—and highlights that downstream processing remains the true strategic battleground.

Another Strategic Vote of Confidence

The global scramble for rare earth security just gained another influential participant.

South Korea's POSCO International has signed a memorandum of understanding with Australia's Meteoric Resources to negotiate long-term supply from the Caldeira Project in Brazil, alongside potential equity participation and broader project cooperation. According to POSCO, intermediate products from Caldeira would be refined into separated rare earth oxides before supplying permanent magnet manufacturers in Korea and international markets.

For Rare Earth Exchanges readers, this is familiar territory. We recently analyzed Meteoric's quarterly results and hosted the company's CFO, who outlined Caldeira's development strategy and its ambition to become a major Western rare earth supplier.

Beyond the Headlines Lies the Real Strategy

The announcement accurately reflects a strategic partnership—but investors should recognize what it is not. An MOU is a framework for negotiation, not a binding offtake agreement or financing commitment. The larger signal, however, is unmistakable. Industrial buyers are increasingly moving upstream to secure future feedstock as geopolitical risk reshapes critical mineral procurement.

Yet the article leaves one major point underdeveloped. Securing ore or intermediate products is only part of the equation. Sustainable competitive advantage depends on separation capacity, metal production, alloy manufacturing, and permanent magnet fabrication.

In Great Powers Era 2.0™, supply security belongs not to those who own the rocks—but to those who control the entire mine-to-magnet value chain. POSCO appears to understand that distinction, and Caldeira continues to attract precisely the kind of strategic partners that could help reshape the non-Chinese rare earth ecosystem.