Glomar and Cobalt Blue Target US Refinery for Seabed Mineral Processing

Why It Matters

If successful, the refinery would create a domestic source of nickel, manganese and copper, reducing U.S. reliance on foreign suppliers and demonstrating the viability of large‑scale deep‑sea mineral processing.

Key Takeaways

• 200k tonnes/year processing capacity planned
• Project cost estimated below $500 million
• Site decision expected first half 2026
• Commissioning targeted before 2029 US presidential term ends
• Commercial-scale nodule processing technology remains unproven

Pulse Analysis

The United States is intensifying its search for secure sources of critical minerals, and deep‑sea mining has emerged as a frontier solution. Nickel, manganese and copper—essential for electric vehicles, batteries and defense equipment—are abundant in polymetallic nodules scattered across the Clarion‑Clipperton Zone. By situating a processing facility on U.S. soil, Glomar and Cobalt Blue aim to align with recent policy initiatives that prioritize domestic supply chains and streamline permitting for offshore extraction projects.

At the heart of the proposal lies Cobalt Blue’s proprietary separation technology, which promises to extract multiple metals from a single nodule feedstock. While laboratory trials have shown promise, scaling the process to handle 200,000 tonnes annually remains unproven. Demonstrating economic viability at this scale would not only validate the technology but also lower the cost barrier for future deep‑sea ventures, potentially unlocking billions of dollars of investment in offshore mineral development.

Regulatory uncertainty adds another layer of complexity. The International Seabed Authority has yet to finalize a comprehensive framework for commercial mining, while U.S. agencies are moving to accelerate domestic approvals. The project's timeline—site selection by mid‑2026 and commissioning before 2029—reflects a strategic bet on favorable policy windows and the ability to secure private capital. Should the refinery come online on schedule, it could set a precedent for large‑scale seabed mineral processing, reshaping the global supply dynamics of critical metals.