US Seabed Auction Near American Samoa Advances Mineral Leasing Despite Weak Mining Economics

On November 19, the US Marine Minerals Administration is scheduled to auction mineral rights covering about 31.5 million acres of seabed near American Samoa. The two areas have minimum bids of $3 million apiece, with 20-year lease terms. It is an impressive area and a modest opening price for a prospective new metals industry. The difference between the two numbers helps explain what the sale is actually offering.

The winning bidder will acquire a position from which to study mineral deposits and seek subsequent permissions. The government has said explicitly that an issued lease does not authorize commercial harvesting. It allows preliminary work such as mapping, while physical exploration, testing and mining require additional plans and approvals. The lease does not establish reserves, a collector that can work for years, a processing plant or buyers willing to pay enough for the metals.

The announcement is being treated as an American critical-minerals milestone. Investors should pay close attention to the difference between a government auction and an operating mining project. A mineral lease can have speculative value long before a profitable business exists.

In my new TFIE Strategy Briefing on the American Samoa auction, I examine how federal leasing can advance while the integrated business case remains weak.

The acreage has no direct relationship to the amount of commercially recoverable metal. The final federal notice describes northern and southern areas of roughly 16.3 million and 15.2 million acres. They are regulatory boundaries. A mining company needs deposit-grade and abundance data, continuity, recoverable tonnage, processing recoveries and a market price that leaves a margin after all the offshore and downstream costs.

The geology is becoming better understood. In April 2026, US Geological Survey scientists deployed 38 box cores in the Samoa Basin, of which 36 yielded enough material for nodule-density measurements. The expedition report is useful new evidence about the region. It is an expedition summary rather than a reserve statement for either lease area. Mineral distributions vary within the sampled region, and the better-studied Clarion-Clipperton Zone is not an adequate substitute for American Samoa’s own geological evidence.

Collection creates another set of costs. Impossible Metals proposes autonomous vehicles that select nodules and return to a support vessel. The Metals Company uses a more mature crawler-and-riser approach that has demonstrated recovery at pilot scale. Both must turn offshore demonstrations into dependable annual production, with maintenance, ship time, recovery systems and delays included. Their technologies should not be assigned the same engineering maturity, but neither has proved a profitable integrated mining-and-processing business.

In 2025, metallurgical engineer Lyle Trytten and I completed an independent techno-economic assessment commissioned by the National Ocean Protection Coalition. We examined both collection approaches, offshore operations, processing, metal markets and financial sensitivities. We judged commercial viability within the following 15 years highly unlikely. A new leasing process has not supplied the operating and financial evidence that was missing in that assessment.

The history of first-of-a-kind offshore production should influence the financing. Nautilus Minerals spent substantial capital on its Solwara-1 venture without reaching commercial production. Deep-sea mining depends on specialized machines, ships, handling systems, processing capacity and sales contracts working in sequence. The first production years of comparable projects are rarely smooth. The lease is one of the cheapest and earliest commitments in that chain.

American Samoa also has its own decision to make. Its government has supported scientific investigation while withholding support for commercial extraction at present. A lawsuit filed by Samoan chiefs and community groups contests the federal process. The resulting legal and territorial questions matter alongside engineering and economics. The environmental finding for preliminary leasing activities is not a finding about the effects of a future commercial mine.

Auction results will show what qualified bidders will pay for an opportunity. A winning bid can justify a company’s further studies and improve its fundraising story. An operating business will require years of capital investment, production evidence and profitable metal sales. Those are much harder milestones, and they remain ahead of the bidders.

Read A Seabed Lease Does Not Fix a Broken Business Case for the full assessment of the auction, and the Barnard–Trytten report for the underlying engineering and financial analysis.