US Advances Offshore Critical Minerals Lease Plan Near American Samoa Despite Pacific Opposition

The U.S. Marine Minerals Administration (MMA) has released a Proposed Leasing Notice for a proposed mineral lease sale in federal waters off American Samoa as the Trump administration seeks to increase domestic supplies of minerals used in energy, defence and manufacturing.

The notice sets out the proposed terms and conditions for the sale but does not mean a lease sale will definitely take place or that any exploration or mineral collection activities will follow.

The proposal is part of the administration’s effort to strengthen U.S. critical mineral supply chains.

Acting MMA Director Matt Giacona said critical minerals have become strategically important as global competition grows, adding that China’s dominance in the supply of many of these materials poses risks to U.S. energy, defence and manufacturing industries.

“The Proposed Leasing Notice provides information on proposed sale terms and conditions so industry and other interested parties can engage with greater certainty,” Giacona said.

He added that any future lessee would be required to make every reasonable effort to hire American Samoans, use businesses in American Samoa and make use of the Port of Pago Pago.

The Proposed Leasing Notice, supporting documents and an Environmental Assessment have been published on the MMA’s website. A Notice of Availability will be published in the Federal Register on July 17, 2026.

The MMA said issuing the notice does not guarantee that a lease sale will be held. If the agency decides to move ahead, it must complete additional pre-sale steps, including publishing a final Leasing Notice in the Federal Register at least 30 days before any sale.

According to the proposal, the lease sale would include blocks under consideration, information for prospective lessees and proposed lease conditions.

Stipulations 10, 11 and 13 require the lessee to make every reasonable effort to hire local workers, use businesses in American Samoa and utilise the Port of Pago Pago.

The agency also said it has completed an Environmental Assessment examining the potential impacts of issuing two commercial leases in federal waters off American Samoa.

In a separate announcement, the MMA said it has published 16 new American Samoa Official Protraction Diagrams. These maps legally define leasing areas on the Outer Continental Shelf and show cadastral subdivisions used for offshore leasing.

The proposal has been criticised by Greenpeace USA, which said the administration was moving ahead with the world’s first commercial deep-sea mining lease sale despite opposition from Pacific communities and unanswered scientific questions.

Greenpeace said American Samoa has imposed a moratorium on seabed mining in its own waters and has formally opposed federal proposals to mine the Outer Continental Shelf near the territory.

The organisation also pointed to an April MMA document that outlined plans for lease sales in American Samoa in August 2026. According to Greenpeace, the document indicated that funding for tribal and Pacific Islands outreach would only come after the lease sales.

“The federal government is moving forward with a decision affecting Pacific communities before meaningful consultation has even begun – scheduling outreach after the lease sale, not before it,” said Arlo Hemphill, Greenpeace USA’s Oceans Are Life Campaign Lead.

Sabrina Suluai-Mahuka, founder of American Samoa’s Finafinau Foundation, said Pacific communities had made their opposition to deep-sea mining clear.

“Pacific people have made our position clear: we do not want deep sea mining in our waters. Yet the Trump administration is forcing this industry on our communities – imposing decisions that could affect us permanently without consulting us,” she said.

Greenpeace also said Guam and the Northern Mariana Islands, which were identified in MMA documents as possible future lease sale areas, have also opposed deep-sea mining proposals.

According to the group, both governors have recently called for a moratorium on deep-sea mining. It also said more than 3,000 residents from U.S. territories have signed petitions opposing the industry, while Guam’s governor signed a ban on deep-sea mining in nearshore waters under territorial control on June 5.

Solomon “Uncle Sol” Pili Kahoʻohalahala, a Native Hawaiian elder serving on the Papahānaumokuākea Marine National Monument Advisory Council and Native Hawaiian Cultural Working Group, said Indigenous leaders across the Pacific remain united in opposing deep-sea mining.

“The Pacific has already seen what happens when governments and corporations treat our ocean as something to exploit instead of a living system that sustains our people,” he said.

References: greenpeace, boem