The Trump administration plan to auction deep sea mining leases for 28m hectares of seafloor near the Northern Mariana Islands and Guam has drawn sharp opposition from local Pacific leaders, who warn of unquantified environmental risks to marine ecosystems and local economies, according to the Marine Mineral Administration and territorial officials.
Pacific Territories Push Back Against U.S. Seafloor Leases
According to the Marine Mineral Administration (MMA), an agency under the U.S. Department of the Interior, a proposal released on Tuesday aims to auction deep sea mining leases for 28m hectares (69m acres) of seafloor off the Northern Mariana Islands and Guam. The leases target polymetallic nodules containing critical minerals like copper, cobalt, manganese, and nickel, which the Trump administration says are needed for batteries, electronics, and defense technologies to counter China’s growing influence. However, local leaders have questioned the timeline and safety of the push. According to the Northern Marianas governor, David Apatang, his government will approach the proposal with extreme caution and ensure no activity occurs without rigorous scientific baseline studies and explicit protections. In Guam, Lieutenant Governor Joshua Tenorio told the Guardian that his administration is unequivocally opposed to the effort, stating that national security cannot mean asking Pacific communities to accept unverified environmental risks.
Did you know? Polymetallic nodules are potato-sized rocks that carpet parts of the deep ocean floor, formed over millions of years from the remains of sunken shark teeth and shells, and contain high grades of manganese, copper, nickel, and cobalt.
Legal Challenges and International Law Concerns
According to reporting by Radio Free Asia (RFA), legal experts warn that unilateral U.S. actions on deep sea mining in international waters would likely violate international law, as the U.S. has not ratified the 1982 U.N. Convention on the Law of the Sea. Duncan Currie, an international lawyer advising conservation groups, testified to Congress that throwing out established rules is hazardous and could weaken U.S. legitimacy in enforcing other maritime principles like freedom of navigation. Meanwhile, companies such as Nasdaq-traded The Metals Company (TMC) have sought permits under the U.S. umbrella to bypass the International Seabed Authority (ISA). According to RFA, TMC chief executive Gerard Barron defended the company’s partnerships with Pacific nations like Tonga and Nauru, arguing they were let down by a lack of performance at the ISA.
American Samoa Seafloor Auction and Environmental Lawsuits
The Marianas lease notice follows a separate process initiated weeks earlier for 12.4m hectares (31m acres) of seafloor around American Samoa, with contracts slated to be awarded in November, according to government files. American Samoa Governor Nikolau Pula voiced opposition to the plan, noting that untested extraction processes could damage the territory’s vital tuna industry. On August 19, environmental groups including Fa’asao Ameika Samoa and the Conservation Council for Hawaii filed a lawsuit in a Hawaii court to halt the American Samoa auction. According to court filings cited by the Guardian, the groups alleged that federal agencies failed to evaluate how extraction machinery can destroy seafloor life, stir up toxic sediments, and introduce loud noises that harm marine mammals.
Frequently Asked Questions
What minerals are targeted by the U.S. deep sea mining leases?
According to federal proposals, the leases target polymetallic nodules containing critical minerals such as copper, cobalt, manganese, and nickel used in batteries, electronics, and defense technologies.
How have local Pacific leaders responded to the mining plans?
Leaders in the Northern Mariana Islands, Guam, and American Samoa have expressed strong opposition or extreme caution, citing potential threats to local marine ecosystems, regional fisheries, and a lack of rigorous scientific baseline studies.
What is the International Seabed Authority’s role?
The International Seabed Authority (ISA) is a U.N. organization mandated to set rules by consensus for deep sea mining in international waters, designating the minerals for the shared benefit of all humankind, though some companies are attempting to bypass its oversight.
Pro Tip: Stay informed on shifting maritime regulations by tracking updates directly from federal agencies like the Department of the Interior and regional territorial offices.
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