August 21, 2026 — The federal government has taken its clearest step yet toward opening the seabed near the Northern Mariana Islands to commercial mineral mining, and Guam’s governor and delegate to Congress are warning Washington not to move faster than the science allows.
The Marine Minerals Administration, formed in July when the Interior Department folded the Bureau of Ocean Energy Management into a new agency, published a proposed leasing notice Monday covering five lease blocks along the edge of the Mariana Trench. The blocks span roughly 67 million acres, an area close to the size of Nevada, and the agency has set Dec. 16 as the proposed date for the sale.
In a statement released Wednesday, Gov. Lou Leon Guerrero’s office acknowledged Washington’s interest in reducing reliance on foreign mineral sources but said caution should come first. “National security cannot mean asking the people of the Pacific to accept environmental risks before those risks are fully understood,” the statement said.
The governor’s office cautioned that permitting exploration now could make it harder to pull back later, once companies have invested money in surveying the seabed. “A lease is not authorization to begin commercial mining, and it is important that we be precise about that. But it is also not an insignificant step,” the statement said, calling on the Interior Department and the new marine minerals agency to consult with residents of the Mariana Islands before going further.