Cruise summary—Samoa Basin abyssal mapping—Box coring leg, Pago Pago, Territory of American Samoa to Pago Pago, American Samoa, April 11– May 1, 2026

Ferromanganese nodules and other ferromanganese coated rocks were collected using a box core from the Samoa Basin, during 2026-604-FA. This data release includes location and depth information for each box core sample, the abundance of ferromanganese minerals in each box core sample, in units of kilograms per square meter of seafloor, and geochemical data for representative samples. The...

Surface sediment samples were collected from the Samoan Basin, an abyssal region in the Pacific Ocean on expedition 2026-604-FA. This region is within the U.S. Exclusive Economic Zone (EEZ) offshore American Samoa. These samples were analyzed by portable X-ray fluorometry (XRF) to measure geochemical concentrations of major, minor, and some trace elements to determine if there was any...