Mineral major element compositions of samples from IODP Site U1601, North Atlantic Ocean

Mineral major element compositions of olivine, orthopyroxene and clinopyroxene in ultramafic samples (peridotites and pyroxenites) taken from drill core recovered from IODP Site U1601 on the Atlantis Massif (Mid-Atlantic Ridge) during IODP Expedition 399 (https://iodp3.org/expedition/399/). A total of 117 samples were selected to cover the full 1268 m depth of Hole U1601C as well as its lithological and textural variability. The data document the mineral major- and minor element composition as measured by EDS-SEM in thin section, or, in the case of samples with an MBIO suffix, polished billets.