Boron and geochemical data for seafloor sediments and altered oceanic crust from ODP Sites 1179, 1173, and DSDP Site 443

This dataset contains major and trace element compositions of seafloor sediments and altered oceanic crust (AOC) samples from ODP Sites 1179 and 1173 and DSDP Site 443 in the Pacific and Philippine Sea Plates. The dataset includes boron (B), Sm, and Gd concentrations determined by prompt gamma-ray analysis (PGA), together with major and additional trace element concentrations measured by X-ray fluorescence (XRF). Sample depths, lithological information, and associated geochemical data used for depth-integrated boron inventory calculations are included. These data were compiled for the study: Miyoshi, M., Sano, T., Hasenaka, T., Mori, Y., and Fukuoka, T.“Depth-integrated boron inventories of subducting oceanic plates: New insights from sediments and altered oceanic crust at ODP Sites 1179, 1173, and DSDP Site 443”accepted for publication in Geochemistry, Geophysics, Geosystems (G-Cubed). Major element compositions and concentrations of B, Sm, and Gd for AOC samples from Site 1179 were previously reported in Miyoshi et al. (2015) and are included here for comparison and completeness.