Chemical compositions and Sr isotope ratios of bulk sediments and fish tooth samples in the pelagic area around Minamitorishima Island

This data set presents chemical compositions and Sr isotope ratios of bulk sediments and fish teeth taken from the piston and pilot cores, which were collected from the deep-sea basin around Minamitorishima Island, the western North Pacific. The cores were obtained during Cruises KR13-02, MR13-E02, MR14-E02, and MR15-E01 by R/Vs Kairei and Mirai. All the samples are categorized into pelagic clay or silty clay with variable amounts of biogenic Ca-phosphate and zeolite. Cores KR13-02 PC04, PC05, and PC06 contain one or two layers with >2000 ppm of total rare-earth elements and yttrium (REY) concentration, called “1st REY peak” and “2nd REY peak”. In addition, the pelagic clay samples in this area can be classified into five groups (Unit I to V), based on the chemical compositional characteristics (chemostratigraphy; Tanaka et al., 2020 Ore Geology Reviews). The sediment samples in this data set cover all the chemostratigraphic units (Unit I to V), the 1st and 2nd REY peaks.