(Table 1) Framework-grain composition of ODP Leg 125 sediment samples@en

This report presents petrographic data that will be used to characterize spatial and temporal changes in the provenance of Izu-Bonin forearc sediments recovered during Ocean Drilling Program Leg 125. These data document the history of the Izu-Bonin arc system as reflected in the framework mineralogy of supra-subduction zone sediments. Subsequent analysis will reveal the record of arc-splitting events as well as the spatial and temporal episodes in forearc volcanism, in source type, and in source area that are preserved in these sediments.本报告展示一套岩石学数据，该数据将用于表征大洋钻探计划（Ocean Drilling Program）第125航次采获的伊豆-小笠原弧前沉积物的物源时空变化特征。这套数据记录了伊豆-小笠原弧系的演化历史，其信息可通过俯冲带上方沉积物的骨架矿物学特征得以反映。后续分析将揭示弧分裂事件的相关记录，以及保存在这些沉积物中的弧前火山作用、物源类型与物源区的时空演化过程。