Foraminifera occurrences of IODP Hole 386-M0093A

Results of Foraminifera assemblage analyses from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan, followed by an onshore phase onboard D/V Chikyu between 2022-02-14 – 2022-03-15. During the offshore phase, micropaleontology samples were taken from the end of split cores at 5 m intervals. During the onshore phase approximately 2 cubic centimetres of sediment from each of these samples were analysed for foraminifera. After drying overnight in a ~40°C oven, samples were disaggregated in a solution of deionized water, Calgon, and H2O2 to ensure removal of clay-sized particles. Samples were then wet sieved through a 63 μm mesh sieve and rinsed with deionized water. The coarse fraction was placed on filter paper in an oven at ~40°C until it dried completely. Faunal identifications were made using a Meiji Techno RZ binocular light microscope. Taxonomic composition, abundance, and preservation state were observed in the >63 μm size fraction.For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）386次航次（日本海沟古地震学）指定钻孔的有孔虫组合（Foraminifera assemblage）分析结果。本航次包含两个作业阶段：海上作业阶段于2021年4月13日至2021年6月1日期间在日本R/V Kaimei号研究船上开展，往返于日本横须贺港；陆上作业阶段于2022年2月14日至2022年3月15日在D/V Chikyu号钻探船上完成。海上作业阶段，以5米间隔从劈分岩芯的末端采集微古生物学（micropaleontology）样品；陆上作业阶段，从每份上述样品中取约2立方厘米沉积物开展有孔虫分析。样品先置于约40℃烘箱中过夜干燥，随后置于去离子水、Calgon与过氧化氢的混合溶液中分散，以去除黏土级颗粒；之后将样品通过63 μm孔径筛网湿筛，并用去离子水冲洗。将筛上粗组分置于滤纸上，在约40℃烘箱中完全烘干。使用明技（Meiji Techno）RZ型双目光学显微镜开展有孔虫群落鉴定，针对>63 μm粒级组分记录其分类组成、丰度及保存状态。更多方法学细节可参见Strasser M.等人2023年发表的《IODP Proceedings》第386卷第102章，链接：https://doi.org/10.14379/iodp.proc.386.102.2023