Foraminifera occurrences of IODP Hole 386-M0095B

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航次（日本海沟古地震学）指定钻孔的有孔虫组合分析结果。该航次的海上作业阶段于2021年4月13日至2021年6月1日期间开展，搭载日本"开明号"（R/V Kaimei）调查船往返于日本横须贺港；随后的陆上作业阶段于2022年2月14日至2022年3月15日期间在"地球号"（D/V Chikyu）钻探船上完成。海上作业阶段，研究人员以5米为间隔，从劈开岩心的末端采集微古生物学样品；陆上作业阶段，则从每份上述样品中取约2立方厘米的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（H₂O₂）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孔径湿筛筛分，并用去离子水冲洗。将筛得的粗粒级组分置于滤纸上，再次放入约40℃的烘箱中直至完全干燥。研究人员使用明技（Meiji Techno）RZ型双目光学显微镜完成类群鉴定，对＞63 μm粒级组分的分类组成、丰度与保存状态进行观测。如需获取更多实验方法细节，请参阅Strasser M等人2023年发表的相关研究成果中的方法章节：https://doi.org/10.14379/iodp.proc.386.102.2023