Smear slide descriptions of IODP Hole 386-M0081F

Descriptions of smear slides 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. This was followed by an onshore phase onboard D/V Chikyu between 2022-02-14 – 2022-03-15. During the offshore phase, smear slides were prepared from paleontology samples collected with a tip-cut syringe from section ends every 5 m. During the onshore phase, smear slides samples were collected every 2 m to complement visual core description observations and identify the composition of fine-grained sediment. The smear slides were prepared by putting a small amount of sediment on a glass slide mixed with distilled water. The slide was subsequently evaporated on a hot plate, and the dried sample was mounted in Norland Optical Adhesive 61 using ultraviolet light. Sediment grain size and composition were examined under a polarized light petrographic microscope (Zeiss Axio Imager A1m POL-1) with an ocular micrometer.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（日本海沟古地震学研究）指定钻孔的沉积物涂片玻片（smear slide）描述资料。该航次的海上勘探阶段于2021年4月13日至2021年6月1日期间开展，作业平台为日本籍科考船“开明号”（R/V Kaimei），往返航次均以日本横须贺港为起止点。此后，该航次陆上勘探阶段于2022年2月14日至2022年3月15日在“地球号”（D/V Chikyu）钻探船上完成。
海上勘探阶段中，研究人员每间隔5米从岩心段末端使用切尖注射器采集古生物样本，并制备沉积物涂片玻片。陆上勘探阶段则每间隔2米采集涂片玻片样本，以补充岩心目视描述所需的观测资料，并识别细粒沉积物的组成成分。
沉积物涂片玻片的制备流程如下：取少量沉积物与蒸馏水混合后滴加至载玻片上，随后置于热板上蒸干样品，再使用紫外光固化的Norland Optical Adhesive 61胶进行封片。研究人员采用搭载目镜测微尺的偏光岩相显微镜（Zeiss Axio Imager A1m POL-1）对沉积物的粒度与组成进行镜下检测分析。
如需获取进一步的实验方法细节，请参阅Strasser M.等学者2023年发表于《国际大洋发现计划进展报告386》的方法章节，链接：https://doi.org/10.14379/iodp.proc.386.102.2023