Smear slide microscopy images of IODP Hole 386-M0089D

Collection of smear slide microscopy images 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. With a few exceptions, one photo with open and one with crossed nicol prisms was taken of each slide.For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

本数据集包含来自国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震研究）指定钻孔的涂片玻片显微图像集合。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，作业船为日本籍“海明号”（R/V Kaimei），往返航次始于并终于日本横须贺港。随后于2022年2月14日至2022年3月15日期间，在“地球号”（D/V Chikyu）钻探船上完成陆上作业阶段。海上作业阶段中，研究人员每5米从岩心段末端使用尖端切除式注射器采集古生物样品，并制备涂片玻片。陆上作业阶段中，研究人员每2米采集涂片样品，以补充岩心目视描述的观测内容，并识别细粒沉积物的组成成分。涂片玻片的制备流程为：取少量沉积物与蒸馏水混合后滴加至载玻片上，随后将载玻片置于热板上烘干，最后使用紫外光固化诺兰光学胶61号（Norland Optical Adhesive 61）封装干燥后的样品。沉积物粒度与组成通过配备目镜测微尺的偏光岩相显微镜（蔡司Axio Imager A1m POL-1）进行观测。除少数例外情况外，每张玻片均拍摄两张照片：一张为单偏光下图像，另一张为正交偏光镜下图像。更多方法学细节可参见Strasser M.等人2023年发表的研究论文中的方法章节，链接：https://doi.org/10.14379/iodp.proc.386.102.2023