Smear slide microscopy images of IODP Hole 386-M0090D

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. […]本数据集包含国际大洋发现计划（International Ocean Discovery Program, IODP）386次科考航次（日本海沟古地震学研究）指定钻孔的涂抹片（smear slide）显微图像。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，在日本籍科考船“开阳丸（R/V Kaimei）”上开展，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，研究人员每隔5米从岩芯段端部使用尖端切割式注射器采集古生物样品，并制备涂抹片。陆上作业阶段则每隔2米采集涂抹片样品，以辅助岩芯目视描述观测，并识别细粒沉积物的组分。涂抹片的制备流程为：取少量沉积物与蒸馏水混合后滴涂于载玻片上，随后将载玻片置于加热板上烘干，再使用紫外光固化诺兰光学胶61（Norland Optical Adhesive 61）对干燥后的样品进行封片。研究人员借助搭载目镜测微尺的偏光岩相显微镜（蔡司Axio Imager A1m POL-1）对沉积物的粒径与组分进行观测。除少数例外情况外，每张涂抹片均拍摄两张照片，分别采用单偏光模式与正交偏光模式。[…]