Smear slide microscopy images of IODP Hole 386-M0088A@en

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. […]本数据集收录国际大洋发现计划（International Ocean Discovery Program, IODP）第386次航次（日本海沟古地震学研究航次）指定钻孔的涂片显微影像集。本次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，依托日本籍研究船‘海明号’（R/V Kaimei），往返航次始于并终于日本横须贺港。后续陆上作业阶段于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。海上阶段中，研究人员每间隔5米从岩芯段末端使用截尖注射器采集古生物样品，以此制备涂片玻片；陆上阶段则每间隔2米采集涂片玻片样品，用于补充岩芯目视描述观测结果，并识别细粒沉积物的组成成分。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，随后置于热板上蒸发干燥，再通过紫外光固化诺兰光学胶61号（Norland Optical Adhesive 61）完成封片。研究人员采用配备目镜测微尺的偏光岩相显微镜（蔡司Axio Imager A1m POL-1型）对沉积物的粒度与组成进行观测分析。除少数例外情况外，每块玻片均拍摄两张照片：一张采用单偏光模式，另一张采用正交偏光模式。[……]