Smear slide microscopy images of IODP Hole 386-M0087A

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（日本海沟古地震研究）指定钻孔的涂片显微镜影像集合。该航次的海上作业阶段于2021年4月13日至2021年6月1日期间在日本“海明”号科研调查船（R/V Kaimei）上开展，往返航次的起止港均为日本横须贺港。随后该航次于2022年2月14日至2022年3月15日期间，在“地球”号深海钻探船（D/V Chikyu）上完成陆上作业阶段。海上作业阶段中，科研人员每隔5米从岩心断面末端使用尖端切割式注射器采集古生物样本，并制备涂片玻片。陆上作业阶段则每隔2米采集涂片样本，以辅助岩心目视描述观测，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置于载玻片上，随后将载玻片置于热板上蒸发干燥，最后使用紫外光固化Norland光学胶61（Norland Optical Adhesive 61）完成封片。沉积物的粒径与组成通过搭载目镜测微尺的偏光岩石显微镜（Zeiss Axio Imager A1m POL-1）进行观测分析。除少数例外情况外，每张玻片均拍摄两张照片：一张为开偏光镜模式，另一张为正交偏光镜模式。[…]