Smear slide descriptions of IODP Hole 386-M0085D

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.

国际海洋发现计划（IODP）386号探险（日本海沟古地震学）中上述钻孔的涂片描述。该探险的海上阶段于2021年4月13日至6月1日在日本“海明”号科考船（R/V Kaimei）上开展，往返于日本横滨港；随后于2022年2月14日至3月15日在“地球”号钻探船（D/V Chikyu）上进行陆上阶段工作。海上阶段期间，每隔5米从岩心段末端通过尖端切割注射器采集古生物学样本，并制备涂片；陆上阶段则每隔2米采集涂片样本，以补充岩心目视描述观测结果并明确细粒沉积物的成分。涂片制备流程如下：取少量沉积物置于载玻片，加入蒸馏水混合；随后将载玻片置于加热板上蒸发，干燥后的样本采用紫外线固化的诺兰光学粘合剂61（Norland Optical Adhesive 61）固定。沉积物的粒度与成分通过配备目镜测微尺（ocular micrometer）的偏光岩相显微镜（polarized light petrographic microscope）（蔡司Axio Imager A1m POL-1）进行观测分析。