Physical properties (MSCL) of IODP Hole 386-M0081B@en

Multi-Sensor Core Logger (MSCL) data (P-wave velocity, gamma ray attenuation (GRA) density, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR)) from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). These data were obtained from whole round core sections by means of a Geotek MSCL during the offshore phase of the expedition. The offshore phase of expedition 386 took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. As the aforementioned parameters are sensitive to temperature core sections were stored for at least 6 hours after arrival on deck before measurement to allow for temperature equilibration. The core physical properties were measured at predetermined optimal instrument-based spatial and temporal sampling intervals. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）386次科考航次（日本海沟古地震学）指定钻孔的多传感器岩心记录仪（Multi-Sensor Core Logger, MSCL）数据，涵盖纵波速度、伽马射线衰减（GRA）密度、磁化率、自然伽马辐射（NGR）与非接触电阻率（NCR）。上述数据由航次近海作业阶段采用Geotek MSCL对完整圆形岩心段采集得到。本次386航次的近海作业于2021年4月13日至2021年6月1日间开展，作业船舶为日本“海明”号（R/V Kaimei），往返于日本横须贺港。由于前述参数对温度敏感，岩心段在抵达甲板后需至少静置6小时以完成温度平衡，方可开展测量。岩心物理性质的采样按照预先确定的基于仪器的最优空间与时间采样间隔进行：纵波速度、GRA密度、NCR与磁化率的采样间距为2 cm，自然伽马辐射（NGR）的采样间距为10 cm。如需进一步了解方法细节，请参阅Strasser M.等人2023年发表的《IODP Proceedings 386》方法章节，链接：https://doi.org/10.14379/iodp.proc.386.102.2023