Natural remanent magnetization data from IODP Hole 386-M0090B@en

Natural remanent magnetization (NRM) data 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, followed by an onshore phase onboard D/V Chikyu between 2022-02-14 – 2022-03-15. Because the diameter of the split section (12.5 cm) is larger than the magnetometer entrance (8.1 cm), U-channel samples were taken from the center of each working half during the onshore phase. Measurements were conducted likewise during the onshore phase using the long-core superconducting rock magnetometer (2G Enterprises, model 760) installed on D/V Chikyu. Due to time constraints paleomagnetism measurements were limited to NRM with 5 mT demagnetization, with measurements typically made at 2 cm intervals. Because linearity is difficult to calculate for short cores, such as trigger cores, corrections of declination were not performed for these cores. […]本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）第386航次（日本海沟古地震研究）指定钻孔的自然剩余磁化强度（Natural remanent magnetization, NRM）数据。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，搭载日本研究船"开阳丸"（R/V Kaimei），往返日本横须贺港；陆上作业阶段随后于2022年2月14日至2022年3月15日在"地球号"深海钻探船（D/V Chikyu）上完成。由于劈分岩芯段的直径（12.5 cm）大于磁力仪入口口径（8.1 cm），陆上作业阶段从每块半岩芯的中心部位采集U型槽岩芯样品（U-channel samples）。陆上作业阶段同样采用安装于"地球号"上的长岩芯超导岩石磁力仪（long-core superconducting rock magnetometer，2G Enterprises，型号760）开展测量工作。受时间限制，本次古地磁测量仅针对经5毫特斯拉（mT）退磁处理的自然剩余磁化强度，且测量采样间隔通常为2厘米。由于短岩芯（如触发式岩芯，trigger cores）的线性度难以计算，未对这类岩芯进行偏角校正。……