Moisture and density (MAD) from IODP Hole 386-M0083C@en

Moisture and density (MAD) data from discrete samples from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). During the onshore phase of expedition 386, which took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu, discrete samples for MAD measurements (bulk density, dry density, grain density, water content, porosity, and void ratio) were taken from the work halves using 10 cubic centimetre syringes at an approx. down-core resolution of every 2 meters. Sampling depths were adapted and slightly modified for layers of special interest, such as tephras. Samples were processed and measured directly after sampling onboard Chikyu. For the measurements themselves samples were transferred to glass beakers of known weight and volume. […]本数据集涵盖国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学研究）指定钻孔的离散样品含水率与密度（Moisture and Density, MAD）测试数据。该航次作业阶段于2022年2月14日至2022年3月15日在"地球"号钻探船（D/V Chikyu）上开展。作业期间，以约每2米的岩芯垂向采样间隔，使用10立方厘米的注射器从岩芯工作半段中采集用于MAD测试的离散样品，测试指标包括体积密度、干密度、颗粒密度、含水率、孔隙度与孔隙比。针对火山灰层等特殊关注层位，采样深度进行了适配与小幅调整。样品在"地球"号钻探船上完成采样后，立即进行处理与测试。测试环节中，样品将被转移至已知重量与体积的玻璃烧杯中。[……]