Physical properties (MSCL) of IODP Hole 389-M0103A@en

Multi-Sensor Core Logger (MSCL) data (P-wave velocity, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR), gamma ray attenuation (GRA) density) from the above given hole of International Ocean Discovery Program (IODP) Expedition 389 (Hawaiian Drowned Reefs). 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 this expedition took place between 2023-08-31 and 2023-10-31 onboard multipurpose vessel MMA Valour sailing from and to Barbers Point Harbor, Hawai'i, USA. During expedition 389 offshore operations, the recovered cores were transferred from aluminum to plastic liners, thereby draining and to some extent further disturbing the core sections. Thus, partial fluid saturation and drilling-induced core damage on top of natural vugs and fractures common in carbonates and volcanic lava rocks negatively impacted the data quality. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. Note, in contrast to standard IODP syntax in this data set the depth value at the end of the sample label identifier, gives the depth in core. For instance, a sample label like 389-M0101B-19-2,126 identifies a measurement from 126 cm depth in core 19 (corresponding to section 2) within hole M0101B of expedition 389. […]本数据集包含国际大洋发现计划（International Ocean Discovery Program, IODP）第389次科考航次（夏威夷淹没礁航次）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、磁化率、自然伽马辐射（Natural Gamma Radiation, NGR）、非接触电阻率（Noncontact Resistivity, NCR）及伽马衰减密度（Gamma Ray Attenuation, GRA）。上述数据由本次航次近海科考阶段采用Geotek MSCL系统对完整圆柱形岩心段开展测量所得。本次航次的近海科考阶段于2023年8月31日至2023年10月31日期间开展，作业船舶为多用途船舶"MMA Valour"，往返于美国夏威夷巴伯斯角港。在第389次航次近海作业期间，回收的岩心从铝制衬管转移至塑料衬管，由此导致岩心内部流体被排出，并在一定程度上进一步扰动了岩心段。碳酸盐岩与火山熔岩中本就普遍存在天然孔洞与裂缝，加之部分流体饱和状态与钻井诱导的岩心损伤，进一步对数据质量造成了负面影响。伽马衰减密度、纵波速度、非接触电阻率及磁化率的测量采样间隔为2厘米，自然伽马辐射的测量采样间隔为10厘米。请注意，本数据集未遵循标准IODP格式规范：样品标签标识符末尾标注的深度数值，代表该样品的岩心内深度。例如，标签为389-M0101B-19-2,126的样品，代表第389次科考航次M0101B钻孔中，岩心段19（对应第2小节）内126厘米岩心深度处的测量数据。[...]