IODP Expedition 372A Bulk Density (GRA)

Gamma ray attenuation (GRA) data were acquired using a Cs-137 collimated source and a sodium iodide (thallium), or NaI(Tl), scintillation detector. The signal was calibrated using water and aluminum standards to provide a proxy for bulk density. This measurement was performed by a sensor mounted on either the Whole-Round Multisensor Logger (WRMSL) or the Special Task Multisensor Logger (STMSL); which track was used for a given data set is indicated in the data.

本数据集的伽马射线衰减（Gamma ray attenuation, GRA）数据通过铯-137（Cs-137）准直源与碘化钠（铊）[NaI(Tl)]闪烁探测器采集获取。信号以水和铝标准样品进行校准，以此作为体积密度的替代表征指标。该测量作业由搭载于全圆多传感器测井仪（Whole-Round Multisensor Logger, WRMSL）或特种任务多传感器测井仪（Special Task Multisensor Logger, STMSL）的传感器完成；每个数据集所采用的传感器搭载设备类型，将在数据集中明确标注。