IODP Expedition 359 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.本数据集涵盖伽马射线衰减（Gamma ray attenuation）数据，采集过程采用铯-137（Cs-137）准直源与碘化钠（铊）[NaI(Tl)]闪烁探测器。实验以水和铝作为标准样品对采集信号进行校准，以此作为体积密度的替代表征参数。该测量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；针对某一特定数据集所采用的设备型号，将在数据集中明确标注。