IODP Expedition 396 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，GRA）数据，采用铯-137（Cs-137）准直源与碘化钠（铊）[sodium iodide (thallium)，缩写为NaI(Tl)]闪烁探测器采集获取。信号通过水与铝标准物质完成校准，以作为体积密度的替代表征量。该测量由搭载于全环绕多传感器测井仪（Whole-Round Multisensor Logger，WRMSL）或专用任务多传感器测井仪（Special Task Multisensor Logger，STMSL）的传感器实施；针对每个数据集所采用的搭载仪器类型，已在数据中注明。