IODP Expedition 391 P-wave velocity caliper (section/discrete)

P-wave velocity data were measured on undisturbed section halves (JRSO-defined x-axis) and/or discrete cube and cylinder samples (x, y, or z-axis) using pairs of piezoelectric transducers mounted on a caliper system. Report includes P-wave velocity in x, y, and/or z-direction, caliper separation, traveltime between transucers, and first arrival picks.本数据集通过安装于卡尺系统（caliper system）上的成对压电换能器（piezoelectric transducers），对以JRSO定义的x轴为基准的未受扰动岩心段半块，以及沿x、y或z轴方向的离散立方体、圆柱体试样开展纵波速度（P-wave velocity）测试。本次报告涵盖沿x、y和/或z方向的纵波速度、卡尺间距、换能器间传播时间以及初至拾取（first arrival picks）结果。