Shear strength (handheld penetrometer) from IODP Hole 386-M0089B

Shear strength from handheld penetrometer of the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). This dataset was obtained at the end of the core processing workflow during the third phase (Personal Sampling Party, PSP) of expedition 386, which took place between 2022-11-15 – 2022-11-30 onboard D/V Chikyu. Measurements were performed on the work halves of core sections using a handheld (pocket) penetrometer equipped with a 10 mm diameter tip. The tip was pushed 6.3 mm perpendicular to the split core surface with the measuring pin downward until the groove marked on the tip was even with the level of the core surface. The resulting resistance (compressive strength) was read from the device and used to calculate undrained shear strength. At each measurement depth, three measurements were conducted and the resulting undrained shear strength averaged. In the case of major discrepancies between the three measurements, the team verified the results by repeating the measurements.For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

国际海洋发现计划（International Ocean Discovery Program，IODP）386航次（日本海沟古地震学）上述钻孔的手持贯入仪剪切强度数据。该数据集获取于386航次第三阶段（个人采样组，Personal Sampling Party，PSP）岩心处理流程末期，采样工作于2022年11月15日至2022年11月30日期间在地球号钻探船（D/V Chikyu）上开展。使用配备直径10毫米探头的手持（袖珍型）贯入仪，对岩心断面的工作半块进行测量。将探头以测量针朝下的方式垂直于岩心劈分面推入6.3毫米，直至探头上标记的凹槽与岩心表面齐平。从仪器读取所得阻力（抗压强度），并用于计算不排水剪切强度。在每个测量深度处进行三次测量，并对所得不排水剪切强度取平均值。若三次测量结果存在显著差异，团队将通过重复测量验证结果。更多方法学信息请参见Strasser, M.等（2023）的方法章节，DOI：https://doi.org/10.14379/iodp.proc.386.102.2023。