Shear strength (handheld penetrometer) from IODP Hole 386-M0084F

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

国际大洋发现计划（IODP）第386航次（日本海沟古地震学）中上述钻孔的手持式贯入仪剪切强度数据。该数据集于2022年11月15日至11月30日在“地球”号钻探船（D/V Chikyu）上开展的第386航次第三阶段（个人取样组，PSP）的岩心处理流程末期获取。使用配备10毫米直径探头的手持式（袖珍型）贯入仪，对岩心剖面的工作半块进行测量。探头以测量针朝下的方式垂直于岩心劈分表面推入6.3毫米，直至探头上标记的凹槽与岩心表面齐平。从设备读取所得阻力（抗压强度），并用于计算不排水剪切强度。在每个测量深度进行三次测量，取所得不排水剪切强度的平均值。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. 等人2023年发表的方法章节：https://doi.org/10.14379/iodp.proc.386.102.2023