Shear strength (handheld penetrometer) from IODP Hole 386-M0084B

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. […]

国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学）指定钻孔的手持贯入仪剪切强度数据集。本数据集采集于该航次第三阶段（个人采样分队，Personal Sampling Party, PSP）的岩心处理流程末期，该航次于2022年11月15日至2022年11月30日期间在D/V Chikyu号钻探船上开展。测量采用配备10mm直径探头的手持（袖珍）贯入仪，在岩心段的工作半块上进行：将测量针朝下，垂直于劈开的岩心表面推进探头6.3mm，直至探头上的刻槽与岩心表面齐平。读取设备显示的阻力（抗压强度），并据此计算不排水剪切强度。每个测量深度均开展三次测量，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偏差，则团队将通过重复测量验证结果。[…]