Shear strength (shear vane) from IODP Hole 386-M0082A@en

Shear strength from automated shear vane (AVS) 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 Wykeham-Farrance AVS. The apparatus consists of four vanes perpendicular to each other that are inserted in the sediment to their full length while attempting to minimize disturbance to the sediment. A motor loads a helical torsion spring and the bottom of the spring is united to the vane. Therefore, the bottom deflection of the spring records the angular displacement of the sediment, from which undrained shear strength has been calculated. Measurements were attempted approx. every 2 m throughout the core, though, some lithologies, especially in the upper few meters were too soft to obtain reasonable results. These core depths are blank in the Shear strength [kPa] column of the presented dataset. […]本数据集包含国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学研究）指定钻孔的自动十字板剪切仪（automated shear vane, AVS）测试抗剪强度结果。该数据采集于386航次第三阶段（个人采样队，Personal Sampling Party, PSP）岩心处理流程的收尾阶段，该阶段航次于2022年11月15日至2022年11月30日期间在"地球"号（D/V Chikyu）科考船上实施。测试采用Wykeham-Farrance型自动十字板剪切仪，在岩心半片工作样上完成测量。该设备包含四片相互垂直的十字板，将其完全插入沉积物内以最大限度降低对沉积物的扰动。电机驱动螺旋扭转弹簧加载，弹簧下端与十字板相连。因此，弹簧下端的挠度可记录沉积物的角位移，据此可计算得到沉积物的不排水抗剪强度。本次测试尝试在整个岩心中以约2米的间隔进行，但部分岩性（尤其上部数米的沉积物）过于松软，无法获取可靠测试结果。因此，本数据集的抗剪强度[kPa]列中，对应岩心深度的单元格留空……