Sediment properties in the upper part of the Hinlopen-Yermak landslide, northern Svalbard continental margin

摘要

The Hinlopen-Yermak Slide (HS) is one of the largest exposed submarine landslides on the world's continental margins, and is comparable in dimensions as well as slope failure processes to the Storegga Slide (SS). Index properties of the sediments from gravity cores retrieved from the upper slidescar area of the Hinlopen -Yermak Slide are analysed in this study. Sediment type, plasticity, activity, compressibility, undrained shear strength and remoulded undrained shear strength from fall cone tests are presented and compared with results from Storegga slide when possible. The available data illustrate that the sediments in the Hinlopen-Yermak Slide area are inorganic and inactive with low to medium plasticity. The compressibility is lower than that in the Storegga Slide, whereas the sensitivity is generally higher than those from similar locations in the Storegga Slide.