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Origin of shallow submarine mass movements and their glide planes-Sedimentological and geotechnical analyses from the continental slope off northern Norway ArchiMer
Baeten, Nicole J.; Laberg, Jan Sverre; Vanneste, Maarten; Forsberg, Carl Fredrik; Kvalstad, Tore J.; Forwick, Matthias; Vorren, Tore O.; Haflidason, Haflidi.
Submarine landslides are often characterized by a basal surface of rupture parallel to the stratigraphy, in which downslope movement is initiated. However, little is known about the sedimentology and physical properties of the sediments within these surfaces. In this study, we present a multiproxy analysis of the sediments collected from a giant piston core penetrating a shallow submarine mass transport deposit, in combination with high-resolution seismoacoustic data to identify and characterize the basal glide plane and the weaker sediments in which movement was initiated. The initial phase of instability consists of a single fracture that formed due to the downslope movement of a mostly intact slab of sediments. The 16m long core, comprising mostly...
Tipo: Text Palavras-chave: Mass movement; Glide plane; Sedimentary processes; Geotechnical analysis; Seafloor stability; Hazard potential.
Ano: 2014 URL:
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