Paleo-Tsunami por deslizamientos submarinos en márgenes glaciaresel caso del abanico glacial de Storfjorden (SO del Archipiélago Svalbard)
- M.T. Pedrosa-González 1
- G. Ercilla 2
- J. Galindo-Zaldivar 1
- J.M González-Vida 3
- S. Ortega-Acosta 3
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1
Universidad de Granada
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- 2 Dpto. Geosciènces Marines (ICM-CSIC)
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3
Universidad de Málaga
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ISSN: 1576-5172
Year of publication: 2021
Issue Title: X Congreso Geológico de España
Issue: 18
Pages: 767
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The Storfjorden Trough Mouth Fan is affected by a huge submarine landslide mapped based on multibeam bathymetry and very high-resolution seismic profiles. The Storfjorden landslide covers an area of 1200 km2 with a volume of 40 km3. The Landslide-HySEA numerical modelling has simulated the hypothetical tsunami (Gonzalez-Vida et al., 2019). The model rela- ted landslide evidences the presence of two interacting sediment volumes, which are slumping simultaneously. Wave trains values are one meter with N-S propagation direction and run-up value ~ 2m in Spitsbergen and Bear Islands. Sedimentary instability would be related to i) the interplay between the over-steeping of the continental slope (4º), ii) the high sedimen- tation rates of clays during interglacial periods, which are intercalated with glaciogenic sediments deposited during the glacial periods building a stratigraphy with over-consolidated clay levels, iii) and the seismic activity (Faleide et al, 1996). It contributes to increase the knowledge and the evaluation about the potential tsunamigenic of submarine landslides in similar scenarios, where the environmental changes by impact of climatic changes may favour submarine landslide triggering.