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http://hdl.handle.net/2445/205413
Title: | Development and Emplacement of Ana Slide, Eivissa Channel, Western Mediterranean Sea |
Author: | Lastras Membrive, Galderic Canals Artigas, Miquel Sager, Thore F. Urlaub, Morelia Kamisnki, Pauline Papenberg, Cord Berndt, Christian |
Keywords: | Mediterrània (Mar) Eivissa (Illes Balears) Geologia submarina Esllavissades Mediterranean Sea Ibiza (Balearic Islands) Submarine geology Landslides |
Issue Date: | 1-Nov-2022 |
Publisher: | Wiley |
Abstract: | Submarine landslides can destroy seafloor infrastructures and generate devastating tsunamis. In spite of decades of research into the functioning of submarine landslides there are still numerous open questions, in particular how different phases of sliding influence each other. Here, we re-analyze Ana Slide—a relatively small (<1 km3) landslide offshore the Balearic Islands, which is unique in the published literature because it is completely imaged by high-resolution 3D reflection seismic data. Ana Slide comprises three domains: (a) a source area that is almost completely evacuated with evidence of headscarp retrogression, (b) an adjacent downslope translational domain representing a by-pass zone for the material that was mobilized in the source area, and (c) the deposit formed by the mobilized material, which accumulated downslope in a sink area and deformed slope sediment. Isochron maps show deep chaotic seismic units underneath the thickest deposits. We infer that the rapid deposition of the landslide material deformed the underlying sediments. A thin stratified sediment unit between three lobes suggests that Ana Slide evolved in two failure stages separated by several tens of thousands of years. This illustrates the problem of over-estimating the volume of mobilized material and under-estimating the complexity even of relatively simple slope failures without high-quality 3D reflection seismic data. |
Note: | Reproducció del document publicat a: https://doi.org/10.1029/2022GC010469 |
It is part of: | Geochemistry, Geophysics, Geosystems, 2022, vol. 23, num.11 |
URI: | http://hdl.handle.net/2445/205413 |
Related resource: | https://doi.org/10.1029/2022GC010469 |
ISSN: | 1525-2027 |
Appears in Collections: | Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) |
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