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Lefeldt, M.
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- PublicationOpen AccessThe Grosmarin experiment(2008-10)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Solarino, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Dessa, J. X.; UMR Geosciences Azur, Villefranche sur Mer, France ;Bethoux, N.; UMR Geosciences Azur, Villefranche sur Mer, France ;Beslier, M. O.; UMR Geosciences Azur, Villefranche sur Mer, France ;Hello, Y.; UMR Geosciences Azur, Villefranche sur Mer, France ;Anglade, A.; UMR Geosciences Azur, Villefranche sur Mer, France ;Desprez, O.; UMR Geosciences Azur, Villefranche sur Mer, France ;Ruiz Fernandez, M.; UMR Geosciences Azur, Villefranche sur Mer, France ;Manchuel, K.; UMR Geosciences Azur, Villefranche sur Mer, France ;Verdier, E.; UMR Geosciences Azur, Villefranche sur Mer, France ;Deschamps, A.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Courboulex, F.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Brunel, D.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Klingelhoefer, F.; Ifremer DRO/GM, Plouzané, France ;Bellier, O.; CEREGE, Aix-en-Provence, France ;Lefeldt, M.; IFM-GEOMAR, Kiel, Germany ;Flueh, E.; IFM-GEOMAR, Kiel, Germany ;Eva, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Eva, C.; Dipteris, Università di Genova, Italy ;Pavan, M.; Dipteris, Università di Genova, Italy ;Zunino, E.; Dipteris, Università di Genova, Italy ;Scafidi, D.; Dipteris, Università di Genova, Italy ;Spallarossa, D.; Dipteris, Università di Genova, Italy ;Ferretti, G.; Dipteris, Università di Genova, Italy; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Slejko, D.; OGS, TriesteThe GROSMARIN (which stands for GrandROSMARIN) cruise is proposed by UMR Géosciences Azur (with fellow french and italian research groups). Its goals are to better characterize active structures along this zone and to assess the resulting seismic hazard in a sort of continuation with respect to the MALISAR experiment, which has already surveyed some active structures through shallow observations. The GROSMARIN cruise is in fact the necessary counterpart to characterize them at depth.188 135 - PublicationOpen AccessVerso una migliore conoscenza delle strutture del margine Ligure: il progetto GROSMARIN(2008)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Dessa, J. X.; UMR Geosciences Azur Villefranche sur Mer, France ;Bethoux, N.; UMR Geosciences Azur Villefranche sur Mer, France ;Beslier, M. O.; UMR Geosciences Azur Villefranche sur Mer, France ;Hello, Y.; UMR Geosciences Azur Villefranche sur Mer, France ;Anglade, A.; UMR Geosciences Azur Villefranche sur Mer, France ;Desprez, O.; UMR Geosciences Azur Villefranche sur Mer, France ;Fernandez, M. R.; UMR Geosciences Azur Villefranche sur Mer, France ;Manchuel, K.; UMR Geosciences Azur Villefranche sur Mer, France ;Verdier, E.; UMR Geosciences Azur Villefranche sur Mer, France ;Deschamps, A.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Courboulex, F.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Brunel, D.; UMR Geosciences Azur, CNRS, Sophia Antipolis, France ;Klingelhoefer, F.; Ifremer DRO/GM, Plouzane, France ;Bellier, O.; CEREGE, Aix-en-Provence, France ;Lefeldt, M.; IFM-GEOMAR, Kiel, Germany ;Flueh, E.; IFM-GEOMAR, Kiel, Germany ;Solarino, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Eva, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Eva, C.; Dipteris, Università di Genova, Italy ;Pavan, M.; Dipteris, Università di Genova, Italy ;Zunino, E.; Dipteris, Università di Genova, Italy ;Scafidi, D.; Dipteris, Università di Genova, Italy ;Spallarossa, D.; Dipteris, Università di Genova, Italy ;Ferretti, G.; Dipteris, Università di Genova, Italy; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (English Abstract) The Ligurian margin, that is the junction area located between the Ligurian basin and the Southwestern Alps, is a passive margin, seismically active and subjected to gravitative movements. The active deformation in this sector is among the strongest ever experienced in Western Italy and Southern France. The current geodynamics of the basin is not completely understood yet, and somewhat under interest and debate of the scientific community. The latest results on the recent evolution of the Alps-Mediterranean system suggest that the area under study lay close to a domain under extension. The interest for the area is reinforced by its seismic activity that, although of low to moderate energy, acts in an area of high vulnerability. Some historical events involved in fact dramatic social and material damages. The growth of population (that now accounts for more than 2.500.000 inhabitants between Cannes and Genoa), the setting of numerous industries and the tourist business of the area are additional motivation for monitoring the area from the seismic point of view and especially to make specific studies on the seismogenic structures of this sector. Events with magnitude greater than 4.5 to 5.0 are in fact recorded every 5 years, but the area undergoes a rather weak microseismicity that often remains undetected and always poorly located by land seismic networks. The natural risks associated to this sector cannot neglect the presence of steep canyons that incise the offshore margin and favour gravitative slopes. The sediment masses accumulate on top of these canyons and may slip even after an earthquake of moderate magnitude. The GROSMARIN (which stands for GrandROSMARIN) cruise is proposed by UMR Géosciences Azur (with fellow french and italian research groups). It aims at (1) studying the microseismicity along a part of the northern margin of the Ligurian Basin, offshore France and Italy and (2) to realise a 3D tomography by wide-angle seismics. The goal is to better characterize active structures along this zone and to assess the resulting seismic hazard.248 231