Data/hora: 07/06/2024 03:46:25

Provedor de dados: 	5	
País: 	France	
Título: 	Morphology, distribution and origin of recent submarine landslides of the Ligurian Margin (North-western Mediterranean): some insights into geohazard assessment	
Autores: 	Migeon, Sebastien; Cattaneo, Antonio; Hassoun, Virginie; Larroque, Christophe; Corradi, Nicola; Fanucci, Francesco; Dano, Alexandre; De Lepinay, Bernard Mercier; Sage, Francoise; Gorini, Christian.	
Data: 	2011-03	
Ano: 	2011	
Palavras-chave: 	Ligurian Sea; Submarine landslides; Seafloor morphology; Seismic-reflection profiles; Side-scan sonar.	
Resumo: 	Based on new multibeam bathymetric data, seismic-reflection profiles and side-scan sonar images, a great number of submarine failures of various types and sizes was identified along the northern margin of the Ligurian Basin and characterized with 3 distinct end-members concerning their location on the margin, sedimentary processes and possible triggering mechanisms. They include superficial landslides mainly located in the vicinity of the main mountain-supplied rivers and on the inner walls of canyons (typically smaller that 10(8) m(3) in volume: Type 1), deep scars 100-500 m high along the base of the continental slope (Type 2), and large-scale scars and Mass Transport Deposits (MTDs) affecting the upper part of the slope (Type 3 failures). The MTDs are located in different environmental contexts of the margin, including the deep Var Sedimentary Ridge (VSR) and the upper part of the continental slope in the Gulf of Genova (Finale Slide and Portofino Slide), with volumes of missing sediment reaching up to 1.5 x 10(9) m(3). High sedimentation rates related to hyperpycnal flows, faults and earthquake activity, together with sea-level fluctuations are the main factors invoked to explain the distribution and sizes of these different failure types.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00043/15387/14028.pdf

DOI:10.1007/s11001-011-9123-3	
Editor: 	Springer	
Relação: 	http://archimer.ifremer.fr/doc/00043/15387/	
Formato: 	application/pdf	
Fonte: 	Marine Geophysical Research (0025-3235) (Springer), 2011-03 , Vol. 32 , N. 1-2 , P. 225-243	
Fonte: 	Springer Science+Business Media B.V. 2011