Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)

Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)

16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle, 12-17 October 2014, Castelldefels, Barcelona.-- 1 page

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Main Authors: Martínez-Loriente, S., Gràcia, Eulàlia, Bartolomé, Rafael, Sallarès, Valentí, Perea, Héctor
Format: póster de congreso biblioteca
Published: 2014-10
Online Access:http://hdl.handle.net/10261/115053
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spelling dig-icm-es-10261-1150532019-10-03T07:11:18Z Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey) Martínez-Loriente, S. Gràcia, Eulàlia Bartolomé, Rafael Sallarès, Valentí Perea, Héctor 16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle, 12-17 October 2014, Castelldefels, Barcelona.-- 1 page In 2006 a Multichannel Seismic (MCS) survey was performed offshore the SW Iberian Margin, in the framework of the ESF-EuroMargins SWIM marine cruise. The main objective was to characterize the geometry, deep structure and timing of deformation of the active faults located at the westernmost Gulf of Cadiz. This region present significant seismicity as a consequence of the convergence (about 4-5 mm/yr) between the African and Eurasian Plates, and has been the site of several large magnitude earthquakes, such as the 1755 Lisbon Earthquake (Mw 8.5) and the 1969 Horseshoe Earthquake (Mw 8.0). A total of sixteen MCS profiles together with complementary swath-bathymetry and sub-bottom profiler data were acquired on board the Spanish RV Hesperides, totalizing more than 2700 km of data. The seismic source was an array of 8 airguns with a volume of 1050 c.i. We used an analogical Teledyne streamer with 2.4 km of active section, formed by 96 channels (25 m separation) and towed 7 m depth. MCS data were processed using PROMAX software, and 9 of the profiles were pre-stack depth migrated (PSDM) using velocity models built with the SIRIUS software. In contrast to time-sections, PSDM images display the real depth geometry of the structures, essential for a complete stratigraphic and tectonic interpretation, as well as to calculate fault seismic parameters of specific structures. The SWIM-2006 dataset reveal E-W trending dextral strike-slip faults showing surface deformation of flower-like structures predominate in the Horseshoe Abyssal Plain, whereas NE-SW trending compressive structures prevail in the Coral Patch Ridge and Seine Hills. The evaluation of the seismic potential of these active faults based on the calculation of their seismic parameters reveals that the newly mapped faults correspond to active blind thrusts and strike-slip faults that are able to generate large magnitude earthquakes (Mw 7.2–8.4) Peer Reviewed 2015-05-12T12:14:57Z 2015-05-12T12:14:57Z 2014-10 2015-05-12T12:14:57Z póster de congreso http://purl.org/coar/resource_type/c_6670 16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle. Abstracts: 125 (2014) http://hdl.handle.net/10261/115053 http://www.iplusdinnova.com/es/conference/16th-seismix-international-symposium none
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description 16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle, 12-17 October 2014, Castelldefels, Barcelona.-- 1 page
format póster de congreso
author Martínez-Loriente, S.
Gràcia, Eulàlia
Bartolomé, Rafael
Sallarès, Valentí
Perea, Héctor
spellingShingle Martínez-Loriente, S.
Gràcia, Eulàlia
Bartolomé, Rafael
Sallarès, Valentí
Perea, Héctor
Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
author_facet Martínez-Loriente, S.
Gràcia, Eulàlia
Bartolomé, Rafael
Sallarès, Valentí
Perea, Héctor
author_sort Martínez-Loriente, S.
title Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
title_short Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
title_full Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
title_fullStr Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
title_full_unstemmed Active tectonics in old oceanic lithosphere off SW Iberia based on pre-stack depth migrated mcs profiles (SWIM-2006 Survey)
title_sort active tectonics in old oceanic lithosphere off sw iberia based on pre-stack depth migrated mcs profiles (swim-2006 survey)
publishDate 2014-10
url http://hdl.handle.net/10261/115053
work_keys_str_mv AT martinezlorientes activetectonicsinoldoceaniclithosphereoffswiberiabasedonprestackdepthmigratedmcsprofilesswim2006survey
AT graciaeulalia activetectonicsinoldoceaniclithosphereoffswiberiabasedonprestackdepthmigratedmcsprofilesswim2006survey
AT bartolomerafael activetectonicsinoldoceaniclithosphereoffswiberiabasedonprestackdepthmigratedmcsprofilesswim2006survey
AT sallaresvalenti activetectonicsinoldoceaniclithosphereoffswiberiabasedonprestackdepthmigratedmcsprofilesswim2006survey
AT pereahector activetectonicsinoldoceaniclithosphereoffswiberiabasedonprestackdepthmigratedmcsprofilesswim2006survey
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