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Título

Tsujal Project: New Geophysical Studies about Rivera PLATE and Jalisco Block (Mexico)

Autor Barba, Diego; Dañobeitia, Juan José ; Bartolomé, Rafael ; Cameselle, Alejandra L. ; Prada, Manel ; Ortiz, Modesto
Fecha de publicación 15-dic-2014
EditorAmerican Geophysical Union
Citación 2014 AGU Fall Meeting (2014)
ResumenDuring spring and summer of 2014, it has been carried out the first geophysical fieldwork of the project entitled “Crustal characterization of the Rivera Plate-Jalisco Block boundary and its implications for seismic and tsunami hazard assessment (TSUJAL)”. This is project is the result of a wide scientific collaboration between institutions of Mexico and Spain with the main aim of studying the lithospheric structure in Rivera and North American Plates convergence regions and Jalisco Block, and, also, identifying submarine structures that could be tsunamigenic sources. The first phase of this project was carried out in February and March of 2014. More than 5200 km of Multichannel Seismic Reflection (MCS) data were acquired, together with multibeam and parametric soundings and potential fields (gravity and magnetism) data. Wide Angle profiling were recorded deploying 16 OBS in 32 locations, offshore Jalisco and Nayarit regions Onshore, a network of 100 short period seismic portable stations were deployed in 240 locations along 5 seismic lines of 200-300 km length that worked combined with Seismological Network of Jalisco State (SisVOc). In addition, 8 land seismic stations were installed in Marías Islands and Isabel Island. These instruments registered, in continuous mode, the source energy was generated by big airgun array of 5800 ci, shooting every 120 s. The British vessel RRS James Cook, which participated in this project as a part of the exchange program between Spanish and English scientific vessels, was responsible of carrying out the MCS profiles and the deployment of OBS. For them, it was used a 6 km length digital streamer and airgun array of high capacity. Moreover, the ARM Holzinger and RV El Puma participated in this project and were provided by the Mexican Navy and UNAM, respectively. The second phase of this project was carried out in June 2014. 100 short period seismic stations were installed along one seismic profile from La Caldera de la Primavera (Guadalajara) to Barra de Navidad (Jalisco coast), covering 200 km distance. The new data acquired during TSUJAL project provide a dense sampling of studied plates and give new seismic images about continental deformation along and across the subduction zone, accretionary wedge size, about contact between Rivera and North American Plates
Descripción Barba, Diego ... et. al.-- 2014 American Geophysical Union Fall Meeting, 15-19 december 2014, San Francisco
Versión del editorhttps://agu.confex.com/agu/fm14/meetingapp.cgi#Paper/10090
URI http://hdl.handle.net/10261/115251
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