Seismic structure of the seismogenic Rivera plate subduction by multichannel reflection imaging (western mexican margin)
| Autor: | Bartolomé, Rafael, Górriz Ibáñez, Estefanía, Dañobeitia, Juan José, Córdoba, Diego, Martí, David, Cameselle, Alejandra L., Nuñez-Cornu, Francisco, Bandy, William, Mortera-Gutierrez, Carlos, Nuñez, Diana |
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| Rok vydání: | 2017 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Subduction Interface Processes Meeting (SIP), An International Conference Zooming On Subduction Zones, 18-21 April 2017, Barcelona During the TSUJAL marine geophysical survey, conducted in February and March 2014 Spanish, Mexican and British scientists and technicians explored the western margin of Mexico, a region with high occurrence of large earthquakes (> Mw= 7.5) and tsunami generation. This work presents the internal structure of the subduction zone of the Rivera plate beneath the North American plate in the offshore part of the Jalisco Block imaged by mean of multichannel reflection seismic data, to link the recent tectonic deformation occurring there with the possible generation of tsunamis and earthquakes. For this purpose, it has been carried out acquisition, processing and geological interpretation of a multichannel seismic reflection profile running perpendicular to the margin. The western part of the profile shows an oceanic domain, dominated by subduction-accretion along the lower slope of the margin with a subparallel sediment thickness of up to 1.6 s two way travel time (approx. 2 km) in the Middle American Trench, and the top of the oceanic crust (intraplate reflector) is very well imaged. This reflector is almost continuous along the profile with a gentle dip ( |
| Databáze: | OpenAIRE |
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