Crustal Architecture at the Collision Zone Between Rivera and North American Plates at the Jalisco Block: Tsujal Project
| العنوان: | Crustal Architecture at the Collision Zone Between Rivera and North American Plates at the Jalisco Block: Tsujal Project |
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| المؤلفون: | Juanjo Dañobeitia, Carlos Mortera, Modesto Ortiz, William Bandy, Diego Córdoba, Rafael Bartolomé, Francisco Nuñez-Cornu, Diana Nuñez, Arturo Castellón, José L. Alonso, Alejandra L. Cameselle, Manel Prada, Ferran Estrada |
| المساهمون: | Universidad Nacional Autónoma de México, Consejo Nacional de Ciencia y Tecnología (México), Gobierno del Estado de Jalisco, Consejo Superior de Investigaciones Científicas (España) |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Springer Science and Business Media LLC, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, North American Plate, Crust, Classification of discontinuities, Induced seismicity, 010502 geochemistry & geophysics, Block (meteorology), Collision zone, 01 natural sciences, Tectonics, Geophysics, Geochemistry and Petrology, Bathymetry, Geology, Seismology, 0105 earth and related environmental sciences |
| الوصف: | Dañobeitia, Juan José ... et al.-- Special issue Geodynamics of the Latin American Pacific Margin.-- 21 pages, 15 figures, 2 tables Processing and analysis of new multichannel seismic records, coincident with wide-angle seismic profiles, acquired in the framework of the TsuJal project allow us to investigate in detail the complex structure of the oceanic domain in the collision zone between Rivera Plate and Block Jalisco at its northern termination. The subducting Rivera Plate, which is overridden by the North American Plate–Jalisco Block, is clearly identified up to 21.5°N (just south of Maria Magdalena Island) as a two clear reflections that we interpret as the interplate and Moho discontinuities. North of the Tres Marias Islands the seismic images display a different tectonic scenario with structures that are consistent with large faulting and rifted margin. A two-dimensional velocity approach for the crustal geometry is achieved using joint refraction/reflection travel time tomography, the uncertainty of the results is assessed by means of Monte Carlo analysis. Our results show an average oceanic crustal thickness of 6–7 km with a moderate increase towards the Jalisco Block, an anomalous thick layers (~3.0 km) displaying a relatively low velocity (~5.5 km/s) underneath Maria Magdalena Rise, and an estimated Moho depth deeper than 15 km in the collision zone between Rivera Plate and Jalisco Block. We have also determined an anomalous crust on the western flank of the Tres Marias Islands, which may be related to the initial phases of continental breakup of the Baja California Peninsula and Mexico mainland. High-resolution bathymetry provides remarkable images of intensive slope instabilities marked by relatively large slides scars of more than 40 km2 extent, and mass-wasting deposits probably triggered by the intense seismicity in the area This research was supported by TSUJAL (Crustal characterization of the Rivera Plate–Jalisco Block boundary and its implications for seismic and tsunami hazard assessment, funded by the Spanish National Agency (Ref. CGL2011-29474-C02-01) and “Ramon y Cajal” program (R. Bartolome). The Government of Jalisco State has also funding for this project with various funds CONACYT–FOMIXJAL 2008–96567 (2009); CON- 848, CONACYT–FOMIXJAL 2008–96539 (2009); 849, CONACYT–FOMIXJAL 2010–149245 (2011); 850, CONACyT-FOMIXJal (2012-08-189963) and also 851, partial funding was provided by UNAM DGAPA 852 Grant #IN115513-3 and CABO Project JGAP2013,and UNAM DGAPA Grant #IN114602 |
| تدمد: | 1420-9136 0033-4553 2011-2947 |
| DOI: | 10.1007/s00024-016-1388-7 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16e383208d88bc8274d96b5590eccc81 https://doi.org/10.1007/s00024-016-1388-7 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....16e383208d88bc8274d96b5590eccc81 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14209136 00334553 20112947 |
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| DOI: | 10.1007/s00024-016-1388-7 |