RT Journal Article
T1 Crustal architecture at the collision zone between rivera and north american plates at the Jalisco block: Tsujal project
A1 Dañobeitia, Juanjo
A1 Bartolomé, Rafael
A1 Prada, Manel
A1 Núñez Cornú, Francisco
A1 Córdoba Barba, Diego
A1 Bandy, William
A1 Estrada, F.
A1 Cameselle, Alejandra
A1 Núñez Escribano, Diana
A1 Castellón, Arturo
A1 Alonso, José Luis
A1 Mortera, Carlos
A1 Ortiz, Modesto
AB 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.
PB Springer
SN 0033-4553
YR 2016
FD 2016-09-08
LK https://hdl.handle.net/20.500.14352/92033
UL https://hdl.handle.net/20.500.14352/92033
LA eng
NO Dañobeitia, J., Bartolomé, R., Prada, M. et al. Crustal Architecture at the Collision Zone Between Rivera and North American Plates at the Jalisco Block: Tsujal Project. Pure Appl. Geophys. 173, 3553–3573 (2016)
NO Consejo Nacional de Ciencia y Tecnologίa (México)
NO Gobierno de España
NO Gobierno del Estado de Jalisco
NO Universidad Nacional Autonoma de Mexico
NO Agencia Estatal de Investigación (España)
NO Programa Ramón y Cajal
DS Docta Complutense
RD 6 abr 2025