2024-03-29T01:56:08Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1410822018-07-10T10:30:18Zcom_10261_82com_10261_8col_10261_335
Diaz, J.
Gallart Muset, Josep
Carbonell, Ramón
2016-12-02T08:35:32Z
2016-12-02T08:35:32Z
2016-12
Tectonophysics,692A: 74-85 (2016)
0040-1951
http://hdl.handle.net/10261/141082
10.1016/j.tecto.2016.08.023
1879-3266
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100002809
http://dx.doi.org/10.13039/501100001871
http://dx.doi.org/10.13039/501100001665
The complex tectonic interaction processes between the European and African plates at the Western Mediterranean have left marked imprints in the crustal architecture of this area, particularly concerning the lateral variations in crustal thicknesses. The detailed mapping of such variations is hence of large interest, as it provides a major constraint to geophysical and geodynamic modeling at different scales. Controlled-source seismic profiling and receiver functions from natural seismicity are widely considered as major tools to constrain Moho topography. We compile here the Moho depths determined from a comprehensive number of both types of seismic surveys, to end up with a new 3D Moho depth map of the Iberian Peninsula, its continental margins and North Morocco. Since the 1970s, the lithospheric structure beneath this study area has been extensively investigated using multichannel normal incidence seismic reflection and refraction/wide-angle reflection profiling. In the last few years some high-resolution surveys at sea and inland have been acquired, the latter ones involving ~. 1000 land stations. On the other hand, the TopoIberia-IberArray experiment has triggered the investigations on crustal and lithospheric structure using natural seismicity, providing a homogeneous spatial resolution never achieved before. The availability of good quality results from both methodologies in a common area provides an excellent opportunity to check the consistency of the Moho depth estimations. The integration of both datasets has resulted in a new, high resolution map of the crustal thickness variations. The final grid evidences large Moho topography variations, including crustal imbrication in the Pyrenean range, a large and relatively undisturbed Variscan Massif in the center of Iberia and a probable delamination process beneath the Gibraltar Arc. The crustal thicknesses vary from ~. 15. km in continental margins up to values exceeding 50. km beneath the Pyrenees or the Rif Cordillera. © 2016.
eng
openAccess
Crustal thickness
Deep Seismic Sounding
Iberia-Western Mediterranean region
Receiver functions
Moho topography beneath the Iberian-Western Mediterranean region mapped from controlled-source and natural seismicity surveys
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