Imaging the crustal structure of the Central Iberian Zone (Variscan Belt): the ALCUDIA deep seismic reflection transect

Show simple item record Martínez Poyatos, David Jesús Carbonell, Ramón Palomeras, Inma Simancas Cabrera, José Fernando Ayarza Arribas, María Puy Martí, D. Azor Pérez, Antonio Jabaloy Sánchez, Antonio González Cuadra, Pablo Tejero López, Rosa Martín Parra, Luis Miguel Matas, Jerónimo González Lodeiro, Francisco Pérez-Estaún, Andrés García Lobón, José Luis Mansilla Plaza, Luis 2020-09-17T14:44:21Z 2020-09-17T14:44:21Z 2012-06-15
dc.identifier.citation Tectonics, vol.31, n.3, 1-21 es_ES
dc.identifier.issn 1944-9194
dc.description.abstract ALCUDIA is a 230 km long, vertical incidence deep seismic reflection transect acquired in spring 2007 across the southern Central Iberian Zone (part of the pre-Mesozoic Gondwana paleocontinent) of the Variscan Orogen of Spain. The carefully designed acquisition parameters resulted in a 20 s TWTT deep, 60–90 fold, high-resolution seismic reflection transect. The processed image shows a weakly reflective upper crust (the scarce reflectivity matching structures identified at surface), a thick, highly reflective and laminated lower crust, and a flat Moho located at 10 s TWTT ( 30 km depth). The transect can be divided into three segments with different structural styles in the lower crust. In the central segment, the lower crust is imaged by regular, horizontal and parallel reflectors, whereas in the northern and southern segments it displays oblique reflectors interpreted as an important thrust (north) and tectonic wedging involving the mantle (south). The ALCUDIA seismic image shows that in an intracontinental orogenic crust, far from the suture zones, the upper and lower crust may react differently to shortening in different sectors, which is taken as evidence for decoupling. The interpreted structures, as deduced from surface geology and the seismic image, show that deformation was distributed homogeneously in the upper crust, whereas it was concentrated in wedge/thrust structures at specific sectors in the lower crust. The seismic image also shows the location of late Variscan faults in spatial association with the lower crustal thickened areas es_ES
dc.description.sponsorship Departamento de Geodinámica, Universidad de Granada, España es_ES
dc.description.sponsorship Institut de Ciències de la Terra Jaume Almera, España es_ES
dc.description.sponsorship Department of Earth Science, Rice University, Estados Unidos es_ES
dc.description.sponsorship Departamento de Geología, Universidad de Salamanca, España es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Departamento de Geodinámica, Universidad Complutense de Madrid, España es_ES
dc.description.sponsorship Escuela Politécnica Universitaria de Almadén, Universidad de Castilla- La Mancha, España es_ES
dc.language.iso en es_ES
dc.publisher American Geophysical Union es_ES
dc.relation CGL2004-04623/BTE es_ES
dc.relation CGL2007-63101/BTE es_ES
dc.relation CGL2011-24101 es_ES
dc.relation CSD2006-00041 es_ES
dc.rights Acceso abierto es_ES
dc.subject Orogenia Varisca es_ES
dc.subject sísmica reflexión es_ES
dc.subject Meseta Ibérica es_ES
dc.subject desacoplamiento es_ES
dc.title Imaging the crustal structure of the Central Iberian Zone (Variscan Belt): the ALCUDIA deep seismic reflection transect es_ES
dc.type Postprint es_ES
dc.relation.publisherversion es_ES
dc.description.funder Ministerio de Ciencia e Innovación, España es_ES
dc.description.funder Junta de Castilla-La Mancha, España es_ES
dc.identifier.doi es_ES
dc.coverage.spatialStudy Alcudia, Mallorca, España es_ES

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


My Account