Transferencia activa durante la exhumación de la rama norte del orógeno Bético-Rifeño
- J.M. Azañón 1
- V. Pérez-Peña 1
- F. Giaconia 2
- J. Rodríguez-Fernández 2
- G. Booth 1
- J.M. Martínez-Martínez 1
- F.J. Roldán 3
- M. della Seta 4
- A. Azor 1
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1
Universidad de Granada
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- 2 Instituto Andaluz de Ciencias de la Tierra (UGR-CSIC)
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3
Instituto Geológico y Minero de España
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- 4 Università deglio Studi di Roma "La Sapienza"
ISSN: 1576-5172
Any de publicació: 2012
Títol de l'exemplar: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.
Número: 13
Pàgines: 1567-1570
Tipus: Article
Altres publicacions en: Geotemas (Madrid)
Resum
The collision between the Alboran crustal domain and the South Iberian and North African paleomargins, during the Miocene, produced the underthrusting of a crustal block (Nevado-Filabride complex) to more than 45 km depth. The exhumation of this block took place between 16 and 12 Ma in the eastern Betics, with denudational rates of 10 km/Ma. These processes were coeval to the development of an accretionary wedge and sedimentary basins with an intricate compartmentalization that manifest the deformation partitioning in a context of oblique collision. The Miocene NW-SE convergent rates between Africa and Europe do not justify these continental subduction and exhumation rates. Furthermore, structural balancing manifests important westward displacements responsible for the final emplacement of the Gibraltar arc. Here we present data that demonstrate the importance of transfer fault zones, normally dextral, that link the different extensional loci that produced the final exhumation of the Nevado-Filabride complex and the units that formed the accretional wedge.