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http://hdl.handle.net/2445/183443
Title: | Deep electrical resistivity of the northern gibraltar arc (western mediterranean): evidence of lithospheric slab break-off |
Author: | Rosell Novel, Oriol Martí i Castells, Anna Marcuello Pascual, Alejandro Ledo Fernández, Juanjo Queralt i Capdevila, Pilar Roca i Abella, Eduard Campanyà, Joan |
Keywords: | Geologia estructural Prospecció magnetotel·lúrica Prospecció geofísica Geomagnetisme Structural geology Magnetotelluric prospecting Geophysical exploration Geomagnetism |
Issue Date: | Jun-2011 |
Publisher: | John Wiley & Sons |
Abstract: | Uncertainties about the lithospheric structure of the Gibraltar Arc have led to the proposal of several contradictory models to explain its geodynamic setting. Herein, we present a novel 3-D model of the lithospheric electrical resistivity distribution beneath the whole Betic Cordillera obtained by inverting both broad-band and long-period magnetotelluric data. The lithosphere-asthenosphere boundary under SW Iberia is shown to be deeper than under the Alboran Basin. In addition, the sensitivity tests confirm the presence of a N-S oriented low-resistivity anomaly at lithospheric mantle depths east of the 4°W meridian. It coincides with an area of low velocities without earthquake hypocenters and is interpreted as asthenospheric material intruded by the lateral lithospheric tearing and breaking-off of the E-directed subducting Ligurian slab under the Alboran Domain. This scenario suggests that the opening of the Alboran Basin is related to the westward rollback of this E-directed subducting slab. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1111/j.1365-3121.2011.00996.x |
It is part of: | Terra Nova, 2011, vol. 23, num. 3, p. 179-186 |
URI: | http://hdl.handle.net/2445/183443 |
Related resource: | https://doi.org/10.1111/j.1365-3121.2011.00996.x |
ISSN: | 0954-4879 |
Appears in Collections: | Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) |
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586971.pdf | 3.83 MB | Adobe PDF | View/Open |
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