Análisis integrado de la topografía y anomalías gravimétricas en modelación análoga: un modelo de evolución del relieve en la Península Ibérica.
- Javier Fernández-Lozano 12
- Dimitrios Sokoutis 1
- Ernst Willingshofer 1
- A. Muñoz-Martín 2
- Gerardo De Vicente 2
- Sierd Cloetingh 1
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1
VU University Amsterdam
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2
Universidad Complutense de Madrid
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ISSN: 0214-2708
Year of publication: 2011
Volume: 24
Issue: 3-4
Pages: 153-172
Type: Article
More publications in: Revista de la Sociedad Geológica de España
Abstract
The integrated analysis of topography and gravity anomalies carried out in the Iberian Peninsula invokes to the presence of large-scale folds affecting the entire lithosphere. Such folds are the precursors of E-W to NE-SO reliefs distributed along the Variscan Massif, meanwhile a mechanism of crustal thickening nucleated along Late-Variscan faults can influence the topographic pattern in the eastern part of Iberia (Iberian Range-Costero Catalan Ranges) characterised by E-W, NE-SW and NWSE trends. The mechanism of deformation as well as the style depends on the initial rheological properties from one lithosphere to another (strong and cold Variscan lithosphere to the west and a relative weak and hot lithosphere affected by the Mesozoic extension to the east) and influenced by pre-existent faults. We present a new approach based on the spectral analyses of topography and gravity over the analogue modelling results that can help to infer the responsible mechanisms for the observed intra-plate relief asymmetry in Iberia. Our results enhance the study of other areas within plate interiors like Central Asia or the Atlas in northern Africa, where the lack of data or resolution from deep seismic profiles or geomagnetics may hamper the interpretation of the lithosphere in depth.