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BASIC STUDY OF DISPLACEMENTS OF ACTIVE FAULTS IN THE BETIC CORDILLERA USING GNSS TECHNOLOGIES

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Wulfenia

Abstract

The Betic Cordillera is placed in the westernmost end of the Alpine Mediterranean belt and it is being deformed by the African and Eurasian convergence of the plates. The relative movement between both plates in the Iberian Peninsula sector is approximately 4-5 mm / year in a NW-SE direction. This slow but constant approaching of the plates is responsible for the compressive efforts that keep the orogens of the Rif and of the Tell (North of Africa) and Betic Cordillera (South of the Iberian Peninsula) active. At present, the Betic Cordillera only absorbs a part of the convergence between the African and Eurasian plates, since it is placed on a diffuse plate boundary and part of the deformation is also absorbed in the intracontinental orogen of the Pyrenees and in the rest of the peninsula, as a result of intraplate deformation. This study aims to analyse whether it is possible to make a preliminary or basic geodynamic study of active faults of the sector by taking advantage of the geodetic GNSS permanent stations existing in the area. This basic study is relatively inexpensive and will show the most active areas, which can later be studied in a more detailed manner.