Levantamiento tectónico asociado a transpresión en el Penibético de La Sierra del Valle de Abdalajís (Béticas)análisis estructural y geomorfológico

Abstract

The Sierra del Valle de Abdalajís (SVA) is located in the External Zones of the Betic Cordillera being part of the E-W oriented, dextral transpressive Torcal Shear Zone (ZCT). The ZCT is a conspicuous relief related to a set of aligned structural highs. The structure of the SVA is essentially defined by WSWENE trending folds and dextral-reverse strike-slip faults dipping to SSE. The southern boundary of the SVA is a dextral normal fault zone that extrudes the massif. Furthermore, the SVA is affected by normal faults with extension roughly parallel to the direction of the shortening structures. Estimate of geomorphic indices (SLk) show that the extrusion of the massif has continued until recent times, and the ENE-WSW extension has conditioned the main topographic anomalies. In despite the SVA has been structured following a transpressional kinematics with very important associated uplift, it presents some differences with other parts of the ZCT: absence of structural domains, SSE dipping of the shear zone walls and very low angles between these walls and the direction of shortening structures.