La Zona Transversal de Peñarrubia-Almargen (Béticas): tectónica transpresiva tardía y segmentación del relieve
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Abstract
En las Béticas Occidentales, la Zona Transversal de Peñarrubia-Almargen
(ZTPA) separa la Zona de Cizalla del Torcal (ZCT) de un dominio suroccidental
con diferente estilo y orientación estructural. La propia ZTPA es una banda
transpresiva oblicua a ambos dominios y sus directrices estructurales están
definidas por pliegues y fallas inversas dextrasWNW-ESE. La ZTPA está formada
por dos segmentos en escalón conectados por un puente compresivo.
El control de la ZPTA sobre la segmentación del relieve y la edad de las rocas
involucradas indican una edad de la deformación Mioceno Superior-Actual.
La localización de la ZTPA podría relacionarse con una discontinuidad mecánica
preexistente en la cobertera profunda o el basamento, pero podría explicarse
también como una evolución hacia una banda transpresiva de splays
en la terminación de la ZCT por la eventual rotación del far-field vector
The Peñarrubia-Almargen Transverse Zone (PATZ),Western Betics, separates the Torcal Shear Zone (TSZ) from a southwestern domain of different structural trend and style. The PATZ itself is a transpressional band oblique to both domains and its structural trend is defined by WNW-ESE folds and dextral reverse faults. The PATZ consists of two segments depicting an enechelon array connected by a compressive bridge. The control of the PATZ location on the relief segmentation and the age of the rocks affected, suggest that its deformation have occurred from the Upper Miocene to the Recent. The location of the PATZ could be linked to the pre-existence of a mechanical discontinuity in the basement or deep cover, but also could be explained as splays at the TSZ tip that have evolved to a transpressional band related to an eventual far-field vector rotation
The Peñarrubia-Almargen Transverse Zone (PATZ),Western Betics, separates the Torcal Shear Zone (TSZ) from a southwestern domain of different structural trend and style. The PATZ itself is a transpressional band oblique to both domains and its structural trend is defined by WNW-ESE folds and dextral reverse faults. The PATZ consists of two segments depicting an enechelon array connected by a compressive bridge. The control of the PATZ location on the relief segmentation and the age of the rocks affected, suggest that its deformation have occurred from the Upper Miocene to the Recent. The location of the PATZ could be linked to the pre-existence of a mechanical discontinuity in the basement or deep cover, but also could be explained as splays at the TSZ tip that have evolved to a transpressional band related to an eventual far-field vector rotation







