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Fault and fold interaction during the development of the Neogene–Quaternary Almería–Níjar basin (SE Betic Cordilleras)

By
Antonio Pedrera
Antonio Pedrera
Departamento de Geodinámica, Universidad de Granada, 18071 Granada, Spain (e-mail: jgalindo@ugr.es)
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Carlos Marín-Lechado
Carlos Marín-Lechado
Instituto Geológico y Minero de España, Urb. Alcázar del Genil, Edificio Zulema, no. 4 Bajo, 18006 Granada, Spain
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Jesús Galindo-Zaldívar
Jesús Galindo-Zaldívar
Departamento de Geodinámica, Universidad de Granada, 18071 Granada, Spain (e-mail: jgalindo@ugr.es)
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Luis Roberto Rodríguez-Fernández
Luis Roberto Rodríguez-Fernández
Instituto Geológico y Minero de España, Urb. Alcázar del Genil, Edificio Zulema, no. 4 Bajo, 18006 Granada, Spain
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Ana Ruiz-Constán
Ana Ruiz-Constán
Departamento de Geodinámica, Universidad de Granada, 18071 Granada, Spain (e-mail: jgalindo@ugr.es)
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Published:
January 01, 2006

Abstract

The Neogene-Quaternary Almería-Níjar basin includes the Carboneras Fault, which constitutes a major left-lateral feature of the Betic Cordilleras. New gravity data help to determine the geometry of the sedimentary infill. The region underwent NE-SW extension during the Tortonian and local NW-SE compression during the first stages of Sierra Alhamilla uplift. During the Messinian, the sinistral strike-slip motion along the Carboneras Fault Zone, the dextral strike-slip motion along NW-SE-oriented faults, and the development of large folds such as the Sierra Alhamilla antiform, suggest clockwise rotation (towards the north) of the maximum stress axis (σ). During the Pliocene, a NNW-SSE-oriented compression also contributes to fold development. Finally, during the Quaternary, an ENE-WSW-directed extension controls the development of NW-SE-oriented normal oblique faults. The most recent local normal activity of the Carboneras Fault is related to this extension, whereas its behaviour as a left-lateral strike-slip fault may be a consequence of the accommodation of NW-SE normal fault displacements. Basic rock bodies, recognized by means of a detailed study of the magnetic anomalies, are related to the volcanic activity known to have occurred in the area in Late Miocene times.

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Geological Society, London, Special Publications

Tectonics of the Western Mediterranean and North Africa

G. Moratti
G. Moratti
CNR-Institute of Geosciences and Earth Resources, Italy
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A. Chalouan
A. Chalouan
University of Mohammed V Agdal, Rabat, Morocco
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Geological Society of London
Volume
262
ISBN electronic:
9781862395107
Publication date:
January 01, 2006

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