La tectónica alpina de la Falla de Alentejo-Plasencia (Macizo Hespérico).

  1. Capote, R. 1
  2. Villamor, P. 1
  3. Tsige, M. 1
  1. 1 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

Revista:
Geogaceta

ISSN: 0213-683X

Año de publicación: 1996

Título del ejemplar: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996

Número: 20

Páginas: 921-924

Tipo: Artículo

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Otras publicaciones en: Geogaceta

Resumen

Alentejo-Plasencia fault was active during the alpine compressional phases with a sinistral strike-slip movement in two main stages. The fault geometry was straight and no important bendings formed during Paleogene, when the maximum shortening direction was close to N-S or NNE-SSW. During Miocene (Middle Aragonian) and related to the Neocastellana tectonic phase, the Alentejo-Plasencia fault still moved as a sinistral strike-slip due to a NW-SE compression, but the Extremadura sector of the fault curved and bends formed along the fault at certain points where important lithologic changes were present. Several restraining and releasing bends formed; these latter creating pull-apart basins, some of them fil!ed with continental clastic sediments. Most of the fault displacement (about 3 Km.) seems to be related to the alpine tectonics. The small displacement compared with the fault length is coherent with its location on a colisional area foreland.

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