Publication: La tectónica hercínica de cabalgamientos en el Sistema Central español.
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1981
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Servicio de Publicaciones de la Universidad Complutense de Madrid
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Abstract
En el Sistema Central la segunda de las tres principales fases hercínicas de deformación lleva asociados cabalgamientos dúctiles, probablemente de gran envergadura y vergentes hacia el NNE. En este trabajo se describe esta tectónica en varios puntos, desde la región de Avila hasta la de Somosierra, y se discute la geometría de la macroestructura y sus relaciones con otras fases hercínicas y con el metamorfismo regional. El desarrollo de estos cabalgamientos produce una importante modificación de las isogeotermas, con inversiones locales de gradiente geotérmico, que en este momento corresponde a un tipo Barrowiense con distena (M1), si bien con posterioridad las isogeotermas se recuperan, estabilizándose, finalmente, un gradiente de baja presión (M1). El modelo obtenido es semejante al de las cadenas colisionales tipo Himalaya.
In the Spanish Central System the second of the three hercynian deformation phases is associated with large ductile low-angle thrusts with a north-eastward direction of movement. In this work the structure of several points from the Avila region to Somosierra is described and the macrostructure and its relationships to the other hercynian phases and regional metamorphism is discussed. These thrusts gaye rise to important modifications of the regional isogeothenns with development of metamorphic inversions. Metamorphism prior to E is of barrowian type with almandine-kyanite (M1). Recovering of the isogeotherms during late-F2 and further is linked to the development of intermediate-low pressure gradients (M2). The model put forward here is similar to other collisional orogenic belts of himalayan type.
In the Spanish Central System the second of the three hercynian deformation phases is associated with large ductile low-angle thrusts with a north-eastward direction of movement. In this work the structure of several points from the Avila region to Somosierra is described and the macrostructure and its relationships to the other hercynian phases and regional metamorphism is discussed. These thrusts gaye rise to important modifications of the regional isogeothenns with development of metamorphic inversions. Metamorphism prior to E is of barrowian type with almandine-kyanite (M1). Recovering of the isogeotherms during late-F2 and further is linked to the development of intermediate-low pressure gradients (M2). The model put forward here is similar to other collisional orogenic belts of himalayan type.