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El nuevo Mapa Tectónico de la Península Ibérica y sus cordilleras adyacentes: El basamento de los macizos variscos
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Advisor(s)
Abstract(s)
RESUMEN: Se presenta la geología del basamento de los macizos variscos correspondiente al nuevo Mapa Tectónico de la Península Ibérica y sus cordilleras adyacentes, a escala 1:1.250.000. Las unidades cartográficas se agrupan por criterios geodinámicos, estructurales, tectono-estratigráficos, tectonosedimentarios, tectono-metamórficos y tectono-magmáticos, incluyendo geocronología actualizada. Como principales unidades geodinámicas aparecen las cuencas de antepaís y cinturones de pliegues y cabalgamientos variscos del SO ibérico y de la Zona Cantábrica, los hinterlands gondwánico y perigondwánico, los cinturones de sutura varisca del NO, centro y SO ibérico, el terreno de Finisterra y las cuencas intramontanas variscas. Estas grandes unidades se dividen en unidades estructurales según criterios de vergencia, estilo de deformación, metamorfismo y aloctonía relativa. Tectono-estratigráficamente, se agrupan conjuntos separados por discontinuidades estratigráficas mayores, y se han resaltado los niveles volcánicos, las facies sedimentarias sintectónicas (flysch, altos fondos arrecifales, molasas), las series de margen pasivo y la intensidad de los procesos metamórficos. Los cuerpos plutónicos y metaplutónicos se organizan en conjuntos de intrusión respecto a los procesos orogénicos y en relación con las rocas volcánicas dentro de cada pulso magmático. Se representan estructuras mayores, tanto contractivas (fallas inversas) como extensionales, desgarres y otras; trazas axiales de pliegues y trazas de foliación principal.
ABSTRACT: We present the basement geology of the Variscan massifs corresponding to the new Tectonic Map of the Iberian Peninsula and adjacent belts at the scale of 1:1.250.000. The cartographic units are grouped according to geodynamic, structural, tectonostratigraphic, tectonosedimentary, tectonometamorphic and tectonomagmatic criteria, including an updated geochronology. The map distinguishes as main geodynamic units the Variscan foreland basins and fold-and-thrust belts from SW Iberia and the Cantabrian Zone, the Gondwanan and Peri-Gondwanan hinterlands, the Variscan suture belts in NW Iberia, Central Iberia and SW Iberia, the Finisterra Terrane and the Variscan intramontane basins. These large units are divided into structural units according to vergence, deformation style, metamorphism and allochthonous nature. From the tectonostratigraphic point of view, the bedrock is grouped into units separated by major unconformities. Volcanic levels, syntectonic sedimentary facies (flysch, high marine reefs, molasses), passive-margin series and the intensity of metamorphic processes have been highlighted. Plutonic and meta-plutonic bodies are organized in intrusive groups respecting to major orogenic processes and related to the volcanic rocks into the corresponding magmatic pulses. Major structures, so contractive (reverse faults) as extensional, strike-slip and others; fold axis traces and main foliation trends are also represented.
ABSTRACT: We present the basement geology of the Variscan massifs corresponding to the new Tectonic Map of the Iberian Peninsula and adjacent belts at the scale of 1:1.250.000. The cartographic units are grouped according to geodynamic, structural, tectonostratigraphic, tectonosedimentary, tectonometamorphic and tectonomagmatic criteria, including an updated geochronology. The map distinguishes as main geodynamic units the Variscan foreland basins and fold-and-thrust belts from SW Iberia and the Cantabrian Zone, the Gondwanan and Peri-Gondwanan hinterlands, the Variscan suture belts in NW Iberia, Central Iberia and SW Iberia, the Finisterra Terrane and the Variscan intramontane basins. These large units are divided into structural units according to vergence, deformation style, metamorphism and allochthonous nature. From the tectonostratigraphic point of view, the bedrock is grouped into units separated by major unconformities. Volcanic levels, syntectonic sedimentary facies (flysch, high marine reefs, molasses), passive-margin series and the intensity of metamorphic processes have been highlighted. Plutonic and meta-plutonic bodies are organized in intrusive groups respecting to major orogenic processes and related to the volcanic rocks into the corresponding magmatic pulses. Major structures, so contractive (reverse faults) as extensional, strike-slip and others; fold axis traces and main foliation trends are also represented.
Description
Keywords
Mapa tectónico Tectono-estratigráfico Tectono-sedimentario Tectono-metamórfico Tectono-magmático Tectonic map Geodynamics Tectonostratigraphic Tectonosedimentary Tectonometamorphic Tectonomagmatic
Citation
Rubio Pascual, F.J., Rodríguez Fernández, L.R., Martín Parra, L.M., González Menéndez, L., Gallastegui, G., Solá, A.R., Romão, J.M., Matas, J., Mink, S., González Cuadra, P. & Díez Fernández, R. (2024). El nuevo Mapa Tectónico de la Península Ibérica y sus cordilleras adyacentes: El basamento de los macizos variscos. In: Geo-Temas, vol. 20, XI Congresso Geológico de España, Ávila, España, 2-6 July, 2024, pp. 956-959
Publisher
Sociedad Geológica de España