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Título:
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Syn-tectonic sedimentary evolution of the continental latePalaeozoic-early Mesozoic Erill Castell-Estac Basin
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Autores:
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Lloret, Joan ;
Ronchi, Ausonio ;
López Gómez, José ;
Gretter, Nicola ;
Horra, Raúl de la ;
Barrenechea, José F. ;
Arche, Alfredo
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier, 2018-10-15
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/restrictedAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Geología: Geodinámica
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Materia = Ciencias: Geología: Geología estratigráfica
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Materia = Ciencias: Geología: Petrología
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Tipo = Artículo
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Resumen:
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The break-up of Pangea remains one of the most interesting moments in the Earth's history. In the Pyrenees this geological moment is represented by continental successions, giving rise to a magnificent example of the creation of new basins and their sedimentary fill. In this work we present a study based on stratigraphy, sedimentology and synsedimentary tectonics data; on this basis, we define for the first time the different tectono-stratigraphic phases that occurred in the evolution of the incipient continental basin of the Erill Castell-Estac Basin (Southern Pyrenees, NE Spain). Traditionally, four lithostratigraphic units have been defined in the area and grouped into tectono-stratigraphic units, but we propose three sedimentary cycles characterized by fining upward trends and separated by angular unconformities. The first sedimentary cycle (late Carboniferous-early Permian) is strongly related to intense volcanic activity and is characterized by isolated sub-basins. In the upper part of this cycle, fluvial and lacustrine deposits were deposited in a volcanic and transtensive tectonic context. In the second sedimentary cycle (early-middle Permian), the connection between the sub-basins started in a transtensive tectonic context. The main deposits in this cycle are lacustrine and fluvial, relative to playa-lake environments with a minor volcanic influence. Finally, the third sedimentary cycle (Early-Middle Triassic) is represented by meandering fluvial deposits with scarce lacustrine environments and no volcanic influence. The syn-depositional tectonic context is extensional, at the top of this last cycle the first Mesozoic marine incursions are preserved. Detailed description of the evolution of the Erill Castell-Estac Basin provides a new example of the sedimentary filling of strike-slip basins and is a key point to further considerations of the still unknown role of the Carboniferous to Triassic Pyrenean basins in Pangea break-up.
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En línea:
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https://eprints.ucm.es/51019/1/Syn-tectonic%20sedimentary%20evolution%20of%20the%20continental%20late%20Palaeozoic-early%20Mesozoic%20Erill%20Castell-Estac.pdf
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