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oai:docta.ucm.es:20.500.14352/130602024-07-22T16:17:41Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Lloret, Joan author Ronchi, Ausonio author López Gómez, José author Gretter, Nicola author Horra Del Barco, Raúl De La author Barrenechea, José F. author Arche, Alfredo 2023-06-17T13:19:21Z 2023-06-17T13:19:21Z 2018-10-15 0037-0738 10.1016/j.sedgeo.2018.07.014 https://hdl.handle.net/20.500.14352/13060 https://www.sciencedirect.com/science/article/pii/S0037073818301891 https://www.sciencedirect.com/ 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. eng Syn-tectonic sedimentary evolution of the continental late Palaeozoic-early Mesozoic Erill Castell-Estac Basin journal article URL https://docta.ucm.es/bitstreams/5f7b76d2-7077-47d7-837e-b5902cde3b65/download File MD5 7c3128d2e8c4a18d865adb1b5557ed60 16769211 application/pdf Syn-tectonic sedimentary evolution of the continental late Palaeozoic-early Mesozoic Erill Castell-Estac.pdf