RT Journal Article
T1 Syn-tectonic sedimentary evolution of the continental latePalaeozoic-early Mesozoic Erill Castell-Estac Basin
A1 Lloret, Joan
A1 Ronchi, Ausonio
A1 López Gómez, José
A1 Gretter, Nicola
A1 Horra Del Barco, Raúl De La
A1 Barrenechea, José F.
A1 Arche, Alfredo
AB 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.
PB Elsevier
SN 0037-0738
YR 2018
FD 2018-10-15
LK https://hdl.handle.net/20.500.14352/13060
UL https://hdl.handle.net/20.500.14352/13060
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO Universidad Complutense de Madrid
NO University of Pavia
DS Docta Complutense
RD 5 abr 2025