BUSCADOR RECOLECTA

Digital.CSIC. Repositorio Institucional del CSIC

oai:digital.csic.es:10261/348724

Reinterpretation of the Organyà Basin, based on new detailed field observations and subsurface data, emphasizes the key contribution of Upper Triassic evaporites in the tectono-sedimentary evolution of the South-Central Pyrenees. Results are integrated in a 65-km long restored cross-section through the Serres Marginals, Montsec and eastern Organyà salt-related depocenters. The reconstructed part of the Jurassic–Cretaceous northern Iberian salt-rich rifted margin shows a template characterized by inherited Permo-Triassic basement normal faults and an initial salt thickness of 0.7 km to the south and 1.5 km to the north. The Organyà Basin is part of the South Pyrenean Diapiric Province, a large system of salt related depocenters and minibasins, that is limited to the north by the more than 120-km long Senterada salt wall complex separating the supra-salt and sub-salt domains in the Southern Pyrenees. Three main stages of diapiric activity are recognized along the northern Iberian margin from Asturias to the Eastern Pyrenees: a Jurassic early salt mobilization; a latest Jurassic–middle Albian main diapiric evolution associated with rifting; and a Campanian–Miocene diapiric reactivation during basin inversion that produced salt welds and thrust welds and translated the salt province some 60 km to the south., This research was funded by Equinor Research Centre, Bergen (Norway), by the Spanish Ministry of Economy and Competitiveness Projects ALORBE (PIE-CSIC-202030E310), with additional support from the Generalitat de Catalunya Grant AGAUR 2017 SGR 847. David Cruset acknowledges MCIN/AEI/10.13039/501100011033 and European Union NextGenerationEU/PRTR (Juan de la Cierva Formación fellowship FJC2020-043488-I)., Peer reviewed