PUBLICATIONS Tectonics RESEARCH ARTICLE Rising and falling diapirs, shifting depocenters, and flap 10.1002/2015TC004001 overturning in the Cretaceous Sopeira and Sant Gervàs Key Points: subbasins (Ribagorça Basin, southern Pyrenees) • Protracted halokinesis from Cretaceous extension to compression Eduard Saura1, Lluís Ardèvol i Oró2, Antonio Teixell3, and Jaume Vergés1 is recorded in Ribagorca Basin • Diachronous Ribagorca Basin 1Group of Dynamics of the Lithosphere, Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Barcelona, Spain, depocenters were part of a large 2 3 diapiric province in southern Pyrenees Geoplay Pyrenees Ltd. and Catalonia Geological Research, Tremp, Spain, Departament de Geologia, Universitat • Gravitational extension ruled the Autònoma de Barcelona, Bellaterra, Spain South Pyrenean rift margin from late Albian to late Santonian Abstract The halokinetic structure of inverted salt-related continental margins is frequently obliterated by compressional overprinting. The Cretaceous Sopeira and Sant Gervàs subbasins of the Ribagorça Basin (south Correspondence to: central Pyrenees) show evidence of salt-related extensional tectonics and diapiric growth along the Iberian E. Saura, Margin of the Mesozoic Pyrenean rift. We present an integrated field-based tectonic-sedimentary study to
[email protected] reconstruct the evolution of the Ribagorça Basin system previous to, and in the early stages of, the Pyrenean orogeny. The ~4 km thick Albian-Cenomanian Sopeira minibasin infill thins toward the basin borders, Citation: especially toward the eastern, N-S trending, Llastarri salt weld. The 90° tilt to the south of the Sopeira basin Saura, E., L. Ardèvol i Oró, A. Teixell, bottom records the growth of the buried north dipping Sopeira listric fault from Albian to Santonian times, when it and J.