Abstract Recent models support the view that Pyrenees were formed after inversion of a previously highly extended continental crust included exhumed upper mantle rocks. Mantle rocks remain near to surface compression and mountain building, covered by latest Cretaceous Paleogene sequences. 3‐D lithospheric‐scale gravity demands presence high‐density body placed within in order justify observed anomalies. Exhumed mantle, having ~50 km maximum width, continuously extends beneath...

A new Coniacian–early Santonian extensional salt tectonics event has been identified in the Cotiella thrust sheet of central Spanish Pyrenees. We present a interpretation system and describe exceptional outcrop examples postrift, gravity-driven growth faults. The contains three, kilometer-scale faults with as much 5.5 km Coniacian–lower strata their hanging walls. These postrift listric detached on prerift Triassic evaporites uplifted eroded southern flanks Early Cretaceous rift basins....

Other| March 01, 1990 Tecto-sedimentary evolution of the Organya extensional basin (central south Pyrenean unit, Spain) during Lower Cretaceous X. Berastegui; Berastegui Author Serv. Geol. Catalunya, Barcelona 08015, Spain Search for other works by this author on: GSW Google Scholar J. M. Garcia-Senz; Garcia-Senz Losantos Bulletin de la Société Géologique France (1990) VI (2): 251–264. https://doi.org/10.2113/gssgfbull.VI.2.251 Article history first online: 03 Mar 2017 Cite View This...

Abstract Critical gravity and magnetic data suggest the presence of a continuous zigzag exhumed mantle body inside attenuated crust north Iberia continental margin. We propose that this greatly conditioned structural domains Cantabrian–Pyrenean fold-and-thrust belt during their evolution from hyperextension in Early Cretaceous times to shortening inversion Cenozoic. This may be seen as new line for cross-section construction balancing, because previous cross-sections do not incorporate...

Paleomagnetic study (34 sites) of thick Cretaceous ∼5000 m marine carbonate strata from the Organyà Basin (OB) in southern Pyrenees reveals a uniformly normal polarity characteristic remanence with varying declination ( D ) (Berriasian‐Barremian, = 295°; Aptian‐Albian, 348°, upper Cretaceous, 354°) that resides magnetite and predates Late Cretaceous/Tertiary folding. The lack reverse magnetizations Berriasian‐Barremian series, together their distinct hysteresis properties are typical...

The kinematic evolution of the Pyrenees was largely controlled by structural and thermal heterogeneities inherited from a precursor rift system, resulting in complex along-strike variations style amount shortening that remain matter debate. Based on comprehensive compilation published geological geophysical data, this paper presents four newly-built sequentially restored cross-sections make it possible to quantify cumulative deformation along assess factors behind inhomogeneous lithospheric...

High-quality images provided by 3D seismic surveys have transformed the interpretations of salt geometries in passive margins. Complementary field studies are needed to expand ideas derived from image interpretation. The Cotiella Basin exposes middle Coniacian–early Santonian basins developed post-rift gravity-driven extension and diapirism proto-Atlantic Ocean. Salt-related sedimentary structural features were preserved during subsequent Pyrenean Orogeny, but diapirs squeezed such a degree...

Abstract This paper presents a sequentially restored cross‐section of the Organyà and Montsec minibasins based on geological mapping, new field observations available borehole data. The main objective was to describe geometry evolution both basins in terms salt tectonics minibasin mobility. To this end, comprehensive palaeomagnetic database has been used constrain vertical‐axis rotations potentially related translation pivoting. constitutes an asymmetric depocentre formed during Upper...

Key Points A continuous high‐density body is regarded as exhumed mantle rocks beneath the Basque‐Cantabrian Basin extending along Northern Pyrenees Pedreira et al. ( ) doubts our 3‐D gravity model, view of mantle, and proposed geodynamic model We defend point by that offers important keys to understand extension inversion North Iberian Margin

Abstract The Cotiella thrust sheet in the South Central Pyrenees is a well-studied example of an extensional basin that formed at northern Iberian rift margin during Late Cretaceous, and was inverted Cretaceous Cenozoic on top Pyrenean Unit. A palaeomagnetic study thick sequence shallow marine syn-extensional carbonates filling Basin reveals presence widespread secondary magnetization both normal reversed polarities. Neither situ nor bedding tilt correction provides satisfactory grouping...

This paper presents a geological map and cross-sections of the Cotiella thrust sheet at 1:25,000 1:50,000 scale, respectively. The covers an area 225 km2 in southern Pyrenees. structure studied is dominated by upper Santonian – lower Miocene system, which transported middle Coniacian-lower extensional basin, Basin, 10 s kilometres southwards during Pyrenean orogeny. focuses on internal its partially inverted faults up to 6.5 km Albian sediments that unconformably overlie Upper Triassic...

Abstract The Columbrets Basin is the largest Mesozoic rift basin of Valencia Trough in Western Mediterranean. analysis a seismic‐reflection survey makes it possible to reconstruct tectonic fabric underlying sedimentary basin, including structure top lower crust and Moho. It proposed that ductile deformation mid‐lower was main mechanism controlling geometry, with radial flow coeval reactivation two large‐offset SW‐dipping normal faults, inherited from precursor Permian–Triassic rifting....

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The tectonic map at scale 1:1,750,000 presented in this work shows an update of the existing knowledge main and volcanic structures along Iberian continental margins abyssal plains. morphotectonic trends around Iberia recorded superposed geodynamic processes linked to opening North Atlantic Ocean since Mesozoic evolution Mediterranean Sea during Cenozoic, as well reactivation Hercynian faults formation new Alpine orogeny. This is based on interpretation digital bathymetric model other...

Abstract Mantle-derived volcanic rocks from the Subbetic hyperextended basin in SE Spain provide new insights into composition and mechanical behavior of mantle during continental rifting. The present study describes a sequential restored cross-section along with geochemical characteristics basaltic interbedded within Mesozoic succession basin. Sedimentary stacking patterns minibasins above mobilized salt reflect relationships coeval volcanism. We recognize two type localities on basis...