The rotation of Iberia during the Aptian and the opening of the Bay of Biscay

Gong, Zhihong; Langereis, C.G.; Mullender, Tom A. T.

doi:10.1016/j.epsl.2008.06.016

Cited by 157 publications

(188 citation statements)

References 52 publications

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“…When working on Iberian trackways, further adjustments may be needed to take into account the anticlockwise rotation of the Iberian Plate. Compared to the present, and based on sea-floor anomalies and palaeomagnetic data, this was rotated by about 40°in the Aptian and by 35°in the Berriasian (Sibuet et al, 2004a,b;Gong et al, 2008). However, this was not taken into account in the present work for the sake of simplicity since all the structures examined must have been equally rotated.…”

Section: Methodsmentioning

confidence: 74%

Probable palaeogeographic influences of the Lower Cretaceous Iberian rifting phase in the Eastern Cameros Basin (Spain) on dinosaur trackway orientations

Moratalla

Hernán

2010

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Cameros Basin sedimentary infill comprises a large, essentially continental, megasequence ranging from the Tithonian (Upper Jurassic) to the Albian (Lower Cretaceous). It occupies an area of some 5500 km 2 , and is home to around 300 dinosaur tracksites. Most of these tracksites are found in either the Huérteles Formation, which is part of the Oncala Group (Berriasian), or the Enciso Group (Lower Aptian), both of which represent early Cretaceous lacustrine episodes. Dinosaur trackways (n = 1170) from both episodes were analysed in order to establish the preferred direction of dinosaur movement, and to determine whether these movements were influenced by the palaeogeographic and palaeoenvironmental conditions of the area. The Huérteles Formation is interpreted as a complex record of alluvial plain systems distally connected with a playa-lake. Its dinosaur tracksites are distributed throughout its alluvial plain facies and trackways show two preferential unidirectional orientations: 1) NW, more or less parallel to the distribution of the facies belt and 2) NNE. The Enciso Group is represented by a wide and shallow lacustrine system connected with marine environments towards the SE (Iberian Basin realm) and in close proximity to marine settings to the NW (Basque-Cantabrian Basin realm), rendering the Cameros Basin as the only continental connection between the Ebro and Iberian Massifs. The fluctuating (but always shallow) water level of the system with frequent desiccations probably allowed dinosaurs to pass through the lake basin. As a consequence of these paleogeographic restrictions, the dinosaur trackways generally show a bidirectional NE-SW orientation. Despite the temporal and geographical differences between the Huérteles Formation and Enciso Group, the ichnocenoses of both are dominated by theropod dinosaur trackways (85% as a mean value). This is probably explained by these dinosaurs being more active than others, a consequence of their searching/hunting behaviour.

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Section: Methodsmentioning

confidence: 74%

Probable palaeogeographic influences of the Lower Cretaceous Iberian rifting phase in the Eastern Cameros Basin (Spain) on dinosaur trackway orientations

Moratalla

Hernán

2010

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…This consisted in an anti-clockwise rotation and sinistral displacement of the Corso- and on its extent east of the Pyrenean domain (Matte, 1986;Stampfli, 1993;Olivet, 1996;Lefort and Agarwal, 1999;Gong et al, 2008;Vissers and Meijer, 2012;Carreras and Druguet, 2014). According to Stampfli (1993), the Iberian plate would have encompassed the Balearic Islands, the Corso-Sardinian block and the Briançonnais block, nowadays in the western Alps.…”

Section: Effects Of Eo-alpine Tectonicsmentioning

confidence: 96%

Structure and tectonic setting of the SE Sardinia mafic dyke swarm. Insights for the stress state during magma emplacement in the upper crust

Martínez-Poza

Druguet

2016

Journal of Geodynamics

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“…Geological studies of the Pyrenees have generated, and continue to generate, numerous controversies due to its highly debated plate kinematic framework (Le Pichon et al 1970;Choukroune and Mattauer 1978;Olivet 1996;Sibuet et al 2004;Gong et al 2008;Bronner et al 2011;Tucholke and Sibuet 2012;Bronner et al 2012) and complex geological and geophysical characteristics (Barnolas and Chiron 1995;Chevrot et al 2014). Recent models proposing pre-orogenic mantle exhumation have helped renew the interest of the geosciences community in this orogen.…”

Section: Introductionmentioning

confidence: 96%

Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

Boutin

Blanquat

Poujol

et al. 2015

Int J Earth Sci (Geol Rundsch)

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International audienceRecent studies proposing pre-orogenic mantle exhumation models have helped renew the interest of the geosciences community in the Pyrenees, which should be now interpreted as a hyper-extended passive margin before the convergence between Iberia and Eurasia occurred. Unresolved questions of the Pyrenean geology, as well as the understanding of the formation of hyper-extended passive margins, are how the crust was thinned, and when, where and how the crustal breakoff occurred. The study of the Variscan and pre-Variscan Pyrenean basement is thus critical to document and understand this Cretaceous crustal thinning. In order to specify the timing of Mesozoic metasomatism and the associated deformation in the pre-Mesozoic basement of the Pyrenees, we carried out a U–Th–Pb laser ablation ICP–MS study on a large panel of REE and titanium-rich minerals (titanite and rutile) from talc–chlorite ores from the eastern Pyrenees, with a special emphasis on the Trimouns deposit, the world’s largest talc quarry. Our results suggest that the Trimouns talc formation was restricted to the upper Aptian–Cenomanian time, while the talc and chlorite formation in the eastern Pyrenees occurred during several distinct Permian, Jurassic and Cretaceous episodes. These results give strong constraints on the tectonic setting of the Pyrenean domain during the transition between the Variscan and Alpine orogenic cycles, and particularly on when and how the upper crust was thinned before the crustal breakoff and the final mantle exhumation

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The rotation of Iberia during the Aptian and the opening of the Bay of Biscay

Cited by 157 publications

References 52 publications

Probable palaeogeographic influences of the Lower Cretaceous Iberian rifting phase in the Eastern Cameros Basin (Spain) on dinosaur trackway orientations

Probable palaeogeographic influences of the Lower Cretaceous Iberian rifting phase in the Eastern Cameros Basin (Spain) on dinosaur trackway orientations

Structure and tectonic setting of the SE Sardinia mafic dyke swarm. Insights for the stress state during magma emplacement in the upper crust

Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

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