Results 171 to 180 of about 1,858 (217)

Oroclinal arcs of the Variscan Belt: features and mechanisms

2023
Arcuate trace of large structures characterizes many mountain chains. The Variscan Belt is not an exception, and depicts one of the tightest oroclines in the world, the Ibero-Armorican Arc. In addition, the belt features a few more open arcs in the Eastern Moroccan Meseta, Central Iberia, the French Massif Central and the Bohemian Massif.
José R. Martínez Catalán, Karel Schulmann, Puy Ayarza, Jean-Bernard Edel   +3 more
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Orogenic processes: quantification and modelling in the Variscan Belt

Geological Society, London, Special Publications, 2000
Research into the orogenic processes that shaped the continental crust of Europe has a long-standing tradition. Why the need to quantify and model? It is not just satisfactory to identify subduction zones, accretionary prisms, island arcs, extensional collapse and other standard items of the geodynamic menu.
Wolfgang Franke, Volker Haak, Onno Oncken, David Tanner   +3 more
openaire   +3 more sources

Are the oroclines of the Variscan belt related to late Variscan strike‐slip tectonics?

Terra Nova, 2011
Terra Nova, 23, 241–247, 2011AbstractEarly Variscan structures and magnetic anomalies delineate four oroclines along the Variscan belt. The arcs bend the lithostratigraphic zones of the autochthon and the allochthonous terranes, which include ophiolites of the Rheic suture and units of Gondwanan derivation subducted on both sides of the Rheic Ocean.
openaire   +1 more source

The South-Western Branch of the Variscan Belt: Evidence from Morocco

Tectonophysics, 2010
Abstract This work is based on the compilation and re-evaluation of the most significant data, either personal or from the literature, concerning the Moroccan Variscides. The latter constitute the only, moderately disturbed or even undisturbed part of the South-Western Branch of the Variscan Belt, facing directly NW Gondwana.
André Michard, Lahssen Baidder, Omar Saddiqi   +2 more
exaly   +2 more sources

Tectonic evolution and global crustal architecture of the Variscan crust of the European Variscan belt constrained by geophysical data

2023
Comprehensive set of seismic and potential field data from the whole European Variscan belt is used to interpret the structure and evolution of the European Variscides as defined by Martínez Catalán et al. (2021). The gravity data show the presence of high amplitude, short-wavelength gravity anomalies correlated with the outcrops of ...
Karel Schulmann, Jean Bernard Edel, José Ramón Martínez Catalán, Stanislaw Mazur, Alexandra Guy, Jean Marc Lardeaux, Puy Ayarza, Imma Palomeras   +7 more
openaire   +1 more source

In situ chemical dating of tectonothermal events in the French Variscan Belt

Terra Nova, 2005
Abstract In situ U–Th–Pb geochronology on monazite using Electron Probe Micro Analyser has been performed on migmatite in the southern French Variscan Massif Central in order to decipher its complex history. After the Early Visean (340 Ma) nappe stacking, the Cévennes area experienced a regional migmatization already dated 330–325 Ma in northern ...
Be Mezeme, Eugène, Faure, Michel, Cocherie, Alain, Chen, Yan   +3 more
openaire   +2 more sources

Tectonics and plate tectonics model for the Variscan belt of Europe

Tectonophysics, 1986
Abstract A plate tectonics model is presented to explain the tectonometamorphic characteristics of the European Variscides. After the closing of two oceanic domains by two-sided subduction (500-420 Ma) and obduction (420-380 Ma), collision of the European and African continental plates occurred. We propose that the subsequent complex intracontinental
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Paleomagnetic evidence for tectonic rotations in the Variscan Mountain Belt

Tectonics, 1986
A critical review of Devonian and Carboniferous paleomagnetic results from the Hercynian basement of Western and Central Europe reveals large rotations. Their geographic distribution suggests a tectonic origin for large scale curved structures, such as the Ibero‐Armorican arc or the Variscan V, together with a coherence of the Hercynian domain with ...
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Tectonostratigraphic units in the Variscan belt of central Europe

1989
The Variscan belt of Europe resulted from the collision of Africa with Baltica and intervening microplates. In early Paleozoic time, Baltica was probably separated from the areas farther south by a North-German/Polish ocean, whose trace is now under younger cover in the northern part of continental Europe.
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Variscan tectonics in the Iberian Pyrite Belt, South Portuguese Zone

International Journal of Earth Sciences, 2002
This paper aims to discuss the structural evolution of the Iberian Pyrite Belt during the Variscan Orogeny. It provides new structural data, maps and cross sections from the eastern part of the Iberian Pyrite Belt. Regional geology of the South Portuguese Zone and lithostratigraphy of the Iberian Pyrite Belt are first briefly summarised.
Soriano C., Casas J.
openaire   +1 more source