During the Eifelian carbonate sedimentation was superseded by the deposition of calcareous shales and siliclastic sediments - this change represents the first manifestation of the Variscan Orogeny
. Two postorogenic sequences are also found in the vicinity of the synform: the freshwater Upper Carboniferous sequence is dominated by coarse grained conglomerates and sandstones with subordinate fluvial and lacustrine clays while the Cretaceous sequence is characterised by sandy and clayey lacustrine sediments together with glauconitic sandstones and calcareous siltstones deposited in shallow epicontinental seas.
The likely causes of these events were Carboniferous terrane accretion and collision during the Variscan orogeny
in central Europe, which peaked in Visean times.
The NE-SW-trending ALCUDIA Model is located to the west of the CVP and crosses transversally the NW-SE-to WNW-ESE-trending structures of the CIZ formed in the Variscan orogeny
Tectonometamorphic evolution includes evidence of a subductive event during Variscan Orogeny
(360 Ma), followed by exhumation through recumbent folds and ductile thrusts to the E (present coordinates) during collisional stages (345 Ma) and extensional collapse at 315 Ma (Martinez Catalan et al., 2009; Diaz Fernandez and Martinez Catalan, 2009: Gomez Barreiro et al., 2010).
ABSTRACT: In order to establish a lithospheric scale scenario in which the geologic record is in agreement with the theoretical topographical evolution that results from lithospheric delamination process that took place at the end of the Variscan orogeny
within the NW of the Iberian peninsula.
and Finger, F.: 1993, Timing of the Variscan orogeny
in the South Bohemian massif (NE Austria) deduced from new U-Pb-zircon and monazite dating, Terra Abstr., 5, 235-236.
The Upper Paleozoic, Permian-Carboniferous basins exist in the study area, forming narrow trough-like, often asymmetric depressions already independent on the course of the main Variscan orogeny
Numerous occurrences of different types (Sn-W, P, Pb-Zn, Pb-Zn-Cu, Pb-Ag, Sb, Au) have originated as a result of intensive collisional magmatic activity and regional metamorphism during Variscan orogeny
(Gumiel and Arribas, 1990).
The problem of gravitationary collapse has been discussed for the Tibet Plateau and the Variscan orogeny
as well (Becq-Giraudon and Van den Driessche, 1994).
The EFS fault zone has been repeatedly reactivated since the Late Variscan orogeny
in different regimes: transtensional at the turn of the Permian and Triassic, extensional in the Mesozoic, and transpressional at the turn of the Late Cretaceous and Palaeogene (Otto, 2003).
The Variscan orogeny
developed in the Iberian Peninsula between the late Devonian and the late Carboniferous and the three main phases of compressive deformation (D1, D2 and D3) that ended in the Westphalian B times (i.e., lower Moscovian, about 310 M.a.) are now well described and constrained in time in a wealth of papers (see Martinez-Catalan et al, 1990, 1992, 1999, 2003; Perez-Estaun et al 1993, 1994; Abalos et al., 2002; Simancas and Perez-Estaun, 2004).
The Sudetes constitute a peripheral area of the Bohemian Massif that is concordantly regarded as a part of the Variscan orogeny
(see Aleksandrowski, 1995; Zelazniewicz, 1997; Franke and Zelazniewicz, 2000; Aleksandrowski and Mazur, 2002).