Collage tectonics in the northeasternmost part of the Variscan Belt: the Sudetes, Bohemian Massif

Abstract

A synthesis of published and new data is used to interpret the Sudetic segment of the Variscan belt as having formed by the accretion of four major and two or three minor terranes. From west to east the major terranes are (1) Lusatia-Izera Terrane, exposing Armorican continental basement reworked by Ordovician plutonism and Late Devonian-Carboniferous collision, showing Saxothuringian affinities; (2) composite Góry Sowie-Kłodzko Terrane characterized by multistage evolution (Silurian subduction, mid- to late Devonian collision, exhumation and extension, Carboniferous deformational overprint), with analogues elsewhere in the Bohemian Massif, Massif Central and Armorica; (3) Moldanubian (Gföhl) Terrane comprising the Orlica-Śnieżnik and Kamieniec massifs, affected by Early Carboniferous high-grade metamorphism and exhumation and (4) Brunovistulian Terrane in the East Sudetes, set up on Avalonian crust and affected by Devonian to late Carboniferous sedimentation, magmatism and tectonism. The main terranes are separated by two smaller ones squeezed along their boundaries: (1) Moravian Terrane, between the Moldanubian and Brunovistulian, deformed during Early Carboniferous collision, and (2) SE Karkonosze Terrane of affinities to the Saxothuringian oceanic realm, sandwiched betwen the Lusatia-Izera and Góry Sowie-Kłodzko (together with Teplá-Barrandian) terranes, subjected to high pressure-metamorphism and tectonized during Late Devonian-Early Carboniferous convergence. The Kaczawa Terrane in the NW, of oceanic accretionary prism features, metamorphosed and deformed during latest Devonian-Early Carboniferous times, may either be a distinct unit unrelated to closure of the Saxothuringian Ocean or represent a continuation of the SE Karkonosze Terrane.

Three generations of granitoids emplaced over a 300 My time span in the Strzelin Massif, Fore-Sudetic Block, SW Poland: mutual relationships and implications for secular crustal evolution

“…3). The Strzelin Complex belongs to the (para-autochtonous) Brunovistulicum (Oberc-Dziedzic et al 2003, 2005, whereas the overlying Stachów Complex can be correlated with the Moldanubian zone sensu Aleksandrowski and Mazur (2002) (Oberc-Dziedzic and Madej 2002;Oberc-Dziedzic et al 2005, 2010a, or possibly with the Saxothuringian Zone based on the presence of c. 500 Ma old orthogneisses that are commonly found in this zone (e.g. Oberc-Dziedzic et al 2009, 2010bŻelaźniewicz et al 2009).…”

An insight into a gneiss core of the Orlica-Śnieżnik Dome, NE Bohemian Massif: new structural and U–Pb zircon data

“…1). Lithostratigraphic and tectonometamorphic char ac ter is tics of the OSD are used to show af fin ity al ter na tively with the Saxothuringian or Moldanubian ter ranes (zones) of the Eu ro pean Variscides (see Franke et al, 1993;Aleksandrowski and Mazur, 2002;elaŸniewicz et al, 2006;Jastrzêbski et al, 2010;Mazur et al, 2012Mazur et al, , 2013Štípská et al, 2012). In the Orlica-OEnie¿nik Dome, the gneissic core is man tled by a ~6000 m thick metasedimentary suc ces sion of Ediacaran-Early Pa leo zoic age, re ferred to as the M³ynowiec-Stronie Group (Gunia, 1974;Gunia and Wierzcho³owski, 1979;Jastrzêbski et al, 2010;Mazur et al, 2012;¯elaŸniewicz et al, 2014b).…”

AFLP analysis reveals infraspecific phylogenetic relationships and population genetic structure of two species of Aconitum in Central Europe

“…They differ in their geological substratum and time of origin. The Sudetes represent the northeastern-most outcropping segment of the Central European Variscan (Hercynian) Belt affected by Devonian to late Carboniferous sedimentation [13,14] European Alpine System [15] formed at the Oligocene/ Miocene boundary [16,17].…”