Sheared metagranitoids in the Ještěd Range Mts.: the role in the westward propagation of the Variscan orogenic wedge in the West Sudetes

0145585 - GLU-S 20023224 RIV CZ eng J - Journal Article
Kachlík, V. - Patočka, František - Fajst, Miroslav
Sheared metagranitoids in the Ještěd Range Mts.: the role in the westward propagation of the Variscan orogenic wedge in the West Sudetes.
Geolines. Roč. 14, - (2002), s. 43-44. ISSN 1210-9606.
[Zelazno 2002. Meeting of the Czech Tectonic Studies Group /7./. Áelazno, 09.05.2002-12.05.2002]
R&D Projects: GA AV ČR IAA3111102
Institutional research plan: CEZ:AV0Z3013912; CEZ:MSM 113100005
Keywords : metagranitoids * Krkonoše-Jizera Terrane * Variscan orogeny
Subject RIV: DB - Geology ; Mineralogy
http://geolines.gli.cas.cz/fileadmin/volumes/volume14/G14-043.pdf

The Krkonoše-Jizera Terrane nappe stacking post-dated the Late Devonian according to structural position of the metagranitoid bodies (thrust over the Ještěd Ridge Unit Middle to Late Devonian limestones) and may correspond to Early Carboniferous times. Rheological inhomogenities along boundaries of the metagranitoid bodies and greenschist grade complexes were convenient places ready for initiation and development of the Variscan thrust planes. Access of fluids during the greenschist facies metamorphism made the deformation of metagranitoids more effective due to deformation softening in higher crustal levels. According to this explanation the metagranitoids acted as important horizons for channelling of strain and played an important role during tectonic stacking of the Krkonoše-Jizera Terrane in a regional scale.
Permanent Link: http://hdl.handle.net/11104/0043162