Mantle lithosphere transition from the East European Craton to the Variscan Bohemian Massif imaged by shear-wave splitting

0433160 - GFÚ 2015 RIV DE eng J - Journal Article
Vecsey, Luděk - Plomerová, Jaroslava - Babuška, Vladislav
Mantle lithosphere transition from the East European Craton to the Variscan Bohemian Massif imaged by shear-wave splitting.
Solid Earth. Roč. 5, č. 2 (2014), s. 779-792. ISSN 1869-9510. E-ISSN 1869-9529
Institutional support: RVO:67985530
Keywords : Sorgenfrei-Tornquist zone * seismic anisotropy * suture zone * crustal structure
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 2.270, year: 2014

We analyse splitting of teleseismic shear waves recorded during the PASSEQ passive experiment (2006-2008) focused on the upper mantle structure across and around the Trans-European Suture Zone (TESZ). Altogether 1009 pairs of the delay times of the slow split shear waves and orientations of the polarized fast shear waves exhibit lateral variations across the array, as well as back-azimuth dependences of measurements at individual stations. Variable components of the splitting parameters can be associated with fabrics of the mantle lithosphere of tectonic units. In comparison with a distinct regionalization of the splitting parameters in the Phanerozoic part of Europe that particularly in the Bohemian Massif (BM) correlate with the large-scale tectonics, variations of anisotropic parameters around the TESZ and in the East European Craton (EEC) are smooth and of a transitional character. No general and abrupt change in the splitting parameters (anisotropic structure) can be related to the Teisseyre-Tornquist Zone (TTZ), marking the edge of the Precambrian province on the surface.
Permanent Link: http://hdl.handle.net/11104/0237415