Number of the records: 1

Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield

SYSNO ASEP	0368187
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield
Author(s)	Eken, T. (DE) Plomerová, Jaroslava (GFU-E)_{ORCID, RID, SAI} Vecsey, Luděk (GFU-E)_{ORCID, RID, SAI} Babuška, Vladislav (GFU-E)_{ORCID, RID, SAI} Roberts, R. (SE) Shomali, H. (SE) Bodvarsson, R. (SE)
Source Title	Geophysical Journal International - ISSN 0956-540X Roč. 188, č. 2 (2012), s. 600-612
Number of pages	13 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	body waves ; seismic anisotropy ; seismic tomography ; cratons
Subject RIV	DC - Siesmology, Volcanology, Earth Structure
R&D Projects	IAA300120709 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z30120515 - GFU-E (2005-2011)
UT WOS	000298840800016
DOI	10.1111/j.1365-246X.2011.05280.x
Annotation	We investigate possible effects of neglecting seismic anisotropy on standard isotropic P velocity tomographic images of the upper mantle beneath the Baltic shield. Isotropic inversions of teleseismic P- and S-wave traveltimes exhibit alternating high- and low-velocity heterogeneities down to depths of over 400 km. Differences in tomographic inversions of SV- and SH-wave traveltimes are distinct down to depths of about 200 km and are associated with anisotropy of the lithospheric mantle. Anisotropic structures of the upper mantle affect both the P and S traveltimes, shear-wave splitting as well as the P polarization directions. Joint inversion for isotropic and anisotropic velocity perturbations is not feasible due to the limited 3-D ray coverage of available data.
Workplace	Geophysical Institute
Contact	Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
Year of Publishing	2012

Number of the records: 1