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  • 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.
  • 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. (en)
Title
  • Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield
  • Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield (en)
skos:prefLabel
  • Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield
  • Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield (en)
skos:notation
  • RIV/67985530:_____/12:00368187!RIV12-AV0-67985530
http://linked.open...avai/riv/aktivita
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  • P(IAA300120709), Z(AV0Z30120515)
http://linked.open...iv/cisloPeriodika
  • 2
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  • 133490
http://linked.open...ai/riv/idVysledku
  • RIV/67985530:_____/12:00368187
http://linked.open...riv/jazykVysledku
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  • body waves; seismic anisotropy; seismic tomography; cratons (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [078B0EAAC562]
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  • Geophysical Journal International
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  • 188
http://linked.open...iv/tvurceVysledku
  • Babuška, Vladislav
  • Plomerová, Jaroslava
  • Vecsey, Luděk
  • Bodvarsson, R.
  • Eken, T.
  • Roberts, R.
  • Shomali, H.
http://linked.open...ain/vavai/riv/wos
  • 000298840800016
http://linked.open...n/vavai/riv/zamer
issn
  • 0956-540X
number of pages
http://bibframe.org/vocab/doi
  • 10.1111/j.1365-246X.2011.05280.x
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