Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3823304s&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 23, CiteID L23304
Physics
Seismology: Mantle (1212, 1213, 8124), Seismology: Surface Waves And Free Oscillations, Seismology: Tomography (6982, 8180), Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213)
Scientific paper
Previous studies have shown that radial seismic anisotropy as estimated from flow models is in good agreement with results from tomography at global scale, in particular underlying oceanic basins. However, the fit is typically poor at smaller scale lengths, particularly in tectonically complex regions. We conduct a comparative analysis of tomographically mapped and dynamically modeled radial anisotropy at the scale of Europe and the Mediterranean Basin, including three tomographic models based on different observations and/or methods. We find that adaptive-grid surface-wave tomography, with parametrization density depending locally on the spatial and azimuthal density of data coverage, leads to the seismic model closest to (albeit still far from) geodynamic predictions. The ability to map regional-scale seismic anisotropy may provide a new constraint, complementary to isotropic tomography, to the nature of upper mantle flow.
Becker Thorsten W.
Boschi Lapo
Kissling Edi
Schaefer J. F.
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