Physics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...69..239p&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 69, Issue 3-4, p. 239-245.
Physics
3
Scientific paper
This study is an analysis of the distribution of k = VP/VS and the Poisson coefficient (σ) using deep seismic sounding data from the SVEKA profile. One-dimensional models were constructed for the two longest branches of travel time for SV and P waves, on the basis of their correlation. These models are characterized by numerous layers of increased and decreased velocities. Both models show good agreement with experimental data. The k and σ values which resulted from the above models made it possible to determine the distribution of these parameters in the crystalline complex of the Earth's crust. A seismic-petrological model for the crust was proposed on the basis of the presented data. A low value of k corresponds to a layer of velocity 7.35 km s-1 and allows it to be interpreted as an ultrabasic layer in the lower part of the crust. This layer is characteristic for the Ladoga-Bothnian Bay Suture Zone.
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