| Abstract [eng] |
This manuscript is a result of four year studies based on the teleseismic body-wave tomography. The presented study aims to resolve the upper mantle structure around the Trans-European Suture Zone (TESZ) which is the major tectonic boundary in Europe marking transition between the old Proterozoic lithosphere in Northern-Eastern Europe (East European Craton, EEC) and the younger Phanerozoic lithosphere in Central-Western Europe. We used data of the temporary and permanent seismic stations operated within the study area from May 2006 to June 2008 when the passive seismic experiment PASSEQ 2006-2008, which aimed to study the lithosphere and asthenosphere, was carried out around the TESZ. From data of 183 seismic stations we compiled a dataset of manually picked 8308 arrivals of P-waves from teleseismic earthquakes. We selected the top quality data in order to perform inversions for the entire study area, and we divided the dataset in order to perform investigations focused on different parts of the study area. One division of the dataset was based on data quality, while the other one was based on regional distribution of the seismic stations. The non-linear teleseismic tomography algorithm TELINV was used to perform inversions with the real and synthetic datasets. As a result, we obtain a model of P-wave velocity variations up to about ±3 % compared to the IASP91 velocity model around the TESZ from 70 km (from 60 km for the EEC) down to 350 km. We find that the higher values of seismic velocities to the east of the TESZ correspond to the older EEC, while the lower ones to the west of the TESZ correspond to younger Western Europe. The seismic lithosphere-asthenosphere boundary (LAB) is more distinct beneath the Phanerozoic part of Europe than beneath its Precambrian part. .. |
