Naslov
Lithosphere slabs beneath the Dinarides from teleseismic tomography as the result of the Adriatic lithosphere downwelling

Autori
Šumanovac, Franjo ; Markušić, Snježana ; Engelsfeld, Tihomir ; Jurković, Klaudia ; Orešković, Jasna ; Kolar, Saša

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
EGU Series: Émile Argand Conference / - , 2017, 1-1

Skup
13th Workshop on Alpine Geological Studies – Émile Argand Conference (EGU Series) ,

Mjesto i datum
Zlatibor, Srbija, 07.09.2017. - 18.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Teleseismic tomography, Lithosphere slab, Adriatic microplate, Dinarides, Pannonian basin, Subduction

Sažetak
The study area covers the Dinarides and southwestern part of the Pannonian basin as the marginal zone between the Adriatic microplate (African plate) and the Pannonian tectonic segment (Eurasian plate). Wecreated a threedimensional seismic velocity model to 450 km depth using teleseismic tomography. Our travel-time datasetwas collected by means of 40 seismic stations fromthe ORFEUS database and Croatian Seismological Survey database. A set of 90 teleseismic earthquakes were selected in the time range 2014–2015, and relative P-wave travel-time residuals were calculated. For the first time the seismic P-wave velocity model of a relatively high resolution on the entire Dinaridic mountain belt was obtained. Based on this model, a more reliable insight in the relations of the lithosphere plates has been achieved. We imaged a fast velocity anomaly extending underneath the entire Dinaridic mountain belt which indicates cold, rigid materials. The anomaly is steeply sloping towards the northeast and directly indicates the sinking of the Adriatic microplate underneath the Pannonian tectonic segment. In the Northern Dinarides the anomaly extends to the depth of 250 km, whereas in the Southern Dinarides it covers greater depths, up to 450 km. The shallowAdriatic slab extends along the External Dinarides, while the deep Adriatic slab extends beneath the Internal Dinarides and ophiolite zones in the area of central and southern Dinarides. Different slab depths are interpreted as the faster convergence of the plate in the southern Dinarides than in the northern, or the convergence of the plates had started in the southern part and systematically developed to the north.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Geofizika, Rudarstvo, nafta i geološko inženjerstvo

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