engleski

Surface wave dispersion measurement in the Dinarides

The Dinarides are the orogeny located in the central Mediterranean collision zone that formed due to the interaction between Adria microplate and the European mainland. Along with the creation of the Dinarides, the north-east movement of Adria and its interaction with Europe induced the formation of several other mountain chains, namely the Alps, Apennines and Carpathians. Furthermore, this interaction also triggered many complex tectonic processes such as eastward extrusion in the Eastern Alps and an opening of the Pannonian basin due to the subduction and slab rollback in the Carpathians. Considering all the aforementioned processes, in order to piece together a tectonic history of the Central Mediterranean, it is essential to fully explore each of these processes. In comparison with the surrounding areas, the Dinarides are relatively poorly explored and tectonic processes that led to their formation are not well understood. Therefore, in order to bring some new insights, we provide a first detailed study of surface wave dispersion in the Dinarides. Using regional-to-teleseismic Rayleigh waves, we created 2-D phase-velocity models at discrete periods in the range from 20 s to 160 s. We used a two-station method with an inter-station path length larger that one wavelength. For a total of 74 seismic stations, we calculated the dispersion curves and cross-correlated them with an acceptable great-circle pair. Our preliminary results show negative velocity anomaly under the central area of Dinarides and positive anomaly beneath Pannonian basin and Adriatic sea, clearly supporting the results of the previous studies.

surface waves, two-station method, Dinarides

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