Tectonic Activities Description in the Ongoing Collision Zone of the Eurasia-Arabia Plates Using 2D Surface Waves Tomography

In order to better understand the regional tectonic activities of continent-continent ongoing collision-compressed edge zone Eurasian-Arabic plates, 2D tomography maps Caucasus territory using Rayleigh waves were generated. The images this study, illustrate large variety in surface wave propagation velocity different complex geologic units Caucasus. To draw maps, we accomplished a 2D-linear inversion procedure on dispersion curves for periods 5 70 s (depth= ~180 km). conduct this, local-regional data from ~1300 earthquakes (M≥3.9) recorded by 49 broadband stations 1999 2018 wide area with complicated used. comparison results previous studies Caucasus, long-periods (T= 50-70 s; depth km) are more influenced structure uppermost mantle which demonstrate ultralow and ultrahigh-velocity anomalies. medium-periods (30≤T≤45 s), low-velocity zones coincide areas thought be correlated underplating lower crust (e.g. shallow LAB), while, high-velocity usually demonstrating presence normal continental over stable thick or oceanic-like lid. Short-periods (5≤T≤25 s) ever-evolving deformations geological units, sedimentary basins, volcanic complexes, uplifts, reveals small zone, NW slope Aragats volcano ~7 km), is other studies.