International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)

International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)

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№ 2, 2021

Modeling of modern Earth surface movements along the east coast of the Caspian Sea by GPS data

Akhmadova E.V.

Baku State University 23, akad. Z.Khalilov str., Baku, AZ1148

Summary

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 The results of GPS monitoring in Azerbaijan show that the studied area is characterized by different geodynamic regimes. The fact that the components of the VE velocity vectors of several GPS points relative to the east of the West Caspian fault have higher values than the VN components shows that the velocity vectors observed at these points are sharply rotated to NNE. The purpose of this paper is to investigate the relationship between velocities at these GPS stations and the kinematics of the South Caspian Basin. A kinematic model was chosen to determine the theoretical values of the GPS point vectors. Along with this, the South Caspian depression and the Iranian plate were considered as regional tectonic elements in the formation of deformation structures. The study area is bounded to the north by the Central Caspian seismic zone and to the west by the West Caspian fault. The velocities obtained from model calculations using the Okada formula agree with the measured ones. The Lower Kur, Gobustan and Absheron structural regions east of the South Caspian fault move clockwise along with the South Caspian block, which is exposed to pressure from the Iranian plate. It has been established that the GPS velocities of the structural sections of the Lower Kur, Gobustan and Absheron are caused by the movement of the South Caspian basin, which rotates clockwise under the effect of the Iranian plate.

Keywords: GPS monitoring, components of the VE and VN velocity vectors, South Caspian Basin, kinematic model

 

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