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| Titel |
Crustal structure movement of the Northern Caucasus from the continuous GNSS network observations |
| VerfasserIn |
Vadim Milyukov, Alexey Mironov, Aleksandr Ovsyuchenko, Grigory Steblov |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250139981
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| Publikation (Nr.) |
 EGU/EGU2017-3305.pdf |
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| Zusammenfassung |
| The Northern Caucasus, as a part of the Alpine-Himalayan mobile belt, is a zone of complex tectonics associated with the interaction of the two major tectonic plates, Arabian and Eurasian. The first GPS study of the contemporary geodynamics of the Caucasus mountain system were launched in the early 1990s in the framework of the Russia-US joint project. Since 2005 observations of the modern tectonic motion of the Northern Caucasus are carried out using the continuous GPS network. This network encompasses the territory of four Northern Caucasian Republics: Karachay-Cherkessia, Kabardino–Balkaria, North Ossetia, Dagestan, and Stavropol region of the Russian Federation. In the Ossetian part of the Northern Caucasus the network of GPS survey-mode sites has been deployed as well.
The GPS velocities confirm weak general compression of the Northern Caucasus with at the rate of about 1-2 mm/year. This excessive horizontal motion at the boundary of the Northern Caucasus with respect to the Eurasian plate causes the higher seismic and tectonic activity of this transition zone. The result confirms that the source of deformation of the Northern Caucasus is the sub-meridional drift of the Arabian plate towards the adjacent boundary of the Eastern European part of the Eurasian lithospheric plate.
Weak deviation of observed velocities from the pattern corresponding to homogeneous compression can also be revealed, and numerical modeling of deformations of major regional tectonic structures, such as the Main Caucasus Ridge, can explain this. On the background of general compression of the Northern Caucasus expansion in the eastern part of the region in combination with shear deformation in the central and eastern parts are revealed too. |
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