Email this article Crustal and upper mantle velocity model along the DOBRE-4 profile from North Dobruja to the central region of the Ukrainian Shield: 2. geotectonic interpretation
- Authors: Starostenko V.I.1, Janik T.1, Gintov O.B.1, Lysynchuk D.V.1, Środa P.1, Czuba W.1, Kolomiyets E.V.1, Aleksandrowski P.2, Omelchenko V.D.1, Komminaho K.3, Guterch A.1, Tiira T.3, Gryn D.N.1, Legostaeva O.V.1, Thybo G.4, Tolkunov A.V.5
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Affiliations:
- Institute of Geophysics
- Polish Geological Institute—National Research Institute
- Institute of Seismology
- Department of Geography and Geology
- State Geophysical Enterprise Ukrgeofizika
- Issue: Vol 53, No 2 (2017)
- Pages: 205-213
- Section: Article
- URL: https://journals.rcsi.science/1069-3513/article/view/224013
- DOI: https://doi.org/10.1134/S1069351317020136
- ID: 224013
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Abstract
This part of the paper addresses the geotectonic interpretation of the velocity model obtained from the results of seismic studies under the DOBRE-4 project in Ukraine. The velocity field does not show distinct lateral changes from the Precambrian platform towards the younger tectonic structures in the southwest. Hence, based on the seismic data alone, it is not possible to recognize the tectonic units that are known on the surface. The Moho has an undulating pattern over an interval with a length of ~150 km. The amplitude of the undulations reaches 8 to 17 km. The similar wavelike behavior, although on a shorter spatial scale and lower amplitude, is also typical of the upper crust and upper mantle. The presence of several separate horizons in the folded crust revealed by the velocity model is consistent with the presence of the folded systems which have different extensions on the different depth levels in the Earth’s crust. This situation is believed to be typical of folding on the lithospheric scale and to reflect the rheological stratification of the crust. The DOBRE-4 velocity section of the crust and adjacent part of the mantle promotes a clearer view of the geodynamical model describing the formation of the southwestern part of East European Platform in the Early Precambrian from the plate’s tectonic standpoint.
About the authors
V. I. Starostenko
Institute of Geophysics
Author for correspondence.
Email: vstar@igph.kiev.ua
Ukraine, Kiev
T. Janik
Institute of Geophysics
Email: vstar@igph.kiev.ua
Poland, Warsaw
O. B. Gintov
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
D. V. Lysynchuk
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
P. Środa
Institute of Geophysics
Email: vstar@igph.kiev.ua
Poland, Warsaw
W. Czuba
Institute of Geophysics
Email: vstar@igph.kiev.ua
Poland, Warsaw
E. V. Kolomiyets
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
P. Aleksandrowski
Polish Geological Institute—National Research Institute
Email: vstar@igph.kiev.ua
Poland, Wroclaw
V. D. Omelchenko
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
K. Komminaho
Institute of Seismology
Email: vstar@igph.kiev.ua
Finland, Helsinki
A. Guterch
Institute of Geophysics
Email: vstar@igph.kiev.ua
Poland, Warsaw
T. Tiira
Institute of Seismology
Email: vstar@igph.kiev.ua
Finland, Helsinki
D. N. Gryn
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
O. V. Legostaeva
Institute of Geophysics
Email: vstar@igph.kiev.ua
Ukraine, Kiev
G. Thybo
Department of Geography and Geology
Email: vstar@igph.kiev.ua
Denmark, Copenhagen
A. V. Tolkunov
State Geophysical Enterprise Ukrgeofizika
Email: vstar@igph.kiev.ua
Ukraine, Kiev
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