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

V. I. Starostenko; T. Janik; O. B. Gintov; D. V. Lysynchuk; P. Środa; W. Czuba; E. V. Kolomiyets; P. Aleksandrowski; V. D. Omelchenko; K. Komminaho; A. Guterch; T. Tiira; D. N. Gryn; O. V. Legostaeva; G. Thybo; A. V. Tolkunov

doi:10.1134/S1069351317020136

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

作者: 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
隶属关系:
1. Institute of Geophysics
2. Polish Geological Institute—National Research Institute
3. Institute of Seismology
4. Department of Geography and Geology
5. State Geophysical Enterprise Ukrgeofizika
期: 卷 53, 编号 2 (2017)
页面: 205-213
栏目: Article
URL: https://journals.rcsi.science/1069-3513/article/view/224013
DOI: https://doi.org/10.1134/S1069351317020136
ID: 224013

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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.

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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

全文:

详细

作者简介

V. Starostenko

T. Janik

O. Gintov

D. Lysynchuk

P. Środa

W. Czuba

E. Kolomiyets

P. Aleksandrowski

V. Omelchenko

K. Komminaho

A. Guterch

T. Tiira

D. Gryn

O. Legostaeva

G. Thybo

A. Tolkunov

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