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The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja

The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja

PeriDobruzha depression and its surrounding belong to border zone of the mantle under the EEP, distinguished by the changes of zero isoline of velocity discrepancies with the depth within the limits of the upper mantle and its transition zone according to the data of 3D P-velocity model. The system...

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Main Authors: Starostenko, V. I., Burakhovich, T.K., Kushnir, A., Legostaeva, O. V., Tsvetkova, T.A., Sheremet, E. M., Shumlyanskaya, L. A.
Format: Article
Language:rus
Published: Subbotin Institute of Geophysics of the NAS of Ukraine 2013
Online Access:https://journals.uran.ua/geofizicheskiy/article/view/116331
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spelling journalsuranua-geofizicheskiy-article-1163312020-10-07T12:01:09Z The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja Starostenko, V. I. Burakhovich, T.K. Kushnir, A. Legostaeva, O. V. Tsvetkova, T.A. Sheremet, E. M. Shumlyanskaya, L. A. PeriDobruzha depression and its surrounding belong to border zone of the mantle under the EEP, distinguished by the changes of zero isoline of velocity discrepancies with the depth within the limits of the upper mantle and its transition zone according to the data of 3D P-velocity model. The system of inclined layers corresponds to mantle border zone. Special features of mantle velocity structure under PeriDobruzha depression and its surrounding made possible to partition mantle prerequisites of seismicity of the area under consideration related to manifestation of mantle plume in the lower and medium mantle. Three-dimensional deep geo-electric model constructed according to the results of modern studies by MTS and MVP methods reflects heterogeneous distribution of present electric resistance in the depth of the region. Extended for hundreds of kilometers conductors are confined to deep conducting faults of different rank and their intersections. High-conductivity layer of complicated configuration is distinguished at the southern flank of the PeriDobruzha depression and occurs at the depths corresponding to lower crust and upper parts of the upper mantle. The source of the earthquakes as well as the anomalies of high electro-conductivity are mainly corresponding to occurrence of active deep tectonic faults and connection zones of geological structures of different ages. Within the interval of 28 -30° eastern longitude - 45-46° northern latitude spatial disposition of electric conductivity anomalies comply with the area of manifestation of deep mantle fluids corresponding to mantle plume. Subbotin Institute of Geophysics of the NAS of Ukraine 2013-02-01 Article Article application/pdf https://journals.uran.ua/geofizicheskiy/article/view/116331 10.24028/gzh.0203-3100.v35i1.2013.116331 Geofizicheskiy Zhurnal; Vol. 35 No. 1 (2013); 61-74 Геофизический журнал; Том 35 № 1 (2013); 61-74 Геофізичний журнал; Том 35 № 1 (2013); 61-74 2524-1052 0203-3100 rus https://journals.uran.ua/geofizicheskiy/article/view/116331/110391 Copyright (c) 2020 Geofizicheskiy Zhurnal https://creativecommons.org/licenses/by/4.0
institution Geofizicheskiy Zhurnal
collection OJS
language rus
format Article
author Starostenko, V. I.
Burakhovich, T.K.
Kushnir, A.
Legostaeva, O. V.
Tsvetkova, T.A.
Sheremet, E. M.
Shumlyanskaya, L. A.
spellingShingle Starostenko, V. I.
Burakhovich, T.K.
Kushnir, A.
Legostaeva, O. V.
Tsvetkova, T.A.
Sheremet, E. M.
Shumlyanskaya, L. A.
The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
author_facet Starostenko, V. I.
Burakhovich, T.K.
Kushnir, A.
Legostaeva, O. V.
Tsvetkova, T.A.
Sheremet, E. M.
Shumlyanskaya, L. A.
author_sort Starostenko, V. I.
title The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
title_short The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
title_full The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
title_fullStr The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
title_full_unstemmed The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja
title_sort possible nature of the seismic activity of the depths of the predobudruzhsky trough and the northern dobruja
description PeriDobruzha depression and its surrounding belong to border zone of the mantle under the EEP, distinguished by the changes of zero isoline of velocity discrepancies with the depth within the limits of the upper mantle and its transition zone according to the data of 3D P-velocity model. The system of inclined layers corresponds to mantle border zone. Special features of mantle velocity structure under PeriDobruzha depression and its surrounding made possible to partition mantle prerequisites of seismicity of the area under consideration related to manifestation of mantle plume in the lower and medium mantle. Three-dimensional deep geo-electric model constructed according to the results of modern studies by MTS and MVP methods reflects heterogeneous distribution of present electric resistance in the depth of the region. Extended for hundreds of kilometers conductors are confined to deep conducting faults of different rank and their intersections. High-conductivity layer of complicated configuration is distinguished at the southern flank of the PeriDobruzha depression and occurs at the depths corresponding to lower crust and upper parts of the upper mantle. The source of the earthquakes as well as the anomalies of high electro-conductivity are mainly corresponding to occurrence of active deep tectonic faults and connection zones of geological structures of different ages. Within the interval of 28 -30° eastern longitude - 45-46° northern latitude spatial disposition of electric conductivity anomalies comply with the area of manifestation of deep mantle fluids corresponding to mantle plume.
publisher Subbotin Institute of Geophysics of the NAS of Ukraine
publishDate 2013
url https://journals.uran.ua/geofizicheskiy/article/view/116331
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first_indexed 2024-04-21T19:40:41Z
last_indexed 2024-04-21T19:40:41Z
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