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Mantle seismic tomography beneath East-European Platform

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Опубліковано в: :Геофизический журнал
Дата:2010
Автор: Tsvetkova, T.
Формат: Стаття
Мова:Англійська
Опубліковано: Інститут геофізики ім. С.I. Субботіна НАН України 2010
Онлайн доступ:https://nasplib.isofts.kiev.ua/handle/123456789/103105
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Mantle seismic tomography beneath East-European Platform / T. Tsvetkova // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 186-188. — Бібліогр.: 1 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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author_facet Tsvetkova, T.
citation_txt Mantle seismic tomography beneath East-European Platform / T. Tsvetkova // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 186-188. — Бібліогр.: 1 назв. — англ.
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fulltext /#�)-(% '0%.�+,#(� #(%1 �25 ��������� ��� ���������������������� Mantle seismic tomography beneath East-European Platform T. Tsvetkova, 2010 Institute of Geophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine tsvet@igph.kiev.ua 3D P-velocity model of the mantle under East- European platform was received as the solution of the seismic tomography problem by Taylor approxi- mation method, which was supposed by V. S. Gey- ko [Geyko, 2004]. The solution don’t depend from the referent model selection and can be imagine in Cartesian and spherical coordinate system. The used tomography method permits recovering the mantle model being optimal in the given metric in respect with the whole totality of P-wave first arrival traveltime data within the frame of selected basic model of interpreta- tion. It includes the apriory assumptions? Theory and algorithms of numerical inversion, parameterization of velocity function, the smoothing method and other regu- larizing factors. The results are imagine in horizontal, longitude and latitude sections of the model. The gen- eralized velocity-depth caracteristics Vaver(z) were used in definitions high and low velocities and residual of velocities zVV S ,,sup , max , (1) zVV S ,,inf , min , (2) 1 0 ,, )( z S aver V ddd zzV , (3) where S( ) is the domain into horizontal section at the depth , and is its space in the coordinates , . The first time arrival from the ISC from 1964 to 2005 year were used as the input data. The 3D P-velocity model analysis shows the next properties: 1) common velocities characteristic for received mantle model under EEP is layer velocities struc- ture, which defined by inverse changing of phone velocity for each layer: high velocity tomographic lithosphere layer( upper mantle velocity characte- ristic), low velocity Golitsin — Geyko layer (transi- tion zone velocity characteristic), high velocity zone of division-1? low velocity middle mantle, high ve- locities zone of division-2, low velocities low mantle, Mantle under EEP surrounding, except eastern part, characterized by common inverse relate to mantle velocities characteristics under EEP; 2) by velocities characteristics tomographic litho- sphere under EEP can be devided on three layers: 50—100±25 km, 100±25—200±25 km, 200±25 km — tomographic lithosphere bottom; 3) mantle velocity boundary under EEP don’t coincides with EEP tectonic boundary. Maximum agreement is on the depth 50 km, and maximum changing at the Golitsyn — Geyko depth; 4) as a whole by velocity characteristics mantle under EEP can be divided into three parts: boundary mantle velocity region of interaction with 1 type activation; main part with two type mantle velocity activa- tions; east part of mantle under EEP, which has diffe- rent velocity characteristics from another mantle part. The first type of velocity activations correspond to propagation of high velocity layers from the Golytsin — Geyko layer under surrounding regions to the low velocity Golytsin-Geyko layer under EEP and increase the part of high velocities in upper mantle layers under surrounding zone to EEP. Sec- ond type of velocity activation correspond to sub- vertical low velocities layers propagation from the middle mantle to the upper mantle. It is pick out inclined layers, which mainly corresponded bound- ary mantle velocity region of interaction (Figure); 5) mantle under Barents-Pechora Platforme units with mantle under EEP by velocity characteristics So that by velocity characteristics we have both horizontal process and the vertical process in the mantle under East European Platform. ��������� ��� ���������������������� �2� ��� ��!"#�$%&'�("�%()�#*+#�' #(&"�&��&,#��-�%()� �)#..'(/ V el oc ity b ou nd ar ie s of 1 a nd 2 t yp es o f ac tiv at io ns : 1 � � & � � � � 1 � � � � � � � � � � � � � 2 � 1 � � & � � � � 1 � � � � � � � � � � � � � 2 � 3 & 3 � � � � � 3 � & 3 � � � � � � " � � � � � � � � 2 � 3 & 4 � � � 3 � � � � � � & 4 � � � � " � � � � � � 2 � 5 & 6 � � 3 � � � � � � & 6 � � � � ) � � � 7 2 � � � � � � � � � � � � & � � � � � � 7 � " � � � � � � � � 2 � 6 � � � � � 8 � � � " � � * � � � 3 � � � " � � " � � 2 � 6 � � � � � 6 � � � � � � � ) � � � 7 2 � 6 � � � � 6 � � � � � * � 7 � � � * � � � � ! � � 2 � & 1 � � � � � � � � � � & 9 � � � � � � � � ) � � � 2 � : � & � � � : � % � � � � � � � � � � � 2 � : � � & � � � � : � � � � ; � � � � � � � � � 2 � : � � � � � : � � � � � � 7 � ) � � � 7 2 � < � � � < � � � � ! � � ) � � 2 � < � � � � < � � ! � � ! � � ) � � 2 � 8 � � � � � � � 8 � � � � � � � � � � � 2 � 8 * & - � � � 8 * � � � � � � ; � ! � � � ) � � � 7 2 � 8 * � � � � 8 * � � � � � � � � � ) � � � 7 2 � = & > � � � = � � � & > � � � � � � � � � � � � 2 � = & 8 � � � = � � � � � � � � " � � * � � � ) � � � 2 � = = ? � � � = � � � � � � & = � � � @ � � � � % � � � 2 � = � � � � � = � � � � � � � � � � � � 2 � A & < � � � A � � � � & < � � � � � � * � � � � ! � � 2 � A & / � � � � A � � ! � & / � � � � 2 � A � � � � � A � � � � � % � � � � � � � 2 � / 8 � � � � / 7 � � � � � � � 8 � � � " � /#�)-(% '0%.�+,#(� #(%1 �22 ��������� ��� ���������������������� References Geyko V. S. A general theory of the seismic traveltime tomography // Geophys. J. — 2004. — 26, ��2. — P. 3—32 (in Russian).
id nasplib_isofts_kiev_ua-123456789-103105
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
issn 0203-3100
language English
last_indexed 2025-12-07T15:36:21Z
publishDate 2010
publisher Інститут геофізики ім. С.I. Субботіна НАН України
record_format dspace
spelling Tsvetkova, T.
2016-06-13T16:01:20Z
2016-06-13T16:01:20Z
2010
Mantle seismic tomography beneath East-European Platform / T. Tsvetkova // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 186-188. — Бібліогр.: 1 назв. — англ.
0203-3100
https://nasplib.isofts.kiev.ua/handle/123456789/103105
en
Інститут геофізики ім. С.I. Субботіна НАН України
Геофизический журнал
Mantle seismic tomography beneath East-European Platform
Article
published earlier
spellingShingle Mantle seismic tomography beneath East-European Platform
Tsvetkova, T.
title Mantle seismic tomography beneath East-European Platform
title_full Mantle seismic tomography beneath East-European Platform
title_fullStr Mantle seismic tomography beneath East-European Platform
title_full_unstemmed Mantle seismic tomography beneath East-European Platform
title_short Mantle seismic tomography beneath East-European Platform
title_sort mantle seismic tomography beneath east-european platform
url https://nasplib.isofts.kiev.ua/handle/123456789/103105
work_keys_str_mv AT tsvetkovat mantleseismictomographybeneatheasteuropeanplatform

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