Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography
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Інститут геофізики ім. С.I. Субботіна НАН України
2010
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| Zitieren: | Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography / L. Zaiets, T. Tsvetkova, I. Bugaienko, L. Shumlanskaya // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 210-212. — Бібліогр.: 3 назв. — англ. |
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irk-123456789-1035282016-06-20T03:01:35Z Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography Zaiets, L. Tsvetkova, T. Bugaienko, I. Shumlanskaya, L. 2010 Article Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography / L. Zaiets, T. Tsvetkova, I. Bugaienko, L. Shumlanskaya // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 210-212. — Бібліогр.: 3 назв. — англ. 0203-3100 http://dspace.nbuv.gov.ua/handle/123456789/103528 en Геофизический журнал Інститут геофізики ім. С.I. Субботіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| format |
Article |
| author |
Zaiets, L. Tsvetkova, T. Bugaienko, I. Shumlanskaya, L. |
| spellingShingle |
Zaiets, L. Tsvetkova, T. Bugaienko, I. Shumlanskaya, L. Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography Геофизический журнал |
| author_facet |
Zaiets, L. Tsvetkova, T. Bugaienko, I. Shumlanskaya, L. |
| author_sort |
Zaiets, L. |
| title |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography |
| title_short |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography |
| title_full |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography |
| title_fullStr |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography |
| title_full_unstemmed |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography |
| title_sort |
influence of surroundings features on the velocity structure of mantle under south-east asia from data of seismic tomography |
| publisher |
Інститут геофізики ім. С.I. Субботіна НАН України |
| publishDate |
2010 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/103528 |
| citation_txt |
Influence of surroundings features on the velocity structure of mantle under South-East Asia from data of seismic tomography / L. Zaiets, T. Tsvetkova, I. Bugaienko, L. Shumlanskaya // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 210-212. — Бібліогр.: 3 назв. — англ. |
| series |
Геофизический журнал |
| work_keys_str_mv |
AT zaietsl influenceofsurroundingsfeaturesonthevelocitystructureofmantleundersoutheastasiafromdataofseismictomography AT tsvetkovat influenceofsurroundingsfeaturesonthevelocitystructureofmantleundersoutheastasiafromdataofseismictomography AT bugaienkoi influenceofsurroundingsfeaturesonthevelocitystructureofmantleundersoutheastasiafromdataofseismictomography AT shumlanskayal influenceofsurroundingsfeaturesonthevelocitystructureofmantleundersoutheastasiafromdataofseismictomography |
| first_indexed |
2025-07-07T13:58:33Z |
| last_indexed |
2025-07-07T13:58:33Z |
| _version_ |
1836996849338155008 |
| fulltext |
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Influence of surroundings features on the velocity structure
of mantle under South-East Asia from data
of seismic tomography
L. Zaiets, T. Tsvetkova, I. Bugaienko, L. Shumlanskaya, 2010
Institute of Geophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine
tsvet@igph.kiev.ua
The region Ff Southeast Asia is characterized
by numerous micro-plates, which are separated by
a complex system of subduction zones, marginal
and back-arc basins, strike-slip boundaries and
accreted terrains. The western part of Southeast
Asia is comprised of three tectonic plates: the
Southeast Asia plate, the Burma plate, and the Indo-
Australian plate. The Pacific plate has influence on
Fig. 1. Pattern of spreading of velocity boundaries in the mantle corresponding to the Indo-Australian Plate on the depth
50, 75, 125 (a), 425, 600, 700, 800 (b).
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east part. Tomographic methods can provide new
information which can help to test tectonic models.
The main objective of the research presented in this
thesis is to improve our understanding about influ-
ence of surrounding structures on the velocity struc-
ture of mantle under South-East Asia of the on
depths 50—2500 km. 3D P-velocity model of SE
Asia has been obtained as a result of application of
the method of Taylor approximation of solution of
seismic tomography of P-waves arrival time intro-
duced by V. S. Geyko [Geyko, Tsvetkova, 1989;
Geyko, 1997; 2004). The solution is represented in
a form of vertical sections (latitudinal and longitudi-
nal) up to 2500 km depths with 1° spacing in re-
sidual in relation to one-dimensional referential model
obtained as a result of seismic tomography analy-
sis for Eurasia.
Fig. 2. The latitudinal cross-section of the 3D P-velocity model of mantle of the SE Asia.
In obedience to our model there is prevailing in-
fluence on the structures of SE Asia of velocities
structures, proper the Indo-Australian plate. The
mantle of the Indo-Australian plate is characterized
by a double-layer structure of upper mantle (heavy
high-velocity seismic lithosphere and thin low-ve-
locity layer), high-velocity transition zone of upper
mantle, low-velocity layer of the zone-1 and quasi-
homogeneous middle mantle. Each of layers has
the features. Disparity of tectonic boundary of plate
and boundary of distribution of low-velocity and high-
velocity areas, corresponding to this structure, is
thus marked (the boundary of velocity area is dis-
tinguished for residual 0.0 km/s to that at changing
of sign of velocity heterogeneity) (Fig. 1). Maximal
advancement of velocity layers of mantle structures
of Indo-Australian plate — to 118° longitudes on a
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depth 600 km. Other there is business with the east
outskirts of SE Asia. Boundary of mantle of the
Philippine plate, distinguished on the boundary of
velocity areas observed in a middle mantle and zone-
1. So, Philippine plate is selected a sloping low-
velocity layer, going from the side of the Philippine
plate (1300—2000 to the depth 2400 km). The boun-
dary of plate on a low-velocity layer (on depths
1400—2400 km) comes to 112° longitudes. Partly
the boundary of the Philippine plate can be selected
on completion of high velocities layer which goes
down on the depths of middle mantle and reaches
in a westward to 110 longitudes, and under Java to
108° longitudes (600—1400 km). In an upper mantle
the boundary of the Philippine plate is expressed by
changing of depth of bedding of bottom and top of
velocity layers. About the degree of influence of velo-
city structures corresponding to the Philippine plate
on the structures of Asia judging is difficult. It is fact
that the tectonic boundary of plate coincides with the
exit of low-velocities from a bottom mantle. The South-
China Sea is the knot of joining of structures of veloci-
ties, going from a south (Indo-Australian Plate) and
from a north (velocities structure of South China). The
picture of mutual introduction of layers of velocities is
observed in upper mantle and transitional zone of up-
per mantle with 112 longitudes to 118 longitudes,
within the limits of 10—20 latitude North (Fig. 2).
Geyko V. S. A general theory of the seismic travel-time
tomography // Geophys. J. — 2004. — 262�������
P. 3—32.
Geyko V. S. Taylor approach of the wave equation and
the eikonal equation in inverse seismic problems
// Geophys. J. — 1997. — 192���C����>��BD��D��
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Geyko V. S., Tsvetkova �. �. On unigueness in solu-
tion of unidimensional inverse kinematik problem
of seismic // Geophys. J. — 1989. — 112�������
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References
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