Three-dimensional structure of the crust and upper mantle beneath the south China area from long period surface waves

1993 ◽  
Vol 6 (3) ◽  
pp. 619-629
Author(s):  
Zhu-Wu Fu ◽  
Zhen Zhuang ◽  
Zi-Ling Lü ◽  
Jia-Fu Hu ◽  
Zhong-He Song ◽  
...  
Keyword(s):  
Surface Waves ◽  
South China ◽  
Upper Mantle ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
The South ◽  
Crust And Upper Mantle ◽  
Three Dimensional Structure ◽  
Long Period

scholarly journals STRUCTURE OF THE EARTH’S CRUST AND UPPER MANTLE OF THE SOUTH SIKHOTE-ALIN FROM MAGNETOTELLURIC SOUNDING AND DENSITY MODELING

2020 ◽  
Vol 39 (6) ◽  
pp. 65-81
Author(s):  
V.B. Kaplun ◽  
◽  
M.Yu. Nosyrev ◽  
Keyword(s):  
Late Cretaceous ◽  
Upper Mantle ◽  
Three Dimensional ◽  
Earth’S Crust ◽  
Sikhote Alin ◽  
The South ◽  
Crust And Upper Mantle ◽  
Earth's Crust ◽  
Cretaceous Subduction ◽  
Density Modeling

Based on the results of correlation of geoelectric and density sections made on the three-dimensional inversion from three sections located in the South Sikhote-Alin, the distribution regularities were emerged in the electric and density parameters, the relations between them were established, and new data on the structure of the Earth’s crust and upper mantle in the region were obtained. An assumption was made of the association of some density and electric inhomogeneity in the upper mantle with the processes of the Late Cretaceous subduction.

Crustal and upper mantle structure beneath the South China Sea and Indonesia

2020 ◽  
Vol 133 (1-2) ◽  
pp. 177-184
Author(s):  
V. Corchete
Keyword(s):  
South China Sea ◽  
Continental Margin ◽  
South China ◽  
Upper Mantle ◽  
Velocity Model ◽  
The South China Sea ◽  
Mantle Structure ◽  
The South ◽  
Crust And Upper Mantle ◽  
China Sea

Abstract A three-dimensional (3-D) S-velocity model for the crust and upper mantle beneath the South China Sea and Indonesia is presented, determined by means of Rayleigh wave analysis, in the depth range from 0 km to 400 km. The crustal and lithospheric mantle structure of this study area was previously investigated using several methods and databases. Due to their low resolution, a 3-D structure for this area has not been previously determined. The determination of such a 3-D S-velocity model is the goal of the present study. The most conspicuous features of the crust and upper mantle structure include the S-velocity difference between the Java Sea and the Banda Sea regions and a transitional boundary between these two regions. This model confirms the principal structural features revealed in previous studies: an oceanic crust structure in the center of the South China Sea, crustal thinning from the northern continental margin of the South China Sea to this oceanic crust, and the existence of a high-velocity layer in the lower crust of the northern continental margin. This study concludes that the north of the South China Sea is a nonvolcanic-type continental margin, solving the open question of whether the continental margin of the northern South China Sea is volcanic or nonvolcanic. A new map of the asthenosphere’s base is also presented.

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