Lateral variations of crustal structure beneath the Indochina Peninsula

Yu, Youqiang1; Hung, Tran D.1,2; Yang, Ting3; Xue, Mei1; Liu, Kelly H.4; Gao, Stephen S.4

2017-08-21

10.1016/j.tecto.2017.05.023

TECTONOPHYSICS   影响因子和分区

0040-1951

1879-3266

Crustal thickness (H) and V-p/V-s (K) measurements obtained by stacking P-to-S receiver functions recorded at 32 broadband seismic stations covering the Indochina Peninsula reveal systematic spatial variations in crustal properties. Mafic bulk crustal composition as indicated by high K (>1.81) observations is found to exist along major strike-slip faults and the southern part of the Peninsula, where pervasive basaltic magmatism is found and is believed to be the results of lithospheric thinning associated with the indentation of the Indian into the Eurasian plates. In contrast, crust beneath the Khorat Plateau, which occupies the core of the Indochina Block, has relatively large H values with a mean of 36.9 +/- 3 km and small K measurements with an average of 1.74 +/- 0.04, which indicates an overall felsic bulk composition. Those observations for the Khorat Plateau are comparable to the undeformed part of the South China Block. The laterally heterogeneous distribution of crustal properties and its correspondence with indentation-related tectonic features suggest that the Indochina lithosphere is extruded as rigid blocks rather than as a viscous flow. (C) 2017 Elsevier B.V. All rights reserved.

Crustal structure Indochina Peninsula Receiver function Extrusion

SCI ; EI

英语

其他

National Program on Global Change and Air-Sea Interaction[GASI-GEOGE-05]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000409284500016

ELSEVIER SCIENCE BV

20172303740437

Extrusion ; Strike-slip faults

Geology:481.1 ; Earthquake Measurements and Analysis:484.1

GEOSCIENCES

Web of Science

1.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
2.Hanoi Univ Min & Geol, Dept Geophys, Hanoi 100000, Vietnam
3.Southern Univ Sci & Technol SUSTech, Sch Oceanog, Shenzhen 518055, Guangdong, Peoples R China
4.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA

Yu, Youqiang,Hung, Tran D.,Yang, Ting,et al. Lateral variations of crustal structure beneath the Indochina Peninsula[J]. TECTONOPHYSICS,2017,712:193-199.

Yu, Youqiang,Hung, Tran D.,Yang, Ting,Xue, Mei,Liu, Kelly H.,&Gao, Stephen S..(2017).Lateral variations of crustal structure beneath the Indochina Peninsula.TECTONOPHYSICS,712,193-199.

Yu, Youqiang,et al."Lateral variations of crustal structure beneath the Indochina Peninsula".TECTONOPHYSICS 712(2017):193-199.