Crustal Structure of the Indochina Peninsula From Ambient Noise Tomography

Wu, Shanshan1,2; Yu, Youqiang3,4; Yang, Ting2,5; Xue, Mei3; Tilmann, Frederik4,6; Chen, Haopeng7

2022-05-01

10.1029/2021JB023384

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH   影响因子和分区

2169-9313

2169-9356

The collision between the Indian and Eurasian plates promotes the southeastward extrusion of the Indochina Peninsula while the internal dynamics of its crustal deformation remain enigmatic. Here, we make use of seismic data from 38 stations and employ the ambient noise tomography to construct a 3-D crustal shear-wave velocity (Vs) model beneath the Indochina Peninsula. A low-Vs anomaly is revealed in the mid-lower crust of the Shan-Thai Block and probably corresponds to the southern extension of the crustal flow from SE Tibet. Although the Khorat Plateau behaves as a rigid block, the observed low-Vs anomalies in the lower crust and also below the Moho indicate that the crust may have been partially modified by mantle-derived melts. The strike-slip shearing motions of the Red River Fault may have dominantly developed crustal deformation at its western flank where a low-Vs anomaly is observed at the upper-middle crust.

Indochina Peninsula crustal structure lower-crustal flow ambient noise tomography

SCI

英语

其他

National Natural Science Foundation of China[42074052] ; State Key Laboratory of Marine Geology, Tongji University[MG201902] ; Shanghai Sheshan National Geophysical Observatory["2020K04","SSKP202103"]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000797608400001

AMER GEOPHYSICAL UNION

GEOSCIENCES

Web of Science

1.Shanghai Earthquake Adm, Shanghai, Peoples R China
2.Shanghai Sheshan Natl Geophys Observ, Shanghai, Peoples R China
3.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China
4.GFZ German Res Ctr Geosci, Potsdam, Germany
5.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenyang, Peoples R China
6.Free Univ Berlin, Inst Geol Sci, Berlin, Germany
7.Guangdong Univ Technol, Dept Surveying Engn, Sch Civil & Transportat, Guangzhou, Peoples R China

Wu, Shanshan,Yu, Youqiang,Yang, Ting,et al. Crustal Structure of the Indochina Peninsula From Ambient Noise Tomography[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2022,127(5).

Wu, Shanshan,Yu, Youqiang,Yang, Ting,Xue, Mei,Tilmann, Frederik,&Chen, Haopeng.(2022).Crustal Structure of the Indochina Peninsula From Ambient Noise Tomography.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,127(5).

Wu, Shanshan,et al."Crustal Structure of the Indochina Peninsula From Ambient Noise Tomography".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 127.5(2022).