Asthenospheric Flow Channel From Northeastern Tibet Imaged by Seismic Tomography Between Ordos Block and Yangtze Craton

Yu，Yong1,2,3; Chen，Yongshun John1,3,4; Feng，Yongge2; An，Meijian5; Liang，Xiaofeng6; Guo，Zhen1,3,4; Qu，Wulin1,7; Li，Shilin1; Dong，Shuwen5,8

2021-09-16

10.1029/2021GL093561

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

The collision between India and Eurasia forming the Tibetan Plateau since the early Cenozoic had led to the crustal and upper-mantle (asthenospheric) extrusion from the plateau to the east. However, the Ordos and Yangtze cratonic keels next to the northeastern and eastern Tibetan Plateau obstruct this eastward asthenospheric extrusion. With a dense seismic array, for the first time, we imaged a narrow low P-wave and S-wave velocity anomaly characterized with higher Vp/Vs between these two Archean cratons at depths ranging from 150 to 300 km using finite-frequency tomography. We interpret this low-velocity anomaly as a channel of the eastward asthenospheric flow from the Tibetan Plateau. We provide solid seismic observations for a pathway of the Tibetan asthenospheric extrusion due to the ongoing collision of the Indian and Eurasian continents. This asthenospheric extrusion from the Tibetan Plateau could influence the lithospheric reworking in the central and eastern North China Craton.

asthenospheric flow finite-frequency tomography the northeastern Tibetan Plateau the Ordos block the Qinling-Dabie orogenic belt

SCI ; EI

英语

第一 ; 通讯

WOS:000694653200071

20213710893671

Channel flow ; Seismic prospecting ; Seismic waves ; Seismology ; Shear waves ; Wave propagation

Seismology:484 ; Earthquake Measurements and Analysis:484.1 ; Fluid Flow, General:631.1 ; Mechanics:931.1

GEOSCIENCES

2-s2.0-85114735314

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Institute of Theoretical and Applied Geophysics,School of Earth and Space Sciences,Peking University,Beijing,China
3.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,China
4.Shanghai Sheshan National Geophysical Observatory and Research Station,Shanghai,China
5.Chinese Academy of Geological Sciences,Beijing,China
6.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China
7.Department of Computer Science,School of Information Engineering,Xuchang University,Xuchang,China
8.State Key Laboratory for Mineral Deposits Research,School of Earth Sciences and Engineering,Nanjing University,Nanjing,China

Yu，Yong,Chen，Yongshun John,Feng，Yongge,et al. Asthenospheric Flow Channel From Northeastern Tibet Imaged by Seismic Tomography Between Ordos Block and Yangtze Craton[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(17).

Yu，Yong.,Chen，Yongshun John.,Feng，Yongge.,An，Meijian.,Liang，Xiaofeng.,...&Dong，Shuwen.(2021).Asthenospheric Flow Channel From Northeastern Tibet Imaged by Seismic Tomography Between Ordos Block and Yangtze Craton.GEOPHYSICAL RESEARCH LETTERS,48(17).

Yu，Yong,et al."Asthenospheric Flow Channel From Northeastern Tibet Imaged by Seismic Tomography Between Ordos Block and Yangtze Craton".GEOPHYSICAL RESEARCH LETTERS 48.17(2021).