气候变化领域集成服务门户(CCPortal): Seismic Structure Beneath the Tibetan Plateau From Iterative Finite-Frequency Tomography Based on ChinArray: New Insights Into the Indo-Asian Collision

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DOI	10.1029/2019JB018344
	Seismic Structure Beneath the Tibetan Plateau From Iterative Finite-Frequency Tomography Based on ChinArray: New Insights Into the Indo-Asian Collision
	Xiao Z.; Fuji N.; Iidaka T.; Gao Y.; Sun X.; Liu Q.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	Indo-Asian continental collision has contributed to the growth of the Tibetan Plateau, which is one of the most prominent uplifts worldwide since Cenozoic. The crustal and upper-mantle structures are key factors in understanding the evolutionary process as well as lateral growth of the plateau. We present a new 3-D seismic model beneath the Tibetan Plateau and its surrounding areas, which uses a large-scale dense array from iterative finite-frequency tomography. The new tomographic images show obvious east-west geometrical change of the northward Indian lithosphere by high-velocity anomalies beneath Tibet. The high-velocity anomaly extends to Pamir in the western side, but it only reaches north Lhasa in central and eastern Tibet. A convective removal of the thickened Tibetan lithosphere is observed as a high-velocity anomaly, followed by a subvertical subduction of the Indian mantle lithosphere beneath the Bangong-Nujiang Suture in central Tibet. We speculate its link to the widespread magmatism and rapid uplift of central Tibet in late Miocene. A high-velocity gap between 100 and 250 km underneath the Longmenshan fault indicates that lithospheric delamination may play an important role in surface evolution between eastern Tibet and surrounding rigid blocks. Our detailed seismological model will give an insight into how the continents collide. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	finite-frequency tomography; Tibetan Plateau
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187972
作者单位	Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing, China; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Institut de Physique du Globe de Paris, Paris, France; Earthquake Research Institute, University of Tokyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Xiao Z.,Fuji N.,Iidaka T.,et al. Seismic Structure Beneath the Tibetan Plateau From Iterative Finite-Frequency Tomography Based on ChinArray: New Insights Into the Indo-Asian Collision[J],2020,125(2).
APA	Xiao Z.,Fuji N.,Iidaka T.,Gao Y.,Sun X.,&Liu Q..(2020).Seismic Structure Beneath the Tibetan Plateau From Iterative Finite-Frequency Tomography Based on ChinArray: New Insights Into the Indo-Asian Collision.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Xiao Z.,et al."Seismic Structure Beneath the Tibetan Plateau From Iterative Finite-Frequency Tomography Based on ChinArray: New Insights Into the Indo-Asian Collision".Journal of Geophysical Research: Solid Earth 125.2(2020).