气候变化领域集成服务门户(CCPortal): High resolution crustal model of SE Tibet from joint inversion of seismic P-wave travel-times and Bouguer gravity anomalies and its implication for the crustal channel flow

CCPortal

DOI	10.1016/j.tecto.2020.228580
	High resolution crustal model of SE Tibet from joint inversion of seismic P-wave travel-times and Bouguer gravity anomalies and its implication for the crustal channel flow
	Zhao Y.; Guo L.; Guo Z.; Chen Y.J.; Shi L.; Li Y.
发表日期	2020
ISSN	00401951
卷号	792
英文摘要	We present a high-resolution 3-D crustal model of southeastern Tibetan Plateau (SE Tibet) by joint inversion of local earthquake P-wave travel-times and Bouguer gravity anomalies. The joint inversion improves the resolution compared with travel-time-only tomography and more clearly depicts the spatial distribution of low velocity zones in the crust. Our joint inversion model finds no evidence for crustal channel flow in this part of SE Tibet. However, our velocity model shows three distinct low velocity zones in the mid-crust which are generally associated with the major fault systems that control the deformation of SE Tibet in the Cenozoic. The thick, mafic/ultramafic underplating beneath the Emeishan Large Igneous Province effectively blocks the crustal flow from Tibetan Plateau and the crustal low velocity zone beneath the Luzhijiang Fault and Xiaojiang Fault is more likely due to localized asthenospheric upwelling. At the southern end of Nujiang Fault, the joint inversion model reveals the magmatic system beneath the Tengchong volcano that facilitates melt migration from uppermost mantle to the magma chambers in the upper-to-mid crust. © 2020 Elsevier B.V.
关键词	Crustal channel flow Crustal model Emeishan Large Igneous Province Joint inversion SE Tibet Tengchong volcano
英文关键词	Channel flow; Gravitation; Velocity; Bouguer gravity anomalies; Emeishan large igneous provinces; High resolution; Joint inversion; Low velocity zones; Magmatic systems; Tibetan Plateau; Uppermost mantle; Seismic waves; Bouguer anomaly; channel flow; inverse problem; large igneous province; P-wave; three-dimensional modeling; travel time; upper crust; China; Emeishan; Qinghai-Xizang Plateau; Sichuan; Tengchong Volcanic Field; Yunnan
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207917
作者单位	Harbin Institute of Technology, Harbin, 150000, China; Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing, 100083, China; Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China
推荐引用方式 GB/T 7714	Zhao Y.,Guo L.,Guo Z.,et al. High resolution crustal model of SE Tibet from joint inversion of seismic P-wave travel-times and Bouguer gravity anomalies and its implication for the crustal channel flow[J],2020,792.
APA	Zhao Y.,Guo L.,Guo Z.,Chen Y.J.,Shi L.,&Li Y..(2020).High resolution crustal model of SE Tibet from joint inversion of seismic P-wave travel-times and Bouguer gravity anomalies and its implication for the crustal channel flow.Tectonophysics,792.
MLA	Zhao Y.,et al."High resolution crustal model of SE Tibet from joint inversion of seismic P-wave travel-times and Bouguer gravity anomalies and its implication for the crustal channel flow".Tectonophysics 792(2020).