气候变化领域集成服务门户(CCPortal): S wave tomography of the crust and uppermost mantle in China

CCPortal

DOI	10.1029/2008JB005836
	S wave tomography of the crust and uppermost mantle in China
	Sun, Youshun; Tokoz, M. Nafi; Pei, Shunping; Zhao, Dapeng; Morgan, F. Dale; Rosca, Anca
通讯作者	Sun, YS (通讯作者)
发表日期	2008
ISSN	2169-9313
EISSN	2169-9356
卷号	113 期号:B11
英文摘要	We use 280,000 local and regional arrival times from 13,105 local earthquakes recorded by 220 seismic stations to determine a three-dimensional S wave velocity structure of the crust and uppermost mantle under China and surrounding regions. We use a traveltime tomography code that accommodates a heterogeneous crust and varying Moho depth. The grid for tomographic inversion is 1 degrees x 1 degrees in the horizontal direction and 10 km in depth. Our results show that large velocity variations of more than 6% exist in the crust and upper mantle in the China region. The velocity image of the upper crust correlates with surface geological features. Crustal heterogeneity is clearly observed, and velocity changes are visible across some of the large fault zones. In Tibet, low velocities exist in the thick crust, and high Sn velocities exist in the southern and eastern parts. Low-velocity zones beneath volcanic sites and the rifts are clearly observed in our tomographic results. Under the Tengchong, Hainan, and Changbai volcanic areas, strong low velocity zones are visible down to the upper mantle, indicating the existence of magma chambers beneath the volcanoes.
关键词	VELOCITY STRUCTURE P-WAVE BENEATH INVERSION WESTERN SHEAR ALGORITHM MODEL
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000261146600003
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257599
推荐引用方式 GB/T 7714	Sun, Youshun,Tokoz, M. Nafi,Pei, Shunping,et al. S wave tomography of the crust and uppermost mantle in China[J]. 中国科学院青藏高原研究所,2008,113(B11).
APA	Sun, Youshun,Tokoz, M. Nafi,Pei, Shunping,Zhao, Dapeng,Morgan, F. Dale,&Rosca, Anca.(2008).S wave tomography of the crust and uppermost mantle in China.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,113(B11).
MLA	Sun, Youshun,et al."S wave tomography of the crust and uppermost mantle in China".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 113.B11(2008).