气候变化领域集成服务门户(CCPortal): The layered shear-wave velocity structure of the crust and uppermost mantle in China

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DOI	10.1785/0120050222
	The layered shear-wave velocity structure of the crust and uppermost mantle in China
	Sun, Youshun; Toksoez, M. Nafi; Pei, Shunping; Morgan, F. Dale
通讯作者	Sun, Y (通讯作者)
发表日期	2008
ISSN	0037-1106
EISSN	1943-3573
起始页码	746
结束页码	755
卷号	98 期号:2
英文摘要	We present a layered shear-wave velocity structure of the crust and uppermost mantle of China and the surrounding area. We apply an adaptive moving window (Sun, Li, et al., 2004) to construct the S-wave velocity model from highquality body-wave phase data extracted from the Annual Bulletin of Chinese Earthquakes (ABCE). More than 350,000 S-wave arrivals are used, spanning from 1990 to 2004. The study area is represented by a 1 geographic grid consisting of 2338 points. At each point, 1D S-velocity-depth profiles are determined independently from the surface to the uppermost mantle; this is accomplished by performing a Monte Carlo random search of optimum layer parameters (thickness and velocity) via minimizing travel-time misfits for fixed earthquake locations. Each profile contains a four-layer crust and a one- layer uppermost mantle. A final 3D model is obtained by combining and smoothing the 1D models. The obtained S-wave model has a good correlation with the previously published P-wave model using the same method (Sun, Li, et al., 2004) and reveals key tectonic features such as the low velocity crust beneath Tibet. Our S-wave model is generally consistent with the existing regional/local models constructed from body-wave travel-time tomography, and provides more detailed structure in both horizontal and vertical directions compared with the model derived from surface wave inversion. Based on our P- and S-wave models, the generated synthetic seismograms fit well with the observed seismograms recorded at broadband stations.
关键词	TOMOGRAPHY INVERSION MODEL
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000254528000018
来源期刊	BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
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/257554
推荐引用方式 GB/T 7714	Sun, Youshun,Toksoez, M. Nafi,Pei, Shunping,et al. The layered shear-wave velocity structure of the crust and uppermost mantle in China[J]. 中国科学院青藏高原研究所,2008,98(2).
APA	Sun, Youshun,Toksoez, M. Nafi,Pei, Shunping,&Morgan, F. Dale.(2008).The layered shear-wave velocity structure of the crust and uppermost mantle in China.BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,98(2).
MLA	Sun, Youshun,et al."The layered shear-wave velocity structure of the crust and uppermost mantle in China".BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 98.2(2008).