气候变化领域集成服务门户(CCPortal): Tomographic structure of East Asia: I. No fast (slab) anomalies beneath 660 km discontinuity

CCPortal

DOI	10.1007/s11589-010-0759-x
	Tomographic structure of East Asia: I. No fast (slab) anomalies beneath 660 km discontinuity
	Pei, Shunping; Chen, Yongshun
通讯作者	Chen, YSJ (通讯作者)
发表日期	2010
ISSN	1674-4519
EISSN	1867-8777
起始页码	597
结束页码	611
卷号	23 期号:6
英文摘要	This is the first of two papers that describes a regional tomography investigation, which combines P-wave arrival times of both regional and teleseismic earthquakes to obtain 3D mantle structures of East Asia up to 1 000 km depth. The most important findings of this tomography study are reported in this paper as follows. (1) No fast P-wave velocity anomalies can be related to subducted oceanic slabs beneath the 660 km discontinuity; instead the subducted oceanic slabs become flattened and stagnant within the transition zone. (2) The high velocity anomalies in the transition zone extend up to 1 500 km to the westward of the active trenches, which is a unique feature in the worldwide subduction systems. (3) Slow P-wave velocity anomalies are visible up to similar to 250 km underneath most of the East Asia on the east of 115 degrees E, similar to the area of the stagnant slabs. These observations have important implications for the geodynamic process at depths beneath the East Asia, which might in turn control the widespread Cenozoic volcanism and associated extensional tectonics seen at the Earth's surface.
关键词	WAVE VELOCITY STRUCTURE TECTONIC EVOLUTION NORTH CHINA CRUSTAL HETEROGENEITY SEISMIC STRUCTURE DEEP-STRUCTURE TRAVEL-TIMES UPPER-MANTLE SOUTH CHINA TAN-LU
英文关键词	tomography; stagnant slab; mantle wedge
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000210043900009
来源期刊	EARTHQUAKE SCIENCE
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/257754
推荐引用方式 GB/T 7714	Pei, Shunping,Chen, Yongshun. Tomographic structure of East Asia: I. No fast (slab) anomalies beneath 660 km discontinuity[J]. 中国科学院青藏高原研究所,2010,23(6).
APA	Pei, Shunping,&Chen, Yongshun.(2010).Tomographic structure of East Asia: I. No fast (slab) anomalies beneath 660 km discontinuity.EARTHQUAKE SCIENCE,23(6).
MLA	Pei, Shunping,et al."Tomographic structure of East Asia: I. No fast (slab) anomalies beneath 660 km discontinuity".EARTHQUAKE SCIENCE 23.6(2010).