气候变化领域集成服务门户(CCPortal): Seismic evidence for sharp lithosphere-asthenosphere boundaries of oceanic plates

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DOI	10.1126/science.1169499
	Seismic evidence for sharp lithosphere-asthenosphere boundaries of oceanic plates
	Kawakatsu H.; Kumar P.; Takei Y.; Shinohara M.; Kanazawa T.; Araki E.; Suyehiro K.
发表日期	2009
ISSN	0036-8075
起始页码	499
结束页码	502
卷号	324 期号:5926
英文摘要	The mobility of the lithosphere over a weaker asthenosphere constitutes the essential element of plate tectonics, and thus the understanding of the processes at the lithosphere-asthenosphere boundary (LAB) is fundamental to understand how our planet works. It is especially so for oceanic plates because their relatively simple creation and evolution should enable easy elucidation of the LAB. Data from borehole broadband ocean bottom seismometers show that the LAB beneath the Pacific and Philippine Sea plates is sharp and age-dependent. The observed large shear wave velocity reduction at the LAB requires a partially molten asthenosphere consisting of horizontal melt-rich layers embedded in meltless mantle, which accounts for the large viscosity contrast at the LAB that facilitates horizontal plate motions.
英文关键词	asthenosphere; lithosphere; mantle; plate motion; plate tectonics; S-wave; seafloor; seismogram; viscosity; wave velocity; article; asthenospheric upwelling; astronomy; boundary layer; comprehension; evolution; lithosphere; molting; motion; oceanic regions; Pacific Ocean; Philippines; priority journal; sea; shear flow; velocity; viscosity; waveform; Pacific Ocean
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244238
作者单位	Earthquake Research Institute, University of Tokyo, 1-1-1Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan; Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan; National Geophysical Research Institute, Uppal Road, Hyderabad-500007, India
推荐引用方式 GB/T 7714	Kawakatsu H.,Kumar P.,Takei Y.,et al. Seismic evidence for sharp lithosphere-asthenosphere boundaries of oceanic plates[J],2009,324(5926).
APA	Kawakatsu H..,Kumar P..,Takei Y..,Shinohara M..,Kanazawa T..,...&Suyehiro K..(2009).Seismic evidence for sharp lithosphere-asthenosphere boundaries of oceanic plates.Science,324(5926).
MLA	Kawakatsu H.,et al."Seismic evidence for sharp lithosphere-asthenosphere boundaries of oceanic plates".Science 324.5926(2009).