The crust and upper mantle structure beneath the Himalaya orogenic belt The result from local earthquake data analysis

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	The crust and upper mantle structure beneath the Himalaya orogenic belt The result from local earthquake data analysis
	Jiang, M (Jiang Mei); Wang, YX (Wang YouXue); Nabelek, J (Nabelek, John); Qian, H (Qian Hui); Wang, YJ (Wang YaJun); Liu, Y (Liu Yin); Zhang, LS (Zhang LiShu); Zhao, L (Zhao Lei)
刊名	ACTA PETROLOGICA SINICA
	2008
卷号	24 期号:7 页码:1509-1516
关键词	Himalaya Broadbant Local earthquake Crust and upper mantle structure
ISSN号	1000-0569
英文摘要	The broadbant seismic observation through Himalaya was started in 2002 and ended in 2005. The stations are deployed closely along the profile and the reflection wave data of local earthquake was collected. There is an important significance for studying velocity interfaces inside the crust and upper mantle. The data show that the most earthquakes in Qinghai-Tibet plateau happened in the upper crust. The PmP-arrivals and SmS-arrivals of the reflections from Moho in plateau are very clear with strong energy. The offsets happen in both of PmP and SmS across the Yalu-Tsangpo River, indicating the Moho in the North is deeper than that in the South. The reflection from Moho in the Event Fw21 in Lhasa block was recorded along the profile from Gaize to Lugu with an average P-velocity velocity of 6.3km/s, especially the SmS is very clear and continuous. This case indicates that the Moho within the Lhasa block is much flat and continuous without horizontal relief and vertical offset. Another strong reflection before the Moho reflection is from the interfaceal depth of 45km, which may be the top of lower crust. In the Event P208, both the PmP and SmS are clearly identified. However, Another two strong reflection, P-LT, S-LT, respectively exist beyond distance of 450km, and can be deduced to be the reflections from the bottom of the lithosphere at the depth of 160 km in this region. Based upon the analysis of local earthquake data, the crust and upper mantle structure across Himalaya orogenic beltis established.
学科主题	固体地球物理学
WOS关键词	RECEIVER-FUNCTION ; TIBETAN PLATEAU ; SEISMOLOGY ; SUBDUCTION ; VELOCITY ; PROFILE ; IMAGES
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000260313300008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38752]
专题	中国地质调查局
作者单位	Hefei Univ Technol, Hefei 230005, Peoples R China
推荐引用方式 GB/T 7714	Jiang, M ,Wang, YX ,Nabelek, J ,et al. The crust and upper mantle structure beneath the Himalaya orogenic belt The result from local earthquake data analysis[J]. ACTA PETROLOGICA SINICA,2008,24(7):1509-1516.
APA	Jiang, M .,Wang, YX .,Nabelek, J .,Qian, H .,Wang, YJ .,...&Zhao, L .(2008).The crust and upper mantle structure beneath the Himalaya orogenic belt The result from local earthquake data analysis.ACTA PETROLOGICA SINICA,24(7),1509-1516.
MLA	Jiang, M ,et al."The crust and upper mantle structure beneath the Himalaya orogenic belt The result from local earthquake data analysis".ACTA PETROLOGICA SINICA 24.7(2008):1509-1516.