Deep structure beneath the Sulu UHPM: The result from broadband seismic tomography

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	Deep structure beneath the Sulu UHPM: The result from broadband seismic tomography
	Jiang, M (Jiang Mei); Wang, YJ (Wang YaJun); Liu, Y (Liu Yin); Qian, H (Qian Hui); Li, QQ (Li QingQing)
刊名	ACTA PETROLOGICA SINICA
	2007
卷号	23 期号:12 页码:3302-3308
关键词	Sulu orogenic belt ultra-metamorphic rocks seismic tomography high velocity block lithosphere structure
ISSN号	1000-0569
英文摘要	In order to understand the lithosphere structure beneath Sulu UHPM, a broadband seismic survey was conducted during 2003 similar to 2005 from Rizhao to Binzhou in Shandong province, deploying 25 stations with a spacing of 10 similar to 25km, using REFTER130-01 and CMG-6TD with three-components seismometers (period between 50 similar to 60s), and recording seismic data up to almost three years. The P-velocity image from seismic tomography by the acquired data clearly depicts the characteristics of the different tectonic units, including North China terrane, Sulu UHPM, and Yangtze terrane. The North China terrane within the lithosphere shows a low velocity block which extends stably towards north to Gucheng Zhen in the north of yellow river across Tanlu fault, and the depths of Moho and lithosphere of the North China Terrane are 30 similar to 35 and 75 similar to 80km, respectively. The Yangtze terrane, however, has a high velocity background. The Sulu UHPM locates between North China Terrane and Yangtze terrane, and its average crust velocity is higher than that in both sides. The UHPM is significantly featured by two high velocity blocks between Rizhao and Wulian-Yantai Fault, one within the crust and another at depth of 30 similar to 60km, which probably are composed of ultra-mafic rocks, like ecologites, were exhumated and relocated to form the ultra-metamorphic-rock complex. The bottom of the high velocity block at depth of 60km indicates that the depth of the Sulu UHPM is 60 km, and the flat bottom implies an disappearing orogenic root or another Moho discontinuity? Meanwhile, the tomography image also gives a outline of the Tanlu Fault belt, which inclines steeply towards south and vanished at the bottom of the lithosphere.
学科主题	构造地质学
WOS关键词	SCIENTIFIC DRILLING PROJECT ; VELOCITY STRUCTURE ; METAMORPHIC ROCKS ; REFLECTION ; BELT ; CHINA ; DIAMOND ; PROFILE ; REGION ; OROGEN
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000254582000024
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38491]
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, YJ ,Liu, Y ,et al. Deep structure beneath the Sulu UHPM: The result from broadband seismic tomography[J]. ACTA PETROLOGICA SINICA,2007,23(12):3302-3308.
APA	Jiang, M ,Wang, YJ ,Liu, Y ,Qian, H ,&Li, QQ .(2007).Deep structure beneath the Sulu UHPM: The result from broadband seismic tomography.ACTA PETROLOGICA SINICA,23(12),3302-3308.
MLA	Jiang, M ,et al."Deep structure beneath the Sulu UHPM: The result from broadband seismic tomography".ACTA PETROLOGICA SINICA 23.12(2007):3302-3308.