Unusually thickened crust beneath the Emeishan large igneous province detected by virtual deep seismic sounding

doi:10.1016/j.tecto.2017.10.009

	Unusually thickened crust beneath the Emeishan large igneous province detected by virtual deep seismic sounding
	Liu, Zhen 1; Tian, Xiaobo 1,2; Chen, Yun 1; Xu, Tao 1,2; Bai, Zhiming 1; Liang, Xiaofeng 1; Iqbal, Javed 3; Xu, Yigang 4
刊名	TECTONOPHYSICS
	2017-11-28
卷号	721 页码:387-394
关键词	Virtual Deep Seismic Sounding High-velocity Lower Crustal Body Emeishan Large Igneous Province Southwest China
ISSN号	0040-1951
DOI	10.1016/j.tecto.2017.10.009
文献子类	Article
英文摘要	The Emeishan Large Igneous Province (ELIP) in southwest China represents the erosional remnant of a vast basalt field emplaced during the Permian Period. Spanning 0.25 million km(2), the ELIP occupies a relatively small area relative to other Large Igneous Provinces (LIPs) such as the Siberian Traps and Ontong Java Plateau. The original volume of an ancient LIP can be constrained from estimates of its intrusive component. We used virtual deep seismic sounding (VDSS) to detect the boundary between the crust and the upper mantle (Moho) beneath the ELIP. A strong set of reflections from depths of 60-70 km indicate an unusually thick crust having a P-wave velocity of 7.0-7.4 km/s located beneath the inner zone of the ELIP. A high-velocity lower crustal body (HVLCB) of this thickness may have been formed by ponding magmas derived from the Emeishan mantle plume and associated fractionated materials. Combined images of crustal structure allow re-estimation of Emeishan magmatic volume. With a total estimated volume of 1.76-3.2 x 10(6) km(3), the ELIP appears to have been a typical sized plume-generated LIP relative to other global examples.
WOS关键词	COMPRESSIONAL WAVES ; SOUTHWESTERN CHINA ; SOUTHERN TIBET ; FLOOD BASALTS ; MANTLE ; VELOCITY ; CONSEQUENCES ; PLATEAU ; CONVECTION ; PLUMES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418309400026
资助机构	Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; 41574048) ; 41574048) ; 41574048) ; 41574048) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; 41574048) ; 41574048) ; 41574048) ; 41574048) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; 41574048) ; 41574048) ; 41574048) ; 41574048) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Key Research and Development Project of China(2016YFC0600302) ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; National Natural Science Foundation of China(41604051 ; 41574048) ; 41574048) ; 41574048) ; 41574048)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82242]
专题	中国科学院地质与地球物理研究所
通讯作者	Tian, Xiaobo
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 3.Abbottabad Univ Sci & Technol, Dept Earth Sci, Abbottabad, Pakistan 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhen,Tian, Xiaobo,Chen, Yun,et al. Unusually thickened crust beneath the Emeishan large igneous province detected by virtual deep seismic sounding[J]. TECTONOPHYSICS,2017,721:387-394.
APA	Liu, Zhen.,Tian, Xiaobo.,Chen, Yun.,Xu, Tao.,Bai, Zhiming.,...&Xu, Yigang.(2017).Unusually thickened crust beneath the Emeishan large igneous province detected by virtual deep seismic sounding.TECTONOPHYSICS,721,387-394.
MLA	Liu, Zhen,et al."Unusually thickened crust beneath the Emeishan large igneous province detected by virtual deep seismic sounding".TECTONOPHYSICS 721(2017):387-394.