The relationship between crust-lithosphere structures and seismicity on the southeastern edge of the Tibetan Plateau

doi:10.1016/j.tecto.2019.228300

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	The relationship between crust-lithosphere structures and seismicity on the southeastern edge of the Tibetan Plateau
	Xu Xingqian 1; Su Lijun 2,3,4,7; Liu Junzhe 7; Zhou Wanhuan 5; Gong Aimin 1; Qu Xin 6
刊名	TECTONOPHYSICS
	2020
卷号	776 页码:228300
关键词	LAB S wave receiver function Southeastern Tibet Longmenshan (LMS) Seismicity
ISSN号	0040-1951
DOI	10.1016/j.tecto.2019.228300
通讯作者	Su, Lijun(sulijun1976@163.com)
产权排序	2
文献子类	Article
英文摘要	The crust-lithosphere structure, especially the discontinuities such as Moho and lithosphere-asthenosphere boundary (LAB), is important in the investigation of geodynamic process implications and tectonic evolution of the lithosphere and regional seismic activity. We stacked the S receiver functions from 51 permanent broad-band stations to investigate the crust-lithosphere structures beneath the southeastern edge of the Tibetan Plateau and further discussed the mechanism of lower-crust earthquakes, the regional tectonics deformation characteristics, and the relationship between the two discontinuities and seismicity in this region. The results show that the Moho depth increases from 40 to 52km beneath the Sichuan Basin to 56-74 km on the both western side of the Longmenshan (LMS) fault and Anninhe-Zemuhe fault. The LAB depth ranges from 130 to 170 km beneath the Sichuan Basin, and a shallow belt ranges from 100 km to 130 km around the Sichuan Basin. On the Moho depth contour map, 374 moderate earthquakes that accounted for 72.2%, corresponding to the depth range of 44-52 km and 60-68 km on the both sides of a narrow strip (longitude 102 degrees similar to 104 degrees). On the LAB depth contour map, 321 earthquakes accounted for 62.15% in the depth range of 130-150 km. The variation of LAB corresponds to the increasing crustal thickness, intensive lower crustal earthquakes (hypocenters about 60 km and magnitude 4.0 <= Ms. <= 4.9) and surface abrupt elevations. It implied that Normal strong earthquakes generate the lower crustal earthquakes or aftershocks that resulted in the shear zones where fluid-induced metamorphic transformations, the eclogitization of dry granulite, and further affect the crustal thickness and deformation to control the spatial distribution of deep faults and seismicity.
电子版国际标准刊号	1879-3266
资助项目	National Natural Science Foundation of China[41867040] ; Yunnan Youth Fund program[2016FD030] ; Science and Technology Development Fund, Macao SAR[SKLIOTSC20182020] ; Belt & Road international collaboration Team of the CAS Light of West China Program
WOS关键词	VECTOR RECEIVER FUNCTIONS ; EARTHQUAKES BENEATH ; ANISOTROPY BENEATH ; IMPROVED INVERSION ; TRANSITION ZONE ; FREE-SURFACE ; DEFORMATION ; MOHO ; VELOCITY ; EVOLUTION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000518493400013
资助机构	National Natural Science Foundation of China ; Yunnan Youth Fund program ; Science and Technology Development Fund, Macao SAR ; Belt & Road international collaboration Team of the CAS Light of West China Program
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34135]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Su Lijun
作者单位	1.College of Water Conservancy, Yunnan Agricultural University, Kunming, Yunnan 650201, PR China; 2.CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, PR China; 3.China-Pakistan joint Research Center on Earth Sciences, Islamabad 45320, Pakistan; 4.University of Chinese Academy of Sciences, Beijing 100049, PR China; 5.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, PR China; 6.College of Civil and Architecture Engineering, Anyang Institute of Technology, Henan 455000, PR China 7.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, PR China;
推荐引用方式 GB/T 7714	Xu Xingqian,Su Lijun,Liu Junzhe,et al. The relationship between crust-lithosphere structures and seismicity on the southeastern edge of the Tibetan Plateau[J]. TECTONOPHYSICS,2020,776:228300.
APA	Xu Xingqian,Su Lijun,Liu Junzhe,Zhou Wanhuan,Gong Aimin,&Qu Xin.(2020).The relationship between crust-lithosphere structures and seismicity on the southeastern edge of the Tibetan Plateau.TECTONOPHYSICS,776,228300.
MLA	Xu Xingqian,et al."The relationship between crust-lithosphere structures and seismicity on the southeastern edge of the Tibetan Plateau".TECTONOPHYSICS 776(2020):228300.