Upper mantle structure and geodynamics of the Sumatra subduction zone from 3-D teleseismic P-wave tomography

doi:10.1016/j.jseaes.2018.05.004

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Upper mantle structure and geodynamics of the Sumatra subduction zone from 3-D teleseismic P-wave tomography
	Li, Xuelei 1,2,3; Hao, Tianyao 1,2,3,5; Li, Zhiwei 4
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018-08-01
卷号	161 页码:25-34
关键词	Slab Tear High-velocity anomaly Tomography Sumatra subduction zone
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.05.004
文献子类	Article
英文摘要	Teleseismic waveforms from a passive array of 63 seismic stations are applied to image the 3-D P-wave velocity structure of the mantle in the Sumatra subduction zone. In this study, 102 teleseisms with good signal-to-noise ratios were selected. In total, 1627 P-wave relative arrivals have been extracted with high accuracy based on multi-channel cross-correlation and adaptive stacking methods. With this dataset, we conducted the 3-D tomographic inversions for the 3-D P-wave velocity structure of the upper mantle in the Sumatra subduction zone. The tomographic results suggest significant lateral variations of P-wave velocity in the mantle, The trench parallel low-velocity features in the upper mantle reveal that there may be a trench-parallel flow associated with 3-D mantle flow beneath the subducting slab. The subducting Indo-Australian Plate is also clearly imaged as a continuous high-velocity anomalous zone in the mantle along the Sumatra Island. Beneath southern Sumatra, there could have a lateral detachment of high-velocity anomaly from 560 km to the deep part of the slab, which may imply the slab tearing. If it is true, we could infer that this tear in the slab may be terminated around 17.5 Ma. The advancing speed of the Indo-Australian Plate increasing from North Sumatra to South Sumatra plays a key role in the slab tear, which suggests likely that the northeastward subducting of the Indo-Australian Plate along the Sunda trench and the southeastward clockwise motion of the Sunda Shelf may form a torque tracing the Sumatra Island that facilitated the clockwise rotation of the fast-moving plate. With the oblique subduction of the Indo-Australian Plate, the asymmetric distribution of stresses along this torque on either side may induce the slab tearing.
WOS关键词	STRUCTURE BENEATH INDONESIA ; ASIA ; TIMES ; ANISOTROPY ; EVOLUTION ; COLLISION ; DYNAMICS ; INSIGHT ; OROGEN ; SUNDA
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000435062400003
资助机构	(NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (U1505232) ; (U1505232) ; (U1505232) ; (U1505232) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (U1505232) ; (U1505232) ; (U1505232) ; (U1505232) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (U1505232) ; (U1505232) ; (U1505232) ; (U1505232) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC41476033) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (NSFC91428204) ; (U1505232) ; (U1505232) ; (U1505232) ; (U1505232) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (GASI-GEOGE-01) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (2014CB845903) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203) ; (XDB06030203)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88207]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Li, Zhiwei
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Hubei, Peoples R China 5.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Xuelei,Hao, Tianyao,Li, Zhiwei. Upper mantle structure and geodynamics of the Sumatra subduction zone from 3-D teleseismic P-wave tomography[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,161:25-34.
APA	Li, Xuelei,Hao, Tianyao,&Li, Zhiwei.(2018).Upper mantle structure and geodynamics of the Sumatra subduction zone from 3-D teleseismic P-wave tomography.JOURNAL OF ASIAN EARTH SCIENCES,161,25-34.
MLA	Li, Xuelei,et al."Upper mantle structure and geodynamics of the Sumatra subduction zone from 3-D teleseismic P-wave tomography".JOURNAL OF ASIAN EARTH SCIENCES 161(2018):25-34.