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3D P wave velocity structures of crust and their relationship with earthquakes in the Shandong area
Su Dao-Lei1,2,3; Fan Jian-Ke1; Wu Shi-Guo1,4; Chen Chuan-Xu1,2; Dong Xiao-Na5; Chen Shi-Jun5; Wu, Shi-guo
2016-04-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
Volume59Issue:4Pages:1335-1349
Abstract

A high-resolution 3D P-wave velocity structure of the crust in Shandong area was imaged by inverting 13781 arrival times from 1369 local events recorded by Shandong seismic network from 1975 to January 2014. Tomographic results reveal that the P-wave velocity structure of the crust of Shandong area has significant heterougeneities. The blocks on both sides of the Tanlu fault zone show different velocity structures, implying that the Tanlu fault may be a boundary fault. Our results also show that large-scale low velocity anomalies related to the Luxi large-scale detachment structure of Eocene exists below 20 km depth in the Luxi area, which was possibly associated with the westwards subduction of the Pacific plate that made the hot mantle material ascend along the Tanlu fault zone. The distribution of major earthquakes, most of which are of strike-slip type, spatially coincides with the transition zone between the low-velocity zone and high velocity zone, accompanied by the deep fault zone. These low-velocity anomalies may be related to the enriched fluid, which may weaken the lithospheric strength and make the tectonic stresses easier to accumulate there. The boundaries between the low-velocity and high-velocity anomalies may act as an elastic boundary along which tectonic stresses easily accumulate and transfer to the shallow depth of the crust and generate earthquakes.

SubtypeArticle
KeywordShandong Area Seismic Tomography 3d Crustal Structure Seismicity
Subject Area固体地球物理学
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.6038/cjg20160415
Indexed BySCI
Language英语
WOS KeywordNORTH CHINA CRATON ; UPPER-MANTLE ; SEISMIC TOMOGRAPHY ; WESTERN SHANDONG ; BENEATH ; REGION ; XENOLITHS ; JAPAN ; LITHOSPHERE ; SEA
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000373864400015
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/1564
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorWu Shi-Guo; Wu, Shi-guo
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Earthquake Adm Jinan City, Jinan 250001, Peoples R China
4.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Hainan Sanya 582000, Peoples R China
5.Earthquake Adm Shandong Prov, Jinan 250014, Peoples R China
Recommended Citation
GB/T 7714
Su Dao-Lei,Fan Jian-Ke,Wu Shi-Guo,et al. 3D P wave velocity structures of crust and their relationship with earthquakes in the Shandong area[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(4):1335-1349.
APA Su Dao-Lei.,Fan Jian-Ke.,Wu Shi-Guo.,Chen Chuan-Xu.,Dong Xiao-Na.,...&Wu, Shi-guo.(2016).3D P wave velocity structures of crust and their relationship with earthquakes in the Shandong area.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(4),1335-1349.
MLA Su Dao-Lei,et al."3D P wave velocity structures of crust and their relationship with earthquakes in the Shandong area".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.4(2016):1335-1349.
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