SCSIO OpenIR  > 中科院边缘海地质重点实验室
Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block
Lu, ZY; Qiu, XL; Ma, XJ; Fang, LH;;
AbstractWe obtained 18968 reliable P wave relative traveltime residuals by adaptive stacking technique based on waveform cross-correlation of 256 distant earthquake records. The teleseismic waveform data were recorded by 94 permanent seismic stations belonging to seismic networks of Guangdong and neighboring provinces. The P wave velocity structure beneath the Leiqiong volcano and Cathaysia block down to 450 km depth was determined by the Fast Marching Teleseismic Tomography (FMTT). The results show an obvious low-velocity anomaly beneath the Leiqiong volcano from 100 km to 450 km depth. This low-velocity anomaly extends to the Cathaysia block with depth increasing. It is suggested that this low-velocity anomaly is caused by the upwelling of thermal materials of the Hainan plume, and the Leigiong volcano is an intraplate hot spot, which is consistent with previous results of body-wave tomography and receiver function studies. It is also inferred that the Hainan plume dips to the northeast and probably extends to 450 km depth from the pattern of the low-velocity anomalies. The low-velocity anomalies beneath the Cathaysia block is likely produced by the northeastward erosion of upwelling hot materials of the Hainan plume. The results may also imply that the lithospheric thickness of the study area tends to be thinner from the land to the sea.
Department[Lu Zuo-Yong; Qiu Xue-Lin] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Lu Zuo-Yong; Ma Xiao-Jing] Guangdong Earthquake Agcy, China Earthquake Adm, Key Lab Earthquake Monitoring & Disaster Mitigat, Guangzhou 510070, Guangdong, Peoples R China; [Fang Li-Hua] China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China; [Lu Zuo-Yong; Qiu Xue-Lin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Subject AreaGeochemistry & Geophysics
WOS KeywordLeigiong volcano ; Hainan plume ; Cathaysia block ; 3D velocity structure ; Seismic tomography
Funding ProjectMSG
Document Type期刊论文
Recommended Citation
GB/T 7714
Lu, ZY,Qiu, XL,Ma, XJ,et al. Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,60(12):4569-4579.
APA Lu, ZY,Qiu, XL,Ma, XJ,Fang, LH,,& P-wave traveltime tomography for the Leigiong volcano and Cathaysia block.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(12),4569-4579.
MLA Lu, ZY,et al."Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.12(2018):4569-4579.
Files in This Item:
File Name/Size DocType Version Access License
雷琼火山与华夏块体的远震P波走时成像.p(4553KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.