中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 中科院边缘海地质重点实验室  > 期刊论文
学科主题: Geochemistry & Geophysics
题名: Joint inversion of P-wave velocity and Vp-Vs ratio: imaging the deep structure in NE Japan
作者: Zhi, W
关键词: Seismic tomography ; P and S source-receiver pairs ; Pacific subduction zone ; Mantle wedge
刊名: APPLIED GEOPHYSICS
发表日期: 2014
卷: 11, 期:2, 页:119-127
收录类别: sci
部门归属: [Zhi, Wang] Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China ; [Zhi, Wang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: 海洋地质
资助者: Chinese Academy of Sciences [17314059]; Natural Science Foundation of China [41372229]; Sichuan Province Outstanding Youth Foundation [2010JQ0033. KYTD201002]; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection; Research Foundation for the Doctoral Program of Higher Education of China [20115122110007, 20125122110002]
摘要: A new inversion scheme is presented to obtain three-dimensional images of P-wave velocity (Vp) and P S-wave velocity ratio (Vp/Vs) using P- and S-phase pairs, i.e., the same source receiver pairs for the P- and S-wave arrival-time data. The S-wave velocity (Vs) was separately inverted using the S-phase arrival times. The earthquake hypocenters were simultaneously relocated in the joint inversion. The method considers the Vp/Vs anomaly as a model parameter in the inversion. The proposed method thus provides a more robust calculation of the Vp/Vs anomaly than the conventional method of dividing Vp by Vs. The method also takes into account the ray path difference between P- and S-waves, and hence yields a less biased Vp Vs ratio than the method of inverting S P-wave data for Vp and Vp/Vs anomalies under the assumption of identical P and S ray paths. The proposed method was used to image the crust and upper mantle in northeastern (NE) Japan taking advantage of a large number of high-quality arrival times of P- and S-wave source receiver pairs. The inverted structures suggest that the subducting slab of the Pacific plate is an inclined zone of high-Vp and Vs anomalies with low Vp/Vs perturbation. The mantle wedge is characterized by low-Vp, low-Vs, and high-Vp/Vs anomalies at shallow depths beneath active volcanoes. These features are also observed at greater depths in the back-arc region. Although these features have been previously reported, the Vp/Vs anomaly pattern obtained in this study shows much less scatter and is much better correlated with the seismic velocity perturbation patterns than previous studies. The proposed method can be used, in conjunction with velocity anomaly patterns, to quantify thermal processes associated with plate subduction.
原文出处: 查看原文
WOS记录号: WOS:000339307200001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10620
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

Files in This Item:

There are no files associated with this item.


Recommended Citation:
Zhi, W.Joint inversion of P-wave velocity and Vp-Vs ratio: imaging the deep structure in NE Japan,APPLIED GEOPHYSICS,2014,11(2):119-127
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhi, W]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhi, W]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace