DOI: 10.1002/2013GL057401
论文题名: Finite frequency whole mantle P wave tomography: Improvement of subducted slab images
作者: Obayashi M. ; Yoshimitsu J. ; Nolet G. ; Fukao Y. ; Shiobara H. ; Sugioka H. ; Miyamachi H. ; Gao Y.
刊名: Geophysical Research Letters
ISSN: 0094-8388
EISSN: 1944-8119
出版年: 2013
卷: 40, 期: 21 起始页码: 5652
结束页码: 5657
语种: 英语
英文关键词: finite frequency
; mantle transition zone
; ocean bottom seismometer
; P wave tomography
; subducting slab
Scopus关键词: Finite frequencies
; Mantle transition zone
; Ocean bottom seismometer
; P waves
; Subducting slabs
; Frequency bands
; Seismic waves
; Seismographs
; Seismology
; Travel time
; Tomography
; data set
; finite difference method
; frequency analysis
; P-wave
; seafloor
; seismograph
; slab
; tomography
; transition zone
英文摘要: We present a new whole mantle P wave tomographic model GAP-P4. We used two data groups; short-period data of more than 10 million picked-up onset times and long-period data of more than 20 thousand differential travel times measured by waveform cross correlation. Finite frequency kernels were calculated at the corresponding frequency bands for both long- and short-period data. With respect to an earlier model GAP-P2, we find important improvements especially in the transition zone and uppermost lower mantle beneath the South China Sea and the southern Philippine Sea owing to broadband ocean bottom seismometers (BBOBSs) deployed in the western Pacific Ocean where station coverage is poor. This new model is different from a model in which the full data set is interpreted with classical ray theory. BBOBS observations should be more useful to sharpen images of subducted slabs than expected from simple raypath coverage arguments. Key Points We did a global P tomography using travel times including those from seafloors All data were analyzed using finite frequency kernels We revealed a stagnant slab in the MTZ detached from the downgoing Mariana slab ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887531761&doi=10.1002%2f2013GL057401&partnerID=40&md5=21532c09a571ed8a1196e9b9954108d7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5652
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan
Recommended Citation:
Obayashi M.,Yoshimitsu J.,Nolet G.,et al. Finite frequency whole mantle P wave tomography: Improvement of subducted slab images[J]. Geophysical Research Letters,2013-01-01,40(21).