DOI: 10.1002/2016GL068168
论文题名: Slab pileup in the mantle transition zone and the 30 May 2015 Chichi-jima earthquake
作者: Porritt R.W. ; Yoshioka S.
刊名: Geophysical Research Letters
ISSN: 0094-9638
EISSN: 1944-9369
出版年: 2016
卷: 43, 期: 10 起始页码: 4905
结束页码: 4912
语种: 英语
英文关键词: Chichi-jima earthquake
; mantle transition zone
; receiver functions
; slab morphology
Scopus关键词: Geophysics
; Seismic waves
; Seismology
; Tectonics
; Deep-focus earthquakes
; Mantle transition zone
; Receiver functions
; Slab morphology
; Source mechanisms
; Sub-surface materials
; Tectonic settings
; Transition zones
; Earthquakes
英文摘要: The 30 May 2015 Chichi-jima M8 earthquake is one of the largest deep focus earthquakes ever recorded and its depth of 682 km puts it near the base of the mantle transition zone. Before source mechanisms and slip models of this earthquake can be reliably assessed, a better understanding of the tectonic setting and structures of the region near the origin is required. Here we present evidence from receiver functions, a method of isolating subsurface material contrast with converted seismic waves, that the earthquake initiated within the upper mantle transition zone, above a significantly depressed 660 km phase boundary. Additionally, we observe multiple conversions within and below the transition zone, which we associate with seismic waves passing into and out of segments of the subducting Pacific plate. From this, we infer slab material is piling up at the base of the transition zone and segments are penetrating into the lower mantle. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971246335&doi=10.1002%2f2016GL068168&partnerID=40&md5=36a75f0f660583ffea954cefa2af4298
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10601
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Research Center for Urban Safety and Security, Kobe University, Kobe, Japan
Recommended Citation:
Porritt R.W.,Yoshioka S.. Slab pileup in the mantle transition zone and the 30 May 2015 Chichi-jima earthquake[J]. Geophysical Research Letters,2016-01-01,43(10).