DOI: 10.1016/j.epsl.2017.12.040
Scopus记录号: 2-s2.0-85044254561
论文题名: Tottori earthquakes and Daisen volcano: Effects of fluids, slab melting and hot mantle upwelling
作者: Zhao D. ; Liu X. ; Hua Y.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 485 起始页码: 121
结束页码: 129
语种: 英语
英文关键词: adakite
; earthquake
; Pacific slab
; Philippine Sea slab
; slab melting
; volcano
Scopus关键词: Geophysics
; Melting
; Tectonics
; Volcanoes
; Adakites
; Mantle upwellings
; Micro-earthquakes
; Pacific slab
; Philippine seas
; Seismic structure
; Slab melting
; Spreading ridge
; Earthquakes
; earthquake event
; earthquake mechanism
; lithospheric structure
; mantle structure
; melting
; microearthquake
; oceanic lithosphere
; Pacific plate
; Philippine Sea plate
; slab
; subduction zone
; three-dimensional modeling
; volcano
; Chugoku
; Honshu
; Japan
; Mount Daisen
; Tottori [Chugoku]
英文摘要: We investigate the 3-D seismic structure of source areas of the 6 October 2000 Western Tottori earthquake (M 7.3) and the 21 October 2016 Central Tottori earthquake (M 6.6) which occurred near the Daisen volcano in SW Japan. The two large events took place in a high-velocity zone in the upper crust, whereas low-velocity (low-V) and high Poisson's ratio (high-σ) anomalies are revealed in the lower crust and upper mantle. Low-frequency micro-earthquakes (M 0.0–2.1) occur in or around the low-V and high-σ zones, which reflect upward migration of magmatic fluids from the upper mantle to the crust under the Daisen volcano. The nucleation of the Tottori earthquakes may be affected by the ascending fluids. The flat subducting Philippine Sea (PHS) slab has a younger lithosphere age and so a higher temperature beneath the Daisen and Tottori area, facilitating the PHS slab melting. It is also possible that a PHS slab window has formed along the extinct Shikoku Basin spreading ridge beneath SW Japan, and mantle materials below the PHS slab may ascend to the shallow area through the slab window. These results suggest that the Daisen adakite magma was affected by the PHS slab melting and upwelling flow in the upper mantle above the subducting Pacific slab. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110044
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geophysics, Tohoku University, Sendai, 980-8578, Japan; College of Marine Geosciences, Ocean University of China, Qingdao, 266100, China; Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, 430074, China
Recommended Citation:
Zhao D.,Liu X.,Hua Y.. Tottori earthquakes and Daisen volcano: Effects of fluids, slab melting and hot mantle upwelling[J]. Earth and Planetary Science Letters,2018-01-01,485