Two-Dimensional Thermal Modeling of the Philippine Sea Plate Subduction in Central Japan: Implications for Gap of Low-Frequency Earthquakes and Tectonic Tremors | |
Suenaga, N (Suenaga, Nobuaki)1; Yoshioka, S (Yoshioka, Shoichi)1,2; Matsumoto, T (Matsumoto, Takumi)3; Manea, VC (Manea, Vlad C.)4,5; Manea, M (Manea, Marina)4,5; Ji, YF (Ji, Yingfeng)6,7 | |
Source Publication | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH |
2019 | |
Volume | 124Issue:7Pages:6848-6865 |
DOI | 10.1029/2018JB017068 |
Abstract | We performed 2-D high-resolution thermomechanical numerical simulations associated with subduction of the Philippine Sea (PHS) plate in central Japan, where a well-defined gap of low-frequency earthquakes (LFEs) and tectonic tremors (TTs) is observed. We investigate the complex relationships among megathrust earthquakes, LFEs, TTs, and interplate temperature distributions and dehydrations caused by phase transformations of hydrous mid-ocean ridge basalt (MORB) of the oceanic crust and ultramafic rock of the slab mantle. Our models predict a temperature range of 480-600 degrees C corresponding to both active LFEs and TTs regions and their gap region located on the upper surface of the PHS plate. A moderate amount of fluids (<0.8 wt%) is released due to phase transformations of the hydrous MORB near the thermally estimated seismogenic zone on the upper surface of the PHS plate. Hydrous MORB was found to transform from greenschist to epidote amphibole, releasing a small amount of fluids (>0.3 wt%) near the belt-like form regions of LFEs and TTs. We found that the total amount of dehydrated water near the active region of LFEs and TTs is larger than that near the gap of LFEs and TTs. Our modeling results show that this difference stems from the presence of the phase transformation from epidote amphibole to eclogite in the former, and it may play a significant role for the occurrence of LFEs and TTs. The difference in the amount of released fluid between the active and gap regions of LFEs and TTs may be related to their generation mechanism. |
Subject Area | Geosciences |
WOS ID | WOS:000481819500036 |
Language | 英语 |
Indexed By | SCI |
Keyword | Southwest Japan Episodic Tremor Seismogenic Zone Nankai Trough Upper Surface Beneath Dehydration Temperature Pacific Deep |
WOS Research Area | Geochemistry & Geophysics |
WOS Subject | Geochemistry & Geophysics |
Cooperation Status | 国际 |
ISSN | 2169-9313 |
Department | 大陆碰撞与高原隆升重点实验室 |
URL | 查看原文 |
Publisher | AMER GEOPHYSICAL UNION |
Subtype | Article |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itpcas.ac.cn/handle/131C11/9241 |
Collection | 图书馆 |
Corresponding Author | Suenaga, N (Suenaga, Nobuaki) |
Affiliation | 1.Kobe Univ, Grad Sch Sci, Dept Planetol, Kobe, Hyogo, Japan; 2.Kobe Univ, Res Ctr Urban Safety & Secur, Kobe, Hyogo, Japan; 3.Natl Res Inst Earth Sci & Disaster Resilience, Tsukuba, Ibaraki, Japan; 4.Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro, Mexico; 5.Romanian Acad, Astron Inst, Bucharest, Romania; 6.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China; 7.Chinese Acad Sci, Inst Tibetan Plateau, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China. |
Recommended Citation GB/T 7714 | Suenaga, N ,Yoshioka, S ,Matsumoto, T ,et al. Two-Dimensional Thermal Modeling of the Philippine Sea Plate Subduction in Central Japan: Implications for Gap of Low-Frequency Earthquakes and Tectonic Tremors[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(7):6848-6865. |
APA | Suenaga, N ,Yoshioka, S ,Matsumoto, T ,Manea, VC ,Manea, M ,&Ji, YF .(2019).Two-Dimensional Thermal Modeling of the Philippine Sea Plate Subduction in Central Japan: Implications for Gap of Low-Frequency Earthquakes and Tectonic Tremors.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(7),6848-6865. |
MLA | Suenaga, N ,et al."Two-Dimensional Thermal Modeling of the Philippine Sea Plate Subduction in Central Japan: Implications for Gap of Low-Frequency Earthquakes and Tectonic Tremors".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.7(2019):6848-6865. |
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