2017 Fiscal Year Final Research Report
Study of interplate coupling with collision giant Amami platus around Ryokyu arc
| Project/Area Number |
25287112
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
寺川 寿子 名古屋大学, 環境学研究科, 講師 (30451826)
伊藤 武男 名古屋大学, 環境学研究科, 准教授 (40377982)
佐々木 圭一 金沢学院大学, 基礎教育機構, 准教授 (50340021)
鷺谷 威 名古屋大学, 減災連携研究センター, 教授 (50362299)
|
|---|
| Project Period (FY) |
2013-04-01 – 2018-03-31
|
| Keywords | 地殻変動・海底変動 / テクトニクス / 超巨大地震 / 海岸段丘 |
|---|
| Outline of Final Research Achievements |
In the subduction zone with back-arc expansion, crustal deformation was observed both effects due to the subducted oceanic plate and expansion of back-arc. In order to identify each component of crustal deformations, we carry out GNSS observation at Yoktoshima and leveling survey in Kikaijima island. As result, we obtain the spatial distribution of interplate coupling and tilt vector at the kikai island. In addition, we estimate 6000 BP at highest marine terrace in north region of Kikaijima island by the geological survey. As a result of modeling for the survey result and the occurrence interval of the past earthquakes using two dimensional finite element method, we obtain that the long-term uplift at kikai-jima is explained by by the geometry of subduction plate. In order to understand the time evolution of vertical deformation, we reveal that the viscoelastic structure at the mantle wedge have important role.
|
| Free Research Field |
固体地球物理学
|
