Petrologic structure of the strain concentration zone along the eastern margin of Japan Sea
| Project/Area Number |
23340153
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Geology
|
|---|
| Research Institution | Yokohama National University |
|---|
Principal Investigator |
MASAHIRO Ishikawa 横浜国立大学, 環境情報研究科(研究院), 教授 (70232270)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SATO Hiroshi 東京大学, 地震研究所, 教授 (00183385)
BAN Masao 山形大学, 理学部, 教授 (50208724)
|
|---|
| Project Period (FY) |
2011-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2012: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2011: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
|
|---|
| Keywords | ひずみ集中帯 / 地殻 / 下部地殻 / 地殻構造 / 日本海東縁 / マントル / 弾性波速度 |
|---|
| Outline of Final Research Achievements |
This study presents a new view of the constituent rocks in the lower crust and uppermost mantle beneath the strain concentration zone along the eastern margin of Japan Sea of northeast Japan based on the P- and S-wave velocities obtained by seismic tomography and comparisons with the experimentally determined velocities of rock-forming minerals. We inferred that orthpyroxene exist in the high velocity lower crust as a main constituent mineral beneath the the eastern margin of Japan Sea of northeast Japan, underlain by high Vp/Vs anomaly (clinopyroxenite) in the uppermost mantle. These inferences suggest that the Miocene rift-related magmatism produced the high velocity lower crust and the high Vp/Vs uppermost mantle. Considering the regional distribution of these unusual uppermost mantle rocks, strain concentration is inferred to have related with rheological property of the unusual uppermost mantle.
|
Report
(5 results)
Research Products
(51 results)
-
-
-
-
-
-
-
[Journal Article] Petrologic characteristics of the newest stage in Azuma volcano group, Northeast Japan2014
Author(s)
Ban, M., Matsui, R., Yamamoto, T., Iwata, N., Fujinawa, A., Nakashima, K.
-
Journal Title
International Journal of Eruptive History and Informatics
Volume: 未定
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Sr-Nd-Pb isotope compositions of frontal arc stratovolcanoes in Northeast Japan arc2013
Author(s)
Ban M, Takahashi T, Hirahara Y, Ohba T, Fujinawa A, Hayashi S, Yoshida T, Kimura J-I, Miyazaki T, Chang Q, Senda R, Tatsumi Y
Organizer
IAVCEI 2013 Joint Assembly
Place of Presentation
鹿児島
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
