Shock compression experiment of rocks: shear melting and seismogenic processes in deep earthquakes
| Project/Area Number |
23654159
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
OBATA MASAAKI 京都大学, 理学(系)研究科(研究院), 名誉教授 (20126486)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
堤 昭人 京都大学, 大学院・理学研究科, 助教 (90324607)
真下 茂 熊本大学, パルスパワー科学研究所 (90128314)
小澤 一仁 東京大学, 大学院・理学研究科, 教授 (90160853)
安東 淳一 広島大学, 大学院・理学研究科, 准教授 (50291480)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| Keywords | 地震 / 断層 / シュードタキライトタキライト / マントル / オリビン / イタリア / Balmuccia / 衝撃圧縮 / シュードタキライト / Ivrea Zone |
|---|
| Research Abstract |
We have succeeded in causing a frictional melting of olivine by shock compression experiment using single crystals of olivine. It was found that pulverzation occurred before melting and this sequence of event occurred around a rupture front that was caused by a shock compression.
We have also found a spinel corona that indicates a very high-temperature stage of pseudotachylyte of Balmuccia peridotite and demonstrated that problematical mylonitic pseudotachylyte has also a melting origin. By observing shear localizations in the field and microstructures, we also identified a very site where seismogenic fault had just nucleated and expanded, which made the study possible of the processes and mechanism of the initiation of a seismic rupture at the end of plastic deformation.
|
Report
(4 results)
Research Products
(22 results)
