| Project/Area Number |
23540564
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Petrology/Mineralogy/Science of ore deposit
|
|---|
| Research Institution | National Institute of Advanced Industrial Science and Technology |
|---|
Principal Investigator |
TOMIYA Akihiko 独立行政法人産業技術総合研究所, 地質情報研究部門, 主任研究員 (30357553)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
TAKEUCHI Shingo 一般財団法人電力中央研究所, 地球工学研究所・地圏科学領域, 研究員 (50397030)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Keywords | マグマ混合 / マグマ注入 / タイムスケール / 磁鉄鉱斑晶 / 元素拡散 / 霧島山新燃岳2011年噴火 / マグマ溜まり / 軽石噴火 |
|---|
| Research Abstract |
We analyzed eruptive products of the 2011 eruption of Shinmoedake, Kirishima volcanic group, Japan, in order to investigate the magmatic processes that triggered the volcanic eruption. The eruption is suitable for such investigation because we have abundant geophysical observations; e.g., seismicity and crustal deformation. We found that the crystals in the products recorded pre-eruptive magmatic processes as chemical zoning within several tens of microns from the crystal rims. We revealed that (1) high-temperature magma mixed into a pre-existing magma several days before the eruption; (2) an overturn of the pre-existing magma chamber was the trigger of the eruption; and (3) the overturn could not been detected both by seismicity and crustal deformation.
|
