| Project/Area Number |
26870073
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Geology
Solid earth and planetary physics
|
|---|
| Research Institution | Ibaraki University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
MOCHIZUKI NOBUTATSU 熊本大学, 理学部, 准教授 (60422549)
|
|---|
| Project Period (FY) |
2014-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
|---|
| Keywords | 広域テフラ / 古地磁気方位 / 大規模噴火 / 火山 / 大規模火砕流 / 対比 / 同時噴火 |
|---|
| Outline of Final Research Achievements |
The purpose of this study is to evaluate and develop the new method for tephra identification on the paleomagnetic directions. We developed a sampling procedure for accurate oriented samples of tephra layers. We made a guide for a plastic cube, which can be fixed on the surface of a tephra outcrop. This procedure makes it possible to obtain a mean remanent magnetization of sevaral tephra layers with a 95% confidence limit of about 2 to 3°, and we confirmed the method is useful for tephra identification. In addition, we proposed another new method for timescale estimation by quantifying paleomagnetic directions of successive tephra layers and comparing with a secular variation.
|
