2011 Fiscal Year Final Research Report
Mechanism and rate of magma degassing : Toward an understanding of bifurcation of explosive-effusive silicic volcanism
| Project/Area Number |
21684025
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
OKUMURA Satoshi 東北大学, 大学院・理学研究科, 助教 (40532213)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Keywords | 火山現象 |
|---|
| Research Abstract |
A factor controlling the style and explosivity of volcanic eruptions is magma degassing during its ascent in a volcanic conduit. To understand the mechanism of the degasing and determine the degassing rate, we experimentally simulated magma ascent and observed in situ the deformation of magma by using originally developed deformation apparatus which was built up on synchrotron radiation X-ray imaging system in SPring-8. The experimental results demonstrated that the degassing rate from flowing magma was high. This result implies that some unknown mechanisms inhibit the degassing for explosive volcanism.
|
