2010 Fiscal Year Final Research Report
Conditions of magma chambers that cause large explosive eruptions
| Project/Area Number |
20540474
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| 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 National Institute of Advanced Industrial Science and Technology, 地質情報研究部門, 主任研究員 (30357553)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | マグマ・火成岩 / マグマ溜まり / 噴火 / 火山 / 実験岩石学 |
|---|
| Research Abstract |
Petrographic study and high-pressure experiments were conducted on eruptive products of large explosive eruptions that had occurred at Usu volcano, Tarumai volcano and Hokkaido-Komagatake volcano during 17th century. Conditions (temperatures, pressures and water contents) of the magma chambers beneath these volcanoes were estimated. Magma mixing process between a new high-temperature magma and a pre-existing low-temperature magma was revealed for each volcano. The time of the magma mixing was also estimated for each pumice eruption.
|
