2019 Fiscal Year Final Research Report
Thermal evolution modelling of crystalline rock and long term history of chemical characteristics within the rock body
| Project/Area Number |
16H06138
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Earth system and resources engineering
|
|---|
| Research Institution | Yamagata University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2016-04-01 – 2020-03-31
|
| Keywords | 高レベル放射性廃棄物の地層処分 / 花崗岩 / 熱進化モデル / 変質鉱物 |
|---|
| Outline of Final Research Achievements |
For safety evaluation of geological disposal of high-level radioactive waste, it is an important subject to reveal the long-term future forecast of fluid chemistry in a crystalline (granitic) rock. This study presented the procedures to reveal the long-term history of fluid chemistry in a crystalline rock on the basis of 1) thermal evolution model of granitic pluton (Yuguchi et al., 2016; 2017; 2019A) and 2) petrography and formation temperature and age of secondary minerals in the pluton (Yuguchi et al., 2019B).
|
| Free Research Field |
岩石学
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究の学術的意義は，マグマから貫入・定置・固化を経て深成岩へと至る熱進化モデルを構築したこと，また花崗岩体中の二次鉱物の岩石学的情報・熱年代学的情報を取得し，それらを組み合わせることで『花崗岩体内の流体の長期変遷の解明に必要な手法』を構築した点である。これらの知見や手法は地質環境変動のモデル化に際して有益な情報(地質履歴)になり得る。これは地層処分の長期安全性に関する不確実性を低減することに繋がる。
|
