| Project/Area Number |
17K05699
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Petrology/Mineralogy/Economic geology
|
|---|
| Research Institution | Akita University |
|---|
Principal Investigator |
Ishiyama Daizo 秋田大学, 国際資源学研究科, 教授 (30193361)
|
|---|
| Project Period (FY) |
2017-04-01 – 2022-03-31
|
| Project Status |
Completed (Fiscal Year 2021)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
|---|
| Keywords | 流体包有物 / 酸素同位体比 / レーザーアブレーション / 流体の起源 / 元素運搬プロセス / エキシマ-レーザー |
|---|
| Outline of Final Research Achievements |
In this study, the problem when water sealed in a glass capillary tube reacts with fluorine gas by laser ablation in a fluorine atmosphere was examined to analyze the oxygen isotope ratio of fluids in fluid inclusions. It was confirmed that if the sample chamber was filled with fluorine gas and allowed to stand for a long time before the water was extracted from the fluid inclusions, contamination of the water from the adsorption of the container could be suppressed to about 0.1 micromole. In addition, when a hole is opened in a glass capillary tube by laser ablation, fluorine gas enters the capillary and reacts with water in the capillary to form oxygen. However, if the pressure of the oxygen formed in capillary is the same as the pressure of the fluorine outside, the slow exchange of fluorine gas outside the capillary and oxygen inside the capillary may make it difficult for the fluorine gas to come into contact with liquid water.
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究では，フッ素雰囲気下でレーザー気化法による流体包有物からの極微少量の流体の抽出のための基礎的な検討を行った．本抽出法が可能になると，流体の酸素同位体比情報に基づき，熱水系の進化や鉱物資源の成因関して新しい資源形成モデルが提案され，地下資源の探査が効率的に進められ，資源の有効利用に資する．この酸素同位体比情報の取得のためには，流体包有物の流体以外からの水の汚染を抑制する必要がある．これまでの研究では，この点について問題の明確化と対策についての検討が不十分であった．この点を解明することは，今後の安定同位体比測定の微小領域分析の発展を進めるためには不可欠であり，学術的な意義が大きい．
|
