Development of multi-elements triple stable isotope measurements and its application

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04108
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17040:Solid earth sciences-related
• Research Institution: Okayama University
• Principal Investigator: Tanaka Ryoji 岡山大学, 惑星物質研究所, 教授 (00379819)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 安定同位体 / 遷移金属元素

Outline of Final Research Achievements

High-precision isotopic measurements for oxygen, silicon, magnesium, calcium, nickel, and chromium were developed, and these methods were applied to the study of gas-melt reaction processes in the inner region of the protoplanetary disk, submarine hydrothermal system, the formation of the parent body of the asteroid Ryugyu, etc. In this project, multi-element isotopes were mainly used for these studies. In addition, the possibility to discriminate the equilibrium and kinetic isotope effects based on the relationship between two isotope ratios. With current analytical precision, only oxygen isotopes are applicable, and further improvement of analytical precision is required for the use of other elements.

Free Research Field

地球惑星科学

Academic Significance and Societal Importance of the Research Achievements

安定同位体は、様々な物質の反応過程を解析するための強力なツールである。本研究で開発された、微少量かつ様々な化学組成を持つ試料に応用可能な多元素同位体分析法は、地球惑星科学だけでなく他の研究分野への応用も可能である。また、2つの同位体比を用いて平衡論的または速度論的反応過程を判別する方法は、現在は限られた元素にのみ有効だが、さらなる技術革新により、より広範囲の元素にこの手法を適用可能にすることが期待される。