Nanoscale characterization of mixed-layer chlorite minerals formation

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K14564
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 17030:Human geosciences-related
• Research Institution: Ehime University
• Principal Investigator: Inoué Sayako 愛媛大学, 地球深部ダイナミクス研究センター, 助教 (70867522)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 緑泥石 / 高分解能透過電子顕微鏡法 / 緑泥石地質温度計

Outline of Final Research Achievements

Chlorite is one of the most common minerals on Earth. The HRTEM observation of chlorite revealed that there is a structural constraint over the Fe-Mg ratio and ferric iron content in chlorite. This research elucidated that the chemical composition of chlorite is controlled by the formation condition when the Fe-Mg ratio and ferric iron content are below the limit defined by the structural stability of chlorite.

Free Research Field

鉱物学

Academic Significance and Societal Importance of the Research Achievements

本研究では、緑泥石の結晶構造と化学組成の関係を明確にすることで、緑泥石のこれら結晶化学的な特徴は、緑泥石自体の安定性と形成条件の両方に支配されることを示した。これは、緑泥石の結晶化学的な特徴を用いた形成環境推定の精度向上に繋がる知見であり、資源探査への貢献が期待できる。