Earth system changes across Superanoxia decoded by statistical analyses

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K14596
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 17050:Biogeosciences-related
• Research Institution: Kyushu University (2023); Kochi University (2020-2022)
• Principal Investigator: Soda Katsuhito 九州大学, 理学研究院, 学術研究員 (40850459)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 地質学

Outline of Final Research Achievements

Deep-sea pelagic sedimentary rocks are composed of a complex mixture of various source materials, which makes simple interpretation impossible. In this study, we aim to decode the Earth system changes across the Superanoxia by geochemical data analysis of deep-sea pelagic sedimentary rocks. We have also established a microfossil-carbon isotope stratigraphy and a high-resolution age model. These are integrated by data analysis to decode the Earth system changes across the Superanoxia.

Free Research Field

地質学

Academic Significance and Societal Importance of the Research Achievements

超海洋無酸素事変における古環境復元では，データ間の対比・統合が適切ではないのが現状である．遠洋深海堆積岩はグローバルな環境変動を反映しやすい一方，多様で複雑な起源を示すため絵合わせ的解釈が通用しない．本研究ではその特徴を逆手に取り，データ解析を駆使することで，各起源物質を一度に分離・抽出することが可能である．そのため本研究は，超海洋無酸素事変における地球システム変動を解明する寄与するデータセットを世界に向けて発信できる．