[B-CG06] Decoding the history of Earth: From Hadean to the present

Wed. May 28, 2025 9:00 AM - 10:30 AM 301A (International Conference Hall, Makuhari Messe)

convener:Tsuyoshi Komiya(Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo), Fumito Shiraishi(Earth and Planetary Systems Science Program, Graduate School of Advanced Science and Engineering, Hiroshima University), Yusuke Sawaki(The University of Tokyo), Teruhiko Kashiwabara(Japan Agency for Marine-Earth Science and Technology), Chairperson:Fumito Shiraishi(Earth and Planetary Systems Science Program, Graduate School of Advanced Science and Engineering, Hiroshima University), Tsuyoshi Komiya(Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo)

The latest results of Earth's evolution and geological processes through 4.6 billion years from Hadean to Modern, based on various approaches including fieldworks, chemical analyses, experiments and computer simulation, will be presented. In this session, we aim to discuss and understand causal relationships and interplay among the evolution of Earth's deep interior, changes in the surface environments, and development and evolution of life. Wide-ranging topics are accepted.

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9:00 AM - 9:15 AM

[BCG06-01] Independent component analysis of sedimentary rocks through geologic time: Coevolution of the Earth’s surface environment with life

*Tsuyoshi Komiya¹, Kaori Nakai¹ (1.Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo)

9:15 AM - 9:30 AM

[BCG06-02] Phosphorus cycles in the Precambrian and its implication for the Earth's oxygenation

*Ryosuke Nagao¹, Kaori Nakai², Tsuyoshi Komiya^1,2 (1.The University of Tokyo School of Science Department of Earth and Planetary Science , 2.Graduate School of Arts and Sciences, The University of Tokyo)

9:30 AM - 9:45 AM

[BCG06-03] Data compilation and photochemical model of sulfur mass-independent fractionation: Atmospheric evolution in the Archean

*Ryota Mihori¹, Takayuki Ushikubo², Kenji Shimizu², Tsuyoshi Komiya¹ (1.Graduate School of Arts and Sciences, The University of Tokyo, 2.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

9:45 AM - 10:00 AM

[BCG06-04] Thermodynamic simulations of Algoma-type banded iron formation deposition: implications for Archean seawater and hydrothermal fluid chemistry

*Yuki ISHIHARA¹, Tsuyoshi Komiya² (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Graduate School of Arts and Sciences, The University of Tokyo)

10:00 AM - 10:15 AM

[BCG06-05] Mesoarchaean continental weathering and Au transport recorded in Witwatersrand pyrite

*Andrea Agangi^1,2, Axel Hofmann², Emilie Thomassot³, Giuliana da Costa² (1.Akita University, 2.University of Johannesburg, 3.Université de Lorraine)

10:15 AM - 10:30 AM

[BCG06-06] MALDI-TOFMS 2D-mapping analysis of indigenous biomarkers for oxygenic photosynthesis preserved in the Archean and Proterozoic black shales

Kei-ichiro Ishikawa¹, Hiroki Saito¹, *Kosei E. Yamaguchi^1,2, Tomoyo Okumura³, Akira Ijiri⁴ (1.Toho University, 2.NASA Astrobiology Institute, 3.Kochi University, 4.Kobe University)

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