[M-GI32] Cretaceous Earth Dynamics and Climate in Asia: Insights from IGCP Project 679

2026年5月24日(日) 10:45 〜 12:15 展示場特設会場 (5) (幕張メッセ国際展示場 7・8ホール)

座長:張天逸(早稲田大学)、塚田結衣(筑波大学人間総合科学学術院)

The Cretaceous greenhouse world was characterized by extreme warmth, high CO2 levels, oceanic anoxic events, and significant ecosystem changes. Asia provides extensive sedimentary, fossil, and geochemical archives that record these phenomena across diverse settings. IGCP Project 679 (Cretaceous Earth Dynamics and Climate in Asia) aims to integrate stratigraphic, paleontological, geochemical, and modeling approaches to reconstruct climate variability, ocean circulation, and Earth system feedback in this interval. This JpGU-AGU session, organized as a project workshop, will present new findings from across Asia while promoting global collaboration. Topics include stratigraphic correlation, high-resolution geochemical proxies, records of oceanic anoxic events and mass extinctions, paleogeographic reconstructions, and terrestrial ecosystem responses. The session encourages participation from students, early-career researchers, and international collaborators. Discussion time will be provided to strengthen the links between IGCP 679 members and the wider scientific community, thereby enhancing the integration of Asian records into global Cretaceous climate research.

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10:45 〜 11:00

[MGI32-01] Progress of IGCP 679: Cretaceous Earth Dynamics and Climate in Asia

*Gang Li¹, Takashi Hasegawa², Dae Kyo Cheong³, Vandana Prasad⁴ (1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, PR China, 2. Department of Earth Sciences, Faculty of Science, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan, 3. Department of Geology, College of Natural Sciences, Kangwon National University, Chunchon, Kangwon-do, 200-701, South Korea, 4. Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow 226007, India)

11:00 〜 11:15

[MGI32-02] Osmium isotopic record across the Aptian–Albian boundary in the Lower Cretaceous Sanchu Group, central Japan

*塚田結衣¹、松本廣直¹、藤野滋弘¹、鈴木勝彦²、佐野貴司³、白井厚太朗⁴、服部竜士⁴、弓場茉裕⁴、古屋俊和⁴、四宮七瀬⁴、津田和忠⁴ (1. 筑波大学、2. 海洋研究開発機構、3. 国立科学博物館、4. 東京大学大気海洋研究所)

11:15 〜 11:30

[MGI32-03] Late Cretaceous environmental changes in the northwestern Pacific margin inferred from fluctuations in organic matter composition

*都丸大河¹、高嶋礼詩²、マリウスニェフヴェドヴィチ³、イレネウスワラシュレック³、荒尾眞成¹、黒柳あずみ² (1. 東北大学院理学研究科地学専攻、2. 東北大学学術資源研究公開センター東北大学総合学術博物館、3. ワルシャワ大学地質学部)

11:30 〜 11:45

[MGI32-04] High-resolution bio- and carbon isotope stratigraphy of the Turonian/Coniacian and Santonian/Campanian boundaries in the NW Pacific.

*髙橋恒佑¹、高嶋礼詩²、Walaszczyk Ireneusz³、山中寿朗⁴、都丸大河¹、黒柳あずみ² (1. 東北大学大学院理学研究科地学専攻、2. 東北大学学術資源研究公開センター東北大学総合学術博物館、3. Faculty of Geology, University of Warsaw、4. 東京海洋大学学術研究院海洋資源環境学部門)

11:45 〜 12:00

[MGI32-05] Insignificant coupling between terrestrial carbon cycle and global climate during the hothouse Oceanic Anoxic Event 2 of the Cretaceous

*Xianghui Li¹, Jingyu Wang¹, Jiawei Wang¹, Chenyu Zheng¹ (1. Nanjing University)

12:00 〜 12:15

[MGI32-06] Atmospheric CO2 during the Aptian: New Evidence from Sedimentary Carbon Isotopes in NE China

*Jianfang Hu¹, Hanqing Yang^1,2, Jian Chen¹, Ziyi Tang^1,2 (1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 2. University of Chinese Academy of Sciences)

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