日本地球惑星科学連合2024年大会

講演情報

[E] ポスター発表

セッション記号 S (固体地球科学) » S-CG 固体地球科学複合領域・一般

[S-CG41] 地殻表層の変動・発達と地球年代学/熱年代学の応用

2024年5月29日(水) 17:15 〜 18:45 ポスター会場 (幕張メッセ国際展示場 6ホール)

コンビーナ:末岡 茂(日本原子力研究開発機構)、長谷部 徳子(金沢大学環日本海域環境研究センター)、Tamer Taner Tamer(China Earthquake Administration)、田上 高広(京都大学大学院理学研究科)

17:15 〜 18:45

[SCG41-P02] Overview of thermochronological studies in and around the Japan Arc; towards Thermo2025 Conference in Kanazawa, Japan

*田上 高広1長谷部 徳子2末岡 茂3 (1.京都大学大学院理学研究科、2.金沢大学、3.日本原子力研究開発機構)

キーワード:低温領域熱年代学、日本弧、熱年代学国際会議2025、隆起ー削剥ー冷却 履歴

Recent progress of low-temperature thermochronology enables to analyze uplift-exhumation-cooling histories of the island-arc mountains with good confidence. This is particularly fruitful for studying the topographic evolution of the Japan Arc, because many of the Japanese mountains are started to uplift in recent time (e.g., late Pliocene to Quaternary) after an extended period of tectonic quiescence, and hence the resultant amount of total denudation is relatively small. The utility of the approach was first demonstrated by elucidating the uplift-exhumation-cooling process for some of the Japan Alps, in which average topographic changes of the tilted mountain block were quantitatively reconstructed by low-temperature thermochronology (Ref. 1-2). Such analyses also allow to estimate the background paleo-depth of neo-tectonic faulting episodes (Ref. 3).

In this presentation, we highlight recent and ongoing important thermochronological research in and around the Japan Arc (e.g., Ref. 4-6). In addition, we will promote the Thermo2025 conference and introduce its preliminary plans. The International Conference on Thermochronology has been held biyearly around the world and the International Standing Committee on Thermochronology (ISCT) determined that the 19th conference (Thermo2025) will be held in Kanazawa, Japan, on September 14-20th, 2025 (https://isct.sedoo.fr/meetings-2/). The local organizing committee, including the authors, have promoted the preparation of the conference in partnership with the domestic geoscience societies and international thermochronological communities. Pre-registration of Thermo2025 is now being accepted at the website (https://smartconf.jp/content/thermo2025). Those who are interested in the conference can soon receive the announcements by pre-registration.

References
1. Sueoka, S. et al. Island Arc 21, 32-52 (2012).
2. Sueoka, S. et al. Journal of Geophysical Research: Solid Earth 122, 6787-6810 (2017).
3. Tagami, T. Eds. M. G. Malusa, P. G. Fitzgerald, Fission track thermochronology and its application to geology, 221-233, (2019).
4. Sueoka, S. and Tagami, T., Island Arc 28, 1-8 (2019).
5. Fukuda, S. et al. Earth Planet Space, 72, 1-19 (2020).
6. King, G.E. et al. Geology, doi.org/10.1130/G50599.1 (2022).