JpGU-AGU Joint Meeting 2017

講演情報

[EJ] ポスター発表

セッション記号 B (地球生命科学) » B-PT 古生物学・古生態学

[B-PT05] [EJ] 地球史解読:冥王代から現代まで

2017年5月24日(水) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:小宮 剛(東京大学大学院総合文化研究科広域科学専攻)、加藤 泰浩(東京大学大学院工学系研究科システム創成学専攻)、鈴木 勝彦(国立研究開発法人海洋研究開発機構・海底資源研究開発センター)

[BPT05-P15] Lithological and geochemical features of the Permian-Triassic boundary at the Gujo-Hachiman section in the Mino-Tamba belt, central Japan

*矢野 萌生1藤永 公一郎2,1安川 和孝1,2野崎 達生3,1,4黒田 潤一郎5桑原 希世子6加藤 泰浩1,2,3 (1.東京大学・工学系研究科、2.千葉工業大学・次世代海洋資源研究センター、3.海洋研究開発機構、4.神戸大学・理学研究科、5.東京大学・大気海洋研究所、6.芦屋大学・臨床教育学部)

キーワード:ペルム紀/トリアス紀境界、黒色頁岩、チャート、郡上八幡、海洋無酸素化

The most significant mass extinction event in the Phanerozoic era occurred across the Permian-Triassic boundary (PTB; ca. 252 Ma). However, the entire picture of this global environmental crisis has not reached a consensus, as well as a culprit that invoked the catastrophe. The PTB sections in the Japanese accretionary complex were primarily deposited in the deep-sea of the superocean Panthalassa, hence it is very likely to have recorded signatures of the global-scale environmental change. Therefore, a number of geological, geochemical, and paleontological researches have targeted them to deduce a series of environmental shift during the event (Isozaki, 1997; Kato et al., 2002; Takahashi et al., 2009). The Gujo-Hachiman section located in the Mino-Tamba belt, central Japan, has a continuous outcrop across the PTB (Kuwahara et al., 1998; Yao et al., 2001). In the present study, to decipher the marine environmental change across the PTB, we report the lithological and geochemical features on the basis of thin-section descriptions and chemical analyses of total organic carbon and bulk chemical compositions of the Gujo-Hachiman section.