||Triassic and Jurassic radiolarian response to global catastrophic events in the Panthalassa Ocean, as recorded in the Mino Belt, central Japan
Onoue, Tetsuji ,
Hori, Rie S.Kojima, Satoru
Science reports of Niigata University. (Geology)
69 , 2017-10 , 新潟大学理学部
InterRed XV in Niigata 2017 Niigata University (JAPAN) Oct/22-Oct/27, 2017
The field trip will focus on the radiolarian response to global catastrophic events (e.g., bolide impact, large-scale volcanism, and anoxia) recorded in Triassic and Jurassic radiolarian chert of the Mino Belt, central Japan. The radiolarian chert of the Mino Belt records the sedimentary history of an oceanic plate in the Panthalassa Ocean prior to accretion at the trench. The topics presented and discussed in the field are: (1) the end-Permian mass extinction and recovery from the event; (2) Early Triassic anoxia and subsequent recovery in the Middle Triassic; (3) paleoenvironmental changes across the Early–Late Carnian boundary (Carnian Pluvial Event); (4) collapse of marine ecosystems triggered by a Norian impact event; (5) ocean acidification at the Triassic–Jurassic boundary; and (6) Early Jurassic (Toarcian) anoxia and the formation of black chert. In addition to these topics, this trip will consider aspects of the accretion process of oceanic plate sediments during the Middle to Late Jurassic.