Low-middle lattietudinal oceanic envrionments during the greatest mass extinction and its aftermath

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740340
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: TAKAHASHI Satoshi 東京大学, 理学(系)研究科(研究院), 助教 (60615251)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 大量絶滅 / ペルム紀 / 三畳紀 / 遠洋域深海相 / 地球化学 / コノドント / 放散虫

Outline of Final Research Achievements

Reconstruction of oceanic environment during Late Permian to Middle Triassic corresponding to the greatest mass extinction and its aftermath was conducted. Japanese deep-sea sedimentary rocks show record from the low lattitudinal oceanic area. Our study results indicate developments of hydrogen sulfide rich sea water condition at the end- Permian mass extinction and somewhat oxygen poor but not anoxic condition at the late Early Triassic. Deep-sea sedimentary records from New Zealand which located middle latitude show different history. Temporal development of hydrogen sulfide bearing water condition occurred at the mass extinction, but oxygen poor conditions are not detected at the late Early Triassic.These findings suggest that each oceanic areas have unique environmental histories during Permian to Triassic.

Free Research Field

地質学