JpGU-AGU Joint Meeting 2020

Session information

[E] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS04] An asteroid impact in SE Asia at 0.8 Ma and its effect on the environment and biota

convener:Ryuji Tada(Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo), Paul A Carling(University of Southampton), Wickanet Songtham(Nakhon Ratchasima Rajabhat University, Thailand ), Kerry Sieh(Nanyang Technological University)

The impact of a small celestial body in Indochina Peninsula at 0.79 Ma, known as Australasia Tektite event (AATE), has been known for more than half a century due to the wide-spread distribution of tektite. Yet, the source crater of the tektite is not yet found inspite of the probable large size (>30 km in diameter) of crater, its relatively young age, and intensive search by many researchers. However, the situation is changing rapidly during the last several years and the area for the location of the crater is gradually narrowed down. Also, the evidence of environmental perturbation and possible relation with local extinction and migration of hominid and animals has been suggested recently.
In addition, because its timing is close to the Matsuyama/Brunhes paleomagnetic reversal event and in the middle of glacial lowstand during MIS 20, precise age of AATE and its relation with glacio-eustatic sea level changes should have a significant implication to Quaternary chronostratigraphy.
For these reasons, we propose a special interdisciplinary session on the location, mode, magnitude, and exact timing of the AATE impact and its possible effect on the environment and biota
The topic should be of major interest to geologists, sedimentologists, planetary scientists, paleontologists, paleoclimatologists, anthropologists, and so on, especially to those working in SE Asia. Thus adequate topic for JpGU-AGU joint meeting.

*Yu Chang1, Masahiro KAYAMA2, Eiichi Tajika1, Yasuhito Sekine3, Toshimori Sekine4, Hirotsugu nishido5, Takamichi Kobayashi6 (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3.Earth-Life Science Insitute, Tokyo Institute of Technology, 4.Center for High Pressure Science and Technology Advanced Research, 5.Research Institute of Natural Science, Okayama University of Science, 6.National Institute for Materials Science)

*Toshihiro Tada1, Masahiro KAYAMA2, Yu Chang1, Akira Miyake3, Yohei Igami4, Ryuji Tada1,5,6, Paul A Carling7, Wickanet Songtham8, Eiichi Tajika1 (1.Department of Earth and Planetary Science, The University of Tokyo , 2.Department of Multi-Disciplinary Sciences, The University of Tokyo , 3.Division of Earth and Planetary Sciences, Kyoto University , 4.Institute of Materials and Systems for Sustainability, Nagoya University, 5. Planetary Exploration Research Center, Chiba Institute of Technology, 6.Research Center for Earth System Science, Yunnan University, 7.Geography and Environmental Science, University of Southampton, 8. Northeastern Research Institute of Petrified Wood & Mineral Resources, Nakhon Ratchasima Rajabhat University)

*Kerry Sieh1, Jason Herrin1, Dayana Schonwalder Angel1, Vanpheng Sihavong2, Brian Jicha3, Brad Singer3, Weerachat Wiwegwin4, James Daniel Paul Moore1, Paramesh Banerjee1, Tawachai Chualaowanich4, Punya Charusiri5 (1.Earth Observatory of Singapore, Nanyang Technological University, 639798 Singapore, 2.Department of Geology and Mines, Ministry of Energy and Mines, Vientiane, Lao People’s Democratic Republic, 3.Department of Geoscience, University of Wisconsin–Madison, Madison, WI 53706, 4.Department of Mineral Resources, Ministry of Natural Resources and Environment, Ratchatewi, 10400 Bangkok, Thailand, 5.Department of Geology, Chulalongkorn University, Khet Pathumwan, 10330 Bangkok, Thailand)