Japan Geoscience Union Meeting 2019

Session information

[E] Oral

P (Space and Planetary Sciences ) » P-CG Complex & General

[P-CG22] Shock responses of planetary materials elucidated from meteorites and dynamic compression experiments

Tue. May 28, 2019 3:30 PM - 5:00 PM A03 (TOKYO BAY MAKUHARI HALL)

convener:Toshimori Sekine(Center for High Pressure Science and Technology Advanced Research), Takuo Okuchi(Institute for Planetary Materials, Okayama University), Chairperson:Takuo Okuchi(Okayama University), Yongjae Lee(Yonsei University)

Impact phenomena had played essential roles in the process of planetary evolution. Recent analytical and experimental developments reveal a new prospective on the effects of shock-compression process for planetary materials. For deeper understanding of such shock effects, it is necessary to evaluate the detailed shock conditions from the observations of naturally-shocked planetary materials, and to compare them with the results on the planetary materials experienced a wide range of known shock conditions. Several metastable phases, that have not been known before, have recently been identified in shocked meteorites. They suggest that the shock state is often not in equilibrium and that it is more complicated process than ever thought. Experimental techniques including laser-driven shock compression and x-ray free electron laser diagnostics have been progressed to successfully simulate a wide range of shock conditions. The recent results indicate that shocked grains are fractured and rotated at relatively low pressures, and that they are subsequently transformed into denser phases or melts, or their mixtures at pressures of a few 100s GPa. Understanding of such shock dynamics requires another prospect, which is qualitatively different from the static high pressure and high temperature consensus. Therefore, it is timely to have an international symposium on dynamics of planetary materials.

4:00 PM - 4:15 PM

*Yuhei Umeda1, Norimasa Ozaki1, Toshimori Sekine2, Bruno Albertazzi3, Alessandra Benuzzi-Mounaix3, Riccardo Bolis3, Marco Guaruaglini3, Kento Katagiri1, Kodama Ryosuke1, Michel Koeing3, Kohei Miyanishi4, Shintaro Morioka1, Toyohito Nishikawa1, Syugo Ohi5, Alessandra Ravasio3, Yoichi Sakawa4, Takayoshi Sano4, Tomoko Sato6 (1.Graduate School of Engineering, Osaka Univ., 2.Center for High Pressure Science & Technology Advanced Research, 3.Ecole Polytechnique, 4.Institute of Laser Engineering, Osaka University, 5.Shiga Univ., 6.Graduate School of Science, Hiroshima University)

4:30 PM - 4:45 PM

*Kohei Miyanishi1, Norimasa Ozaki2, Satoshi Ohmura3, Marion Harmand4, Andy Krygier5, Toyohito Nishikawa2, Yuhei Umeda2, Shigemori Keisuke1, Youichi Sakawa1, Takayoshi Sano1, Ryosuke Kodama1,2 (1.Institute for Laser Engineering, Osaka University, 2.Graduate school of engineering, Osaka University, 3.Faculty of Engineering, Hiroshima Institute of Technology, 4.IMPMC, Sorbonne Université, 5.LLNL)




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