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 1:45 PM - 3:15 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:Toshimori Sekine(HPSTAR & Osaka University), Ai-Cheng Zhang(Nanjing 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.

2:15 PM - 2:30 PM

*Masaaki Miyahara1, Akira Yamaguchi2, Masato Saitoh1, Kanta Fukimoto1, Takeshi Sakai3, Hiroaki Ohfuji3, Naotaka Tomioka4, Yu Kodama5, Eiji Ohtani6 (1.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 2.National Institute of Polar Research, 3.Geodynamics Research Center, Ehime University, 4.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 5.Marine Works Japan, 6.Department of Earth Sciences, Graduate School of Science, Tohoku University)

2:30 PM - 2:45 PM

*Takuo Okuchi1, Narangoo Purevjav1, Norimasa Ozaki2, Takeshi Matsuoka2, Yusuke Seto3, Yoshinori Tange4, Toshinori Yabuuchi5, Naotaka Tomioka6, Toshimori Sekine7, Ryosuke Kodama2 (1.Institute for Planetary Materials, Okayama University, 2.Graduate School of Engineering, Osaka University, 3.Graduate School of Science, Kobe University, 4.Japan Synchrotron Radiation Research Institute, 5.RIKEN Harima Branch, 6.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 7.Center for High Pressure Science and Technology Advanced Research)

2:45 PM - 3:00 PM

*Hikaru Yabuta1, Hikaru Fujioka2, Tatsuhiro Sakaiya2, Tadashi Kondo2, Sohsuke Ohno3, Kosuke Kurosawa3, Toshihiko Kadono4, Keisuke Shigemori5, Yoichiro Hironaka5, Takamitsu Yamanaka6 (1.Hiroshima University, Department of Earth and Planetary Systems Science, 2.Osaka University, Department of Earth and Space Science, 3.Chiba Institute of Technology, Planetary Exploration Research Center (PERC), 4.University of Occupational and Environmental Health, 5.Osaka University, Institute of Laser Engineering, 6.Center for High Pressure Science & Technology Advanced Research, Shanghai, China)



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