[P-CG23] Shock responses of planetary materials elucidated from meteorites and laboratory experiments

convener:Takuo Okuchi(Institute for Planetary Materials, Okayama University), Toshimori Sekine(Center for High Pressure Science and Technology Advanced Research), Naotaka Tomioka(Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)

Impact phenomena have been recognized to play essential roles in the processes of planetary evolution. Recent progresses in nanoscale analysis of meteorites, asteroid explorations, as well as laboratory experiments for simulating shock dynamics on planetary materials are collaboratively revealing complex effects of shock-induced processes in planetary evolution. Recently, several new metastable high-pressure phases have been identified in strongly shocked meteorites. Their occurrences indicate that the shock-induced physical states are far from thermodynamic equilibrium and contain very complicated processes. On the other hand, laboratory experiments including laser-driven shock techniques have recently been making remarkable progresses. They successfully simulate a variety of fast non-equilibrium processes at transient high-pressure conditions reaching tens to a few hundreds of gigapascals, that uniquely affect the physical and chemical properties of planetary materials upon impacts. Here we discuss how planetary materials are compressed, fractured, transformed, melted, and quenched during impact events by referring these recent studies. We welcome presentations from interdisciplinary research fields related to shock responses of planetary materials.

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[PCG23-P01] Nanofragmentation as potential marks of multiple low-velocity impacts in carbonaceous chondrites

*Balazs Bradak¹, Yusuke Seto², Akos Kereszturi^3,4, Martin Chadima⁵, Masayuki Hyodo⁶ (1.Department of Physics, University of Burgos, Burgos, Spain, 2.Department of Planetology, Kobe University, Kobe, Japan, 3.Konkoly Thege Miklos Astronomical Institute, Research Centre for Astronomy and Earth Sciences, MTA Centre for Excellence, Budapest, Hungary, 4.European Astrobiology Institute, virtual institute hosted by the European Science Foundation, Strasbourg, France, 5.AGICO Inc., Brno, Czech Republic, , 6.Research Center for Inland Seas, Kobe University, Kobe, Japan)

[PCG23-P02] In-situ observations of shock-induced dehydration of goethite

*Tsubasa Tobase¹, Huijeong Hwang², Yongjae Lee², Takuo Okuchi³, Toshimori Sekine^1,4 (1.Center for High Pressure Science and Technology Advanced Research, 2.Department of Earth System Sciences, Yonsei University, 3.Institute of Planetary Materials, Okayama University, 4.Graduate School of Engineering, Osaka University)

[PCG23-P03] Gekko XII experiment on magnetized collisionless shock

*Shuichi Matsukiyo¹, Takumi Higuchi², Hiroo Murakami², Youichi Sakawa³, Taichi Morita¹, Kentaro Tomita¹, Ryo Yamazaki⁴, Takayoshi Sano³, Yasuhiro Kuramitsu⁵, Shuta J Tanaka⁴, Natsuki Ishizaka⁴, Shin Kakuchi⁴, Shuto Sei⁴, Kei Sugiyama⁴, Masato Ota³, Shunsuke Egashira³, Tomohiro Izumi³, Kentaro Sakai⁵, Takumi Minami⁵, Hiroki Nishioka², Mariko Takagi², Takuto Kojima², Kento Aihara⁴, Shota Kanbayashi⁴, Sara Tomita⁴, Yoshiharu Nakagawa³, Takahiro Nishimoto⁵, Masaki Takano⁵ (1.Faculty of Engineering Sciences, Kyushu University, 2.Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 3.Institute of Laser Engineering, Osaka University, 4.Department of Physics and Mathematics, Aoyama Gakuin University, 5.Graduate School of Engineering, Osaka University)

[PCG23-P04] Laser-driven shock compression experiments of synthetic wadsleyite and ringwoodite crystals

*Takuo Okuchi¹, Narangoo Purevjav¹, Norimasa Ozaki², Takayoshi Sano³, Yuhei Umeda², Ryosuke Kodama^2,3 (1.Institute for Planetary Materials, Okayama University, 2.Graduate School of Engineering, Osaka University, 3.Institute of Laser Engineering, Osaka University)

[PCG23-P05] In situ observation of phase transition behavior of shocked baddeleyite

*Sota Takagi^1,2, Atsushi Kyono¹, Shunsuke Nozawa², Nobuaki Kawai³, Koji Inukai⁴, Ryo Fukaya², Nobumasa Funamori², Shin-ichi Adachi², Kouhei Ichiyanagi² (1.University of Tsukuba, 2.KEK, 3.Kumamoto University, 4.Noritake Co., Limited)

[PCG23-P06] Dynamic behavior of calcite under planetary impact condition

★Invited Papers

*Yuhei Umeda^1,2, Keiya Fukui¹, Toshimori Sekine^3,1, Marco Guaruaglini⁴, Alessandra Benuzzi-Mounaix⁴, Nobuki Kamimura¹, Kento Katagiri¹, Ryosuke Kodama^1,2, Takeshi Matsuoka¹, Kohei Miyanishi⁵, Alessandra Ravasio⁴, Takayoshi Sano², Norimasa Ozaki^1,2 (1.Graduate School of Engineering, Osaka University, 2.Institute of Laser Engineering, Osaka University, 3.Center for High Pressure Science & Technology Advanced Research, 4.Ecole Polytechnique, 5.Riken, Spring-8, SACLA)