JpGU-AGU Joint Meeting 2020

Presentation information

[E] Poster

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

[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)

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

★Invited Papers

*Yuhei Umeda1,2, Keiya Fukui1, Toshimori Sekine3,1, Marco Guaruaglini4, Alessandra Benuzzi-Mounaix4, Nobuki Kamimura1, Kento Katagiri1, Ryosuke Kodama1,2, Takeshi Matsuoka1, Kohei Miyanishi5, Alessandra Ravasio4, Takayoshi Sano2, Norimasa Ozaki1,2 (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)

Keywords:Laser shock compression, Planetary impact, Calcite, Shock-induced gas

No EOS models over 100 GPa, which corresponds to planetary impacts conditions, has been investigated by the experimental approach although calcite is a common mineral in chodritic meteorites and surface materials of rocky planets. In this study, calcite single crystals were shock compressed to pressures between 200 and 1000 GPa using the laser driven decaying shock method. Our temperature profiles by decaying shock experiments indicated the large difference from the theoretical model (SESAME 7331) with increasing pressure, and a melting of shocked calcite occurred between 140 and 270 GPa along the Hugoniot. The residual temperature of released calcite was estimated to be approximately 3300 K at the shock pressure of 200 GPa (at shock temperature of 6000 K).