JpGU-AGU Joint Meeting 2020

Session information

Print

[E] Oral

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)

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.

[PCG23-01] Shock heating origin of anomalous achondrite NWA 6704 from infrared spectroscopy and modal mineralogy

*Matthew Izawa1, Sean Yokoyama2, Shigeru Yamashita1, Takuo Okuchi1, Takuya Moriguti1, Andrew P Jephcoat1, Vishnu Reddy3, Allison M McGraw3, Lucille Le Corre4, Edward A Cloutis5 (1.Institute for Planetary Materials, Okayama University, 827 Yamada, Misasa, Tottori 682-0193, Japan, 2.University of Toronto, 27 King's College Cir, Toronto, ON M5S, Canada , 3.Lunar and Planetary Laboratory, University of Arizona, 1629 E University Blvd Tucson AZ 85721-0092 USA, 4.Planetary Science Institute, 1700 East Fort Lowell, Suite 106, Tucson, AZ, USA, 5.Center for Terrestrial and Planetary Exploration, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 Canada )

[PCG23-02] A new Mg2SiO4 polymorph “poirierite” in shocked meteorites and its possible high-pressure synthesis conditions

*Naotaka Tomioka1, Takuo Okuchi2, Luca Bindi3, Masaaki Miyahara4, Toshiaki Iitaka5, Zhi Li6, Xiande Xie7, Narangoo Purevjav2,8, Kiyoshi Fujino9, Tetsuo Irifune9, Riho Tani4,1, Yu Kodama10 (1.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 2.Institute for Planetary Materials, Okayama University, 3.Università degli Studi di Firenze, 4.Hiroshima University, 5.RIKEN, 6.Nanjing University of Science and Technology, 7.Guangzhou Institute of Geochemistry, 8.Bayerisches Geoinstitut, University of Bayreuth, 9.Geodynamics Research Center, Ehime University, 10.Marine Works Japan Ltd)

[PCG23-05] Shock and recovery experiments of petrologic type 3 ordinary chondrite

*Masaaki Miyahara1, Junnosuke Edanaga1, Akira Yamaguchi2, Takamichi Kobayashi3, Toshimori Sekine4,5 (1.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 2.National Institute of Polar Research, 3.National Institute for Materials Science, 4.Center for High-Pressure Science and Technology Advanced Research, 5.Graduate School of Engineering, Osaka University)

[PCG23-06] An overlooked heat source in impact events and its effect on the degree of devolatilization of natural calcite carbonates

★Invited Papers

*Kosuke Kurosawa1, Hidenori Genda2, Shintaro Azuma3, Keishi Okazaki4 (1.Planetary Exploration Research Center, Chiba Institute of Technology, 2.Earth-Life Science Institute, Tokyo Institute of Technology, 3.Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology , 4.Kochi Institute for Core Sample Research, JAMSTEC)