International Session (Oral)

Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT06] Early Earth - from accumulation to formation -

Mon. May 25, 2015 9:00 AM - 10:45 AM 303 (3F)

Convener:*Tatsuya Sakamaki(Department of Earth Science, Tohoku University), Akio Suzuki(Department of Earth and Planetary Materials Science, Faculty of Science, Tohoku University), Seiji Kamada(Graduate school of Science, Tohoku University), Bjorn Mysen(Geophysical Laboratory, Carnegie Inst. Washington), Chair:Bjorn Mysen(Geophysical Laboratory, Carnegie Inst. Washington)

Prof. Eiji Ohtani is among the earliest leaders of deep earth mineralogy, geophysics and geochemistry, and remains so to this day. Central themes of his career, and the focus of this session, are experimental study of high temperature/pressure mineralogy, geophysics and geochemistry, of terrestrial and extraterrestrial materials (meteorites), which he deploys to model formation and evolution of the interior of the Earth and terrestrial planets. These include partial melting of deep silicate earth, element partitioning, role of hydrous circulation of water and hydrogen in the early deep Earth, and core/mantle equilibria together with equation-of-state of silicate mantle and metal core materials.

This session aims to bring together high-pressure/-temperature experiment on physics and chemistry of deep Earth materials, natural observation, and theoretical modeling within the principal subject areas of "Early Earth" research emphasizing;

(1) Shock events: discover of high pressure minerals in shocked meteorites
(2) Magma ocean: melting behavior of Earth and planetary materials and properties of melts at high pressures and temperatures
(3) Core formation: mineralogy, geochemistry, and physical properties of the core and core-mantle boundary

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9:00 AM - 9:15 AM

[SIT06-20] High-pressure polymorphs of silica in shocked meteorites and their implications

*Masaaki MIYAHARA¹ (1.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University)

9:15 AM - 9:30 AM

[SIT06-21] Liquidus phase relations in MgO-FeO-SiO2 system at high pressure: Implications for the solidification of magma ocean

*Akira MORISHITA¹, Ryuichi NOMURA², Kei HIROSE² (1.Department of Earth and Planetary Sciences, Graduate School of Science and Engineering, 2.Earth-life Science Institute, Tokyo Institute of Technology)

9:30 AM - 10:00 AM

★ [SIT06-22] A coordinated study on structures of liquids/glasses using synchrotron radiation in Paris-Edinburgh and the diamond cell

*Yanbin WANG¹, Tony YU¹, Vitali PRAKAPENKA¹, Clemens PRESCHER¹, Yoshio KONO², Zhicheng JING³, Peter ENG¹, Joanne STUBBS¹, Guoyin SHEN² (1.CARS, Univ. Chicago, USA, 2.HPCAT, CIW, USA, 3.Case Western Reserve Univ., USA)

10:00 AM - 10:15 AM

[SIT06-23] Acoustic wave velocity measurements of SiO_{2} - Al_{2}O_{3} glasses up to 200GPa

*Itaru OHIRA¹, Motohiko MURAKAMI¹, Eiji OHTANI¹ (1.Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University)

10:15 AM - 10:30 AM

[SIT06-24] High-pressure radiative conductivity of dense silicate glasses with implications for dark magmas

*Motohiko MURAKAMI¹ (1.Graduate School of Science, Tohoku University)

10:30 AM - 10:45 AM

[SIT06-25] Single-crystal elastic property of bridgmanite and seismic anomalies in the lower mantle

*Hiroshi FUKUI¹, Akira YONEDA², Seiji KAMADA³, Eiji OHTANI⁴, Alfred Baron⁵ (1.Graduate School of Material Science, University of Hyogo, 2.Institute for Study of the Earth's Interior, Okayama University, 3.Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 4.Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, 5.Materials Dynamics Laboratory, RIKEN)