Japan Geoscience Union Meeting 2016

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Symbol M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI22] Development of computational sciences on planetary formation, evolution and surface environment

Tue. May 24, 2016 10:45 AM - 12:15 PM A07 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Junichiro Makino(RIKEN AICS), Yoshi-Yuki Hayashi(Department of Planetology/CPS, Graduate School of Science, Kobe University), Shigeru Ida(Department of Earth and Planetary Science, Graduate School of Science and Technology, Tokyo Institute of Technology), Yuri Aikawa(Center for Computational Sciences, University of Tsukuba), Masaki Ogawa(Division of General Systems Studies, Graduate School of Arts and Sciences, University of Tokyo), Masayuki Umemura(Center for Computational Sciences,　University of Tsukuba), Chair:Masaki Ogawa(Division of General Systems Studies, Graduate School of Arts and Sciences, University of Tokyo)

10:45 AM - 11:00 AM

[MGI22-06] New developments in planetary formation theory of solar system derived from ABEL model

*Shigenori Maruyama1, Toshikazu Ebisuzaki2 (1.Earth-Life Science Institute, Tokyo Institute of Technology, 2.RIKEN)

Keywords:Planetary formation theory, ABEL model

The Earth was formed as dry rocky planet without atmosphere nor ocean at 45.6Ga. Atmospheric and oceanic components were added at 4.4Ga by late heavy bombardment. This 2 step formation model of the Earth is named ABEL model (Advent of Bio-Elements Landing Model). The origin of solid Earth is enstatite chondrite which has been already clearly indicated by analysis of oxygen isotopic composition and other isotopic data. At the same time, the origin of water on the Earth is carbonaceous chondrites which is backed by hydrogen isotopic ratio. These 2 facts have been thought to be contradictory, but ABEL model is able to explain them perfectly. Also this model explains this two-step formation was the precursor of the reaction as metabolism.
Here, we give a comprehensive views for the research of planetary formation theory of solar system based on ABEL model for followings. (1) Moon formation theory (Giant Impact model), (2) Chemical zoning of asteroid belt with observational facts (they does not support the Grand Tack model that suggests random distribution of chemistry), (3) Chronology research based on meteorites, (4) H2 gas escaped during first 3 hundred million years after the formation of protoplanetary disk.
Based on above information, we give new developments in planetary formation theory of solar system.