Japanese

Solid Earth Sciences (S)
Session Sub-category Science of the Earth's Interior & Techtonophysics (IT)
Session ID S-IT21
Session Title Understanding the first 150 million years of the solar system
Short Title Solar system beginnings
Date & Time Oral
Session		 AM1-AM2 Tue, 27 MAY
On-site Poster
Coretime		 PM3 Tue. 27 MAY
Main Convener Name Yuki Hibiya
Affiliation Research Center for Advanced Science and Technology, The University of Tokyo
Co-Convener 1 Name Hiroko Watanabe
Affiliation Research Center for Neutrino Science, Tohoku University
Co-Convener 2 Name William F McDonough
Affiliation Department of Earth Science and Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
Session Language E
Scope (Session Description) The first 150 million years of solar system history witnessed the formation of the rocky and gas giant planets, the Earth's Moon, and the asteroid belt. We seek to define the absolute and relative timing of these events, particularly in the inner solar system in order to explore hypotheses for their nature, origins, and timing of events at 10^6 to 10^8 time scales. For example, iron meteorites ages span from CAI formation to Mars formation, whereas chondrites ages postdate most early, small planetesimal formation and differentiation. Rocky planets likely grew rapidly by accretion of differentiated planetesimals (e.g., iron meteorite parent bodies) heated by 26Al. In contrast, chondritic parent bodies that accreted post-26Al lifetime remained undifferentiated. Mars and the Earth are equally enriched in refractory elements at 1.9 times CI chondrite, Mars is less volatile-depleted and more oxidized, and both formed Hadean crusts in the presence of surface water (cf., the Moon). We welcome contributions providing insights from physics and chemistry to the mechanisms forming and influencing these processes.
Session Format Orals and Posters session
Co-sponsorship Partner Union(s) -
JpGU Society Member(s) -
International Collaborative Society -
Organizations Other Than JpGU Society Members -