| Seminar: | AICS/CPS Seminar |
| date: | 2016 October 20 (Thu) 13:30-15:00 |
| room: | CPS Conference Room |
| speaker: | Shun-ichiro Karato (Professor,Yale University) |
| title: | Composition and Origin of the Moon II |
| abstract: |
Giant impact model of the Moon has been a paradigm in the community for~30 years. However, there are a few new results on the composition of the Moon that challenge this paradigm. They include the recent observations on the not-so-dry composition and the similarity in the isotopic compositions of some refractory elements. The simple intuition would suggest that the Moon formed by a giant impact would be “dry”, and most of numerical models of Moon formation by a giant impact predict that a large fraction of the Moon would be from the impactor and hence the isotopic composition of the Moon would be different from that of Earth. Therefore a conventional giant impact model would be inconsistent with these geochemical observations. I will discuss possible models to solve these puzzles based largely on the knowledge of material properties such as the phase diagram and the equation of state. |
| keywords: | the Moon, water, giant impact, isotope, equation of state |
| organizer: | Junichiro Makino |