64113106.pdf459.74 kB
Other TitleSegregation mechanism of metal and silicate liquids on the microgravity asteroids
Author(jpn)荒井, 朋子; 武田, 弘; 村上, 敬司
Author(eng)Arai, Tomoko; Takeda, Hiroshi; Murakami, Keiji
Author Affiliation(jpn)国立極地研究所; 千葉工業大学; 宇宙航空研究開発機構宇宙環境利用センター
Author Affiliation(eng)National Institute of Polar Research; Chiba Institute of Technology; Space Environment Utilization Center, Japan Aerospace Exploration Agency (JAXA)
Issue Date2006-03
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
Publication titleSpace Utilization Research: Proceedings of Space Utilization Symposium
Publication date2006-03
AbstractIAB irons are one of a few types of iron meteorites that contain silicate inclusions. Caddo County IAB iron meteorite includes silicate inclusions rich in Na-rich plagioclase and diopside, which is classified as andesite. The andestic material can be an early partial melt product of chondritic materials. This indicates inhomogeneous segregation of partial melt of andesitic silicate and Fe-Ni-S metal from chondritic source occured even in a small planetesimal. This further implies that building block of terrestrial planets are not only chondritic materials, but also such inhomogeneously segregated partial melts from chondritic sources. Thus, the physical mechanism of metal segregation under microgravity, low pressure, and low oxygen fugacity needs to be understood, in order to decipher the abundances and partitioning behaviors of chemical compositions of the terrestrial planets. We plan to experimentally verify our model for the segregation mechanism of metal and silicate liquids on the microgravity planetismal.
DescriptionOriginal contains color illustrations
Meeting Information: The Twenty-second Space Utilization Symposium (January 17-19, 2006: Science Council of Japan, Roppongi, Tokyo, Japan)
Meeting sponsors: The Science Council of Japan, The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
形態: カラー図版あり
会議情報: 第22回宇宙利用シンポジウム(2006年1月17日-19日, 日本学術会議6階会議室 六本木、東京)
共催: 日本学術会議
KeywordsMicrogravity, Asteroids, Planetismals, Origin of terrestrial planets, Core formation
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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