JpGU-AGU Joint Meeting 2017

講演情報

[JJ] ポスター発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS10] [JJ] 太陽系における惑星物質の形成と進化

2017年5月22日(月) 13:45 〜 15:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:臼井 寛裕(東京工業大学地球生命研究所)、宮原 正明(広島大学理学研究科地球惑星システム学専攻)、山口 亮(国立極地研究所)、癸生川 陽子(横浜国立大学 大学院工学研究院 機能の創生部門)

[PPS10-P08] 放射光CTを用いた、隕石の総合観察システムの構築

*上椙 真之1竹内 晃久1上杉 健太朗1 (1.公益財団法人高輝度光科学研究センター)

キーワード:放射光CT、XRD-CT、隕石

Synchrotron radiation computed tomography (SR-CT) enables us to observe the internal structure of extraterrestrial materials with spatial resolution around 100nm three-dimensionally, without breaking them. In previous studies, however, we can not investigate the mineral phases and chemical composition of internal materials of the samples. In addition, considerable errors are occurred if we observed samples larger than the field of view of the CT instruments.

Recently, several methods of the combination of x-ray diffraction (XRD) and CT were developed in the material sciences of engineering fields [e.g. 1-2], and performed precise observation of polycrystalline metals or alloys. We can determine the mineral phases of the sample uniquely, orientation of the crystals inside them and analyze their chemical composition by linear attenuation coefficient [3].

In this paper, we report a new instrument for the total analysis of rocky material which includes XRD, SR-CT, and local tomography which images a region of interest of a sample by zooming up it. We also developed softwares for the integrated analysis of data obtained by the system. The software relates the images and data obtained by those different methods with simple operation. Using this system, we can search and investigate certain materials or minerals included in the sample, such as carbon phases. We also introduce future developments and application for analysis of materials obtained by future sample return missions.

References: [1] Toda et al., (2016) Acta Materialia 107 310-324. [2] West et al., (2009) Scripta Materialia 61 875–878. [3] Uesugi et al., (2013) Geochimica et Cosmochimica Acta 116, 17–32.