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ID 48722
本文ファイル
著者
Ito, Motoo
Uesugi, Masayuki
Naraoka, Hiroshi
Kitajima, Fumio
Mita, Hajime
Takano, Yoshinori
Karouji, Yuzuru
Yada, Toru
Ishibashi, Yukihiro
Okada, Tatsuaki
Abe, Masanao
キーワード
H, C, and N isotopes
Ion imaging with NanoSIMS
Hayabusa organic samples
抄録(英)
Since isotopic ratios of H, C, and N are sensitive indicators for determining extraterrestrial organics, we have measured these isotopes of Hayabusa category 3 organic samples of RB-QD04-0047-02, RA-QD02-0120, and RB-QD04-0001 with ion imaging using a NanoSIMS ion microprobe. All samples have H, C, and N isotopic compositions that are terrestrial within errors (approximately ±50‰ for H, approximately ±9‰ for C, and approximately ±2‰ for N). None of these samples contain micrometer-sized hot spots with anomalous H, C, and N isotopic compositions, unlike previous isotope data for extraterrestrial organic materials, i.e., insoluble organic matters (IOMs) and nano-globules in chondrites, interplanetary dust particles (IDPs), and cometary dust particles. We, therefore, cannot conclude whether these Hayabusa category 3 samples are terrestrial contaminants or extraterrestrial materials because of the H, C, and N isotopic data. A coordinated study using microanalysis techniques including Fourier transform infrared spectrometry (FT-IR), time-of-flight secondary ion mass spectrometry (ToF-SIMS), NanoSIMS ion microprobe, Raman spectroscopy, X-ray absorption near edge spectroscopy (XANES), and transmission electron microscopy/scanning transmission electron microscopy (TEM/STEM) is required to characterize Hayabusa category 3 samples in more detail for exploring their origin and nature.
内容記述
This research was supported by the JSPS Strategic Fund for Strengthening Leading-edge Research and Development to the JAMSTEC.
掲載誌名
Earth, Planets and Space
66巻
開始ページ
91
出版年月日
2014-08-13
出版者
Springer Open
ISSN
1880-5981
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
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権利情報
© 2014 Ito et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
関連情報URL
部局名
理学研究科