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Mineralogy and noble gas isotopes of micrometeorites collected from Antarctic snow

https://hiroshima.repo.nii.ac.jp/records/2006785
https://hiroshima.repo.nii.ac.jp/records/2006785
85b3f6c6-93b4-440d-9593-3ac5304629a4
名前 / ファイル ライセンス アクション
EarthPlanetsSpace_67_90.pdf EarthPlanetsSpace_67_90.pdf (3.9 MB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Mineralogy and noble gas isotopes of micrometeorites collected from Antarctic snow
言語 en
作成者 Okazaki, Ryuji

× Okazaki, Ryuji

en Okazaki, Ryuji

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Noguchi, Takaaki

× Noguchi, Takaaki

en Noguchi, Takaaki

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Tsujimoto, Shin-ichi

× Tsujimoto, Shin-ichi

en Tsujimoto, Shin-ichi

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Tobimatsu, Yu

× Tobimatsu, Yu

en Tobimatsu, Yu

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Nakamura, Tomoki

× Nakamura, Tomoki

en Nakamura, Tomoki

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Ebihara, Mitsuru

× Ebihara, Mitsuru

en Ebihara, Mitsuru

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Itoh, Shoichi

× Itoh, Shoichi

en Itoh, Shoichi

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Nagahara, Hiroko

× Nagahara, Hiroko

en Nagahara, Hiroko

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Tachibana, Shogo

× Tachibana, Shogo

en Tachibana, Shogo

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Terada, Kentaro

× Terada, Kentaro

en Terada, Kentaro

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Yabuta, Hikaru

× Yabuta, Hikaru

en Yabuta, Hikaru

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 © 2015 Okazaki et al. 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.
主題
主題Scheme Other
主題 Antarctic micrometeorites
主題
主題Scheme Other
主題 Noble gas
主題
主題Scheme Other
主題 Transmission electron microscopy
主題
主題Scheme Other
主題 Atmospheric entry heating
主題
主題Scheme Other
主題 Solar energetic particles
内容記述
内容記述 We have investigated seven micrometeorites (MMs) from Antarctic snow collected in 2003 and 2010 by means of electron microscopy, X-ray diffraction, micro-Raman spectroscopy, transmission electron microscopy (TEM) observation, and noble-gas isotope analysis. Isotopic ratios of He and Ne indicate that the noble gases in these MMs are mostly of solar wind (SW). Based on the release patterns of SW 4He, which should reflect the degree of heating during atmospheric entry, the seven MMs were classified into three types including two least heated, three moderately heated, and two severely heated MMs. The heating degrees are well correlated to their mineralogical features determined by TEM observation. One of the least heated MMs is composed of phyllosilicates, whereas the other consists of anhydrous minerals within which solar flare tracks were observed. The two severely heated MMs show clear evidence of atmospheric heating such as partial melt of the uppermost surface layer in one and abundant patches of dendritic magnetite and Si-rich glass within an olivine grain in the other. It is noteworthy that a moderately heated MM composed of a single crystal of olivine has a 3He/4He ratio of 8.44 × 10−4, which is higher than the SW value of 4.64 × 10−4, but does not show a cosmogenic 21Ne signature such as 20Ne/21Ne/22Ne = 12.83/0.0284/1. The isotopic compositions of He and Ne in this sample cannot be explained by mixing of a galactic cosmic ray (GCR)-produced component and SW gases. The high 3He/4He ratio without cosmogenic 21Ne signature likely indicates the presence of a 3He-enriched component derived from solar energetic particles.
言語 en
内容記述
内容記述タイプ Other
内容記述 This work was supported by Grant-in-Aid for Scientific Research (S) (No. 22224010, PI: H. Nagahara) and partly by a Grant-in-Aid for Young Scientists (A) (No. 23684046, PI: R. Okazaki).
出版者
出版者 Springer Open
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1186/s40623-015-0261-8
関連情報
識別子タイプ DOI
関連識別子 https://doi.org/10.1186/s40623-015-0261-8
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1880-5981
開始ページ
開始ページ 90
書誌情報 Earth, Planets and Space
Earth, Planets and Space

巻 67, p. 90, 発行日 2015-06-17
旧ID 48717
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