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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 20

石灰質砂岩の炭素14 を指標とする風化評価 : コンクリート風化のナチュラルアナログ研究として

https://doi.org/10.18999/sumrua.20.71
https://doi.org/10.18999/sumrua.20.71
105a207a-58b6-48a3-8e6e-e726a5f1e366
名前 / ファイル ライセンス アクション
minami2008.pdf minami2008.pdf (14.0 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2011-04-28
タイトル
タイトル 石灰質砂岩の炭素14 を指標とする風化評価 : コンクリート風化のナチュラルアナログ研究として
言語 ja
その他のタイトル
その他のタイトル A weathering assessment of calcareous sandstone using radiocarbon : A natural analogue study for weathering of concrete construction
言語 en
著者 南, 雅代

× 南, 雅代

WEKO 82796

ja 南, 雅代

Search repository
池田, 晃子

× 池田, 晃子

WEKO 82797

ja 池田, 晃子

Search repository
吉田, 英一

× 吉田, 英一

WEKO 82798

ja 吉田, 英一

Search repository
田中, 剛

× 田中, 剛

WEKO 82799

ja 田中, 剛

Search repository
Minami, Masayo

× Minami, Masayo

WEKO 82800

en Minami, Masayo

Search repository
Ikeda, Akiko

× Ikeda, Akiko

WEKO 82801

en Ikeda, Akiko

Search repository
Yoshida, Hidekazu

× Yoshida, Hidekazu

WEKO 82802

en Yoshida, Hidekazu

Search repository
Tanaka, Tsuyoshi

× Tanaka, Tsuyoshi

WEKO 82803

en Tanaka, Tsuyoshi

Search repository
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
抄録
内容記述 Weathering rinds in two Triassic calcareous sandstones collected from Tatehama and Namiita at the Sanriku seashore, northeast Japan, were investigated to clarify the process of elemental migration, especially modem radiocarbon (^<14>C) accumulation caused by atmospheric CO2 during chemical weathering. Major element and carbon concentrations together with ^<14>C abundances were measured across weathering rinds of the sandstones. Specific depletion of calcium and carbon concentrations, and enrichment of iron concentration were observed in the weathering rinds for the both calcareous sandstones. The result indicates that calcareous phase in weathering rinds has been leached, and that ferrous ion has been accumulated in the rims by oxidization after migration under reducing subsurface during chemical weathering. It is noted that the Tatehama and Namiita sandstones have different behavior of migration for some elements such as calcium and magnesium in the extreme rims: a little enrichment and gradual depletion for the Tatehama and Namiita samplesラrespectively. The difference might be due to seawater-rock interaction because the Tatehama sample occurs near seashore lapped by wave and the Namiita sample does not. On the other hand, the both sandstones show the same ^<14>C accumulation behavior in weathering rinds. ^<14>C was not detected in the fresh fractions of the calcareous sandstones, due to ^<14>C-free (dead) carbon contained in a fresh Triassic limestone, while modem ^<14>C was detected in the weathering rinds. The modem ^<14>C could be originated from atmospheric CO2. From this study, ^<14>C is found to be a sensitive and general index of weathering of calcareous stones. Therefore, ^<14>C could be used as a sensitive index of concrete weathering.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 第21回名古屋大学年代測定総合研究センターシンポジウム平成20(2008)年度報告
言語 ja
内容記述タイプ Other
出版者
言語 ja
出版者 名古屋大学年代測定資料研究センター
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/sumrua.20.71
ID登録タイプ JaLC
書誌情報 ja : 名古屋大学加速器質量分析計業績報告書

巻 20, p. 71-80, 発行日 2009-03
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