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最近落下した隕石ならびに南極やまと隕石の ^<14>C濃度測定(第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14(2002)年度)報告)
https://doi.org/10.18999/sumrua.14.72
https://doi.org/10.18999/sumrua.14.724237c392-381a-4154-88ee-22e53558322c
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00005461726.pdf (670.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2010-06-02 | |||||
| タイトル | ||||||
| タイトル | 最近落下した隕石ならびに南極やまと隕石の ^<14>C濃度測定(第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14(2002)年度)報告) | |||||
| 言語 | ja | |||||
| その他のタイトル | ||||||
| その他のタイトル | Carbon-14 activities in recently fallen meteorites and Antarcitic Yamato meteorites(Proceedings of the 15^<th> Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2002) | |||||
| 言語 | en | |||||
| 著者 |
南, 雅代
× 南, 雅代× Minami, Masayo× 照井, 敦× Terui, Atsushi× 中村, 俊夫× Nakamura, Toshio |
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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 | ||||||
| 言語 | ja | |||||
| 権利情報 | 名古屋大学年代測定資料研究センター | |||||
| 権利 | ||||||
| 言語 | ja | |||||
| 権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The storage time of a meteorite on the Earth's surface, its terrestrial age, can be determined by the decay of cosmic-ray-produced radionuclides. The radionuclide ^<14>C is very useful for determining the age, especially younger age than 〜30 kyr. We have attempted measuring reliable ^<14>C terrestrial ages of Antarctic meteorites by AMS at Nagoya University. There was a problem that a fixed blank exists when carbon was extracted from meteorite, and the blank effect was large due to little ^<14>C in meteorite. So we improved the previous carbon extraction method to combust the mixture of a meteorite sample and an iron standard including nearly ^<14>C-free carbon of 0.052% in the RF furnace (LECO HF-10) and extracted ^<14>CO_2 was diluted at the same time when the meteorite was combusted. The ^<14>C activities of recently fallen meteorites of Holbrook (L6) and Mt.Tazerzait (L5) were measured by using the method. The mean value was 56.5±3.2 dpm/kg. This value is suitable, compared with the reported value of 52.7±4.3 dpm/kg for recently fallen L6 chondrites. Terrestrial ages were measured for three Antarctic Yamato meteorite samples: 0.8±0.5 kyr of Y-74190 (L6), 1.7±0.5 kyr of Y-75097 (L6), and 1.8±0.5 kyr of Y-75108 (L6). These values are younger than the data by Minami and Nakamura (2002) but agree with the value reported by Jull et al. (1984). The five samples of Y-74190, Y-75097 and Y-75108, together with Y-75102 and Y-75271, are considered the same origin (Takaoka, 1987). From the results in this study and Minami and Nakamura (2002), Y-75097 and Y-75108 could be originated from the same meteoroid, while Y-74190 could have the different origin because its terrestrial age is younger. However, the large difference is not observed in major element compositions of these meteorites. Furthermore, there is a possibility that Y-74190 existed at deeper depth of a meteoroid than the other two samples from the data of ^3He/^<21>Ne, ^<22>Ne/^<21>Ne and ^<53>Mn (Takaoka, 1987). Y-74190 could have the near terrestrial age to Y-75097 and Y-75108, by shielding or depth corrections in a meteoroid. The shielding or depth corrections are needed for ^<14>C terrestrial age determination of a meteorite sample if the meteoroid was very large or very small. By normalizing the saturated activity of ^<14>C to that of ^<10>Be in a meteorite, more correct terrestrial age for the meteorite could be obtained. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14年(2002年度)報告 Proceedings of the 15th Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2002 日時:平成15 (2003)年1月30日(木)､31日(金) 会場:名古屋大学シンポジオン Date:January 30th and 31st,2003 Place:Nagoya University Symposion Hall | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | 名古屋大学年代測定資料研究センター | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 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 | 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.14.72 | |||||
| ID登録タイプ | JaLC | |||||
| 関連情報 | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://ci.nii.ac.jp/naid/110007150865/ | |||||
| 書誌情報 |
ja : 名古屋大学加速器質量分析計業績報告書 巻 14, p. 72-82, 発行日 2003-03 |
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| フォーマット | ||||||
| 値 | application/pdf | |||||
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| 値 | publisher | |||||
