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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. 14

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.14.72
4237c392-381a-4154-88ee-22e53558322c
名前 / ファイル ライセンス アクション
KJ00005461726.pdf KJ00005461726.pdf (670.2 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
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

WEKO 81450

ja 南, 雅代

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Minami, Masayo

× Minami, Masayo

WEKO 81451

en Minami, Masayo

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照井, 敦

× 照井, 敦

WEKO 81452

ja 照井, 敦

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Terui, Atsushi

× Terui, Atsushi

WEKO 81453

en Terui, Atsushi

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中村, 俊夫

× 中村, 俊夫

WEKO 81454

ja 中村, 俊夫

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Nakamura, Toshio

× Nakamura, Toshio

WEKO 81455

en 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 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
内容記述タイプ Abstract
内容記述
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
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.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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