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Investigation of the weathering effect on the 40Ar-39Ar ages of Antarctic meteorites
https://nipr.repo.nii.ac.jp/records/1565
https://nipr.repo.nii.ac.jp/records/156541814871-06d5-457c-83fc-7d0f6af219e8
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||
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公開日 | 1983-12-01 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Investigation of the weathering effect on the 40Ar-39Ar ages of Antarctic meteorites | |||||||
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 | departmental bulletin paper | |||||||
ページ属性 | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | P(論文) | |||||||
著者名(英) |
Kaneoka, Ichiro
× Kaneoka, Ichiro
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著者所属(英) | ||||||||
en | ||||||||
Geophysical Institute, Faculty of Science, University of Tokyo | ||||||||
抄録(英) | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | In order to examine the weathering effect on ^<40>(Ar)-^<39>(Ar) ages of Antarctic meteorites, the ^<40>(Ar)-^<39>(Ar) age patterns were compared for the outer and inner portions of two Antarctic meteorites (ALH-761,ALH-77288). The results indicate that the oxidized outer portions show anomalously old ^<40>(Ar)-^<39>(Ar) ages which exceed 4600Ma in the intermediate temperature fractions of around 800-1000℃. These old ^<40>(Ar)-^<39>(Ar) ages are accompanied by the increase of ^<36>(Ar), which is regarded to be mostly of atmospheric ^<36>(Ar). This might be explained by the incorporation of atmospheric Ar in hematite which was produced from goethite during neutron irradiation. The inner relatively fresh portions show the following plateau ages : ALH-761,64,4487±50Ma; ALH-77288,63,4497±40Ma. | |||||||
雑誌書誌ID | ||||||||
収録物識別子タイプ | NCID | |||||||
収録物識別子 | AA00733561 | |||||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 30, p. 259-274, 発行日 1983-12 |