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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 |
---|---|---|
KJ00000012198.pdf (2.2 MB)
|
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 |
|||||
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 |