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40Ar-39Ar Ages of L and LL Chondrites from Allan Hills, Antarctica: ALHA77015,77214 AND 77304
https://nipr.repo.nii.ac.jp/records/1098
https://nipr.repo.nii.ac.jp/records/109874b5e471-cdaf-43e3-96ef-f1d34f5f3796
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000011624.pdf (2.1 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1980-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | 40Ar-39Ar Ages of L and LL Chondrites from Allan Hills, Antarctica: ALHA77015,77214 AND 77304 | |||||
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 | ^<40>(Ar)-^<39>(Ar) ages have been determined for three chondrites (ALHA77015,77214,77304) from Allan Hills, Antarctica. Although younger ages have been observed at lower and higher temperatures for ALHA77015 (L3), the intermediate plateau-like age indicates a value of 4514±48 (1σ) Ma, though the plateau range is relatively narrow about 27% of the total ^<39>(Ar). ALHA77304 (LL3) shows a typical plateau age of 4503±52 Ma at higher temperatures, covering about 46% of the total ^<39>(Ar). Seriously weathered ALHA77214 (L or LL) exhibits a typical stair-case age pattern, increasing from about 1600 Ma up to about 4450 Ma. When coupled with reported data on other chondrites, there may be a rough correlation between the ^<40>(Ar)-^<39>(Ar) age and the degree of metamorphism defined from their petrologic type for unshocked L chondrites. However, such a trend is not clear for H and LL chondrites and a more systematic survey is required to settle the problem. | |||||
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 17, p. 177-188, 発行日 1980-12 |