Item type |
紀要論文 / Departmental Bulletin Paper(1) |
公開日 |
2008-05-02 |
タイトル |
|
|
タイトル |
^<40>Ar-^<39>Ar Dating : Investigation of some Technical Problems and its Application to the Deccan Trap Rocks and a Unique Meteorite from Antarctica |
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 |
著者 |
Kaneoka, Ichiro
Iwata, Naoyoshi
Takigami, Yutaka
|
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
In order to get more reliable ages and extend the application of ^<40>Ar-^<39>Ar dating for terrestrial and exterrestrial samples, some technical problems such as the examination of the efficiency of Cd-shielding to reduce the interference thermal neutron flux and the laser heating method were investigated. It has been reconfirmed that Cd-shielding is effective to reduce the interference ^<40>Ar produced by thermal neutron from potassium. Further the laser heating method has been successfully developed in our laboratory and give reasonable ages for some age standard and Deccan Trap samples. Application of ^<40>Ar-^<39>Ar dating method gives ages for Deccan Trap samples which range from less than 60 Ma to about 70 Ma. The clast in a unique meteorite from Antarctica gives a in ^<40>Ar-^<39>Ar age of about 490 Ma which corresponds to a degassing event and concordant with that of the host meteorite. |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
^<40>Ar-^<39>Ar age |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Cd-shielding |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Laser heating |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Deccan Traps |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Meteorite |
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Antarctica |
書誌情報 |
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy
巻 45,
号 1,
p. 47-51,
発行日 1997-03-28
|
ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
00408808 |
書誌レコードID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00836167 |
フォーマット |
|
|
内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
出版者 |
|
|
出版者 |
Tohoku University |
資源タイプ |
|
|
内容記述タイプ |
Other |
|
内容記述 |
紀要類(bulletin) |
登録日 |
|
|
日付 |
2008-05-02 |
|
日付タイプ |
Created |
公開日(投稿完了日) |
|
|
日付 |
2008-05-02 |
|
日付タイプ |
Created |
発行日 |
|
|
日付 |
1997-03-28 |
|
日付タイプ |
Created |
フォーマット |
|
|
内容記述タイプ |
Other |
|
内容記述 |
455654 bytes |
公開範囲 |
|
|
値 |
学外 |
更新日 |
|
|
日付 |
2010-01-27 |
|
日付タイプ |
Created |