Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1997-09-01 |
タイトル |
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タイトル |
PRELIMINARY RESULT FOR THE Nd AND Sr ISOTOPE CHARACTERISTICS OF THE ARCHAEAN GNEISSES FROM MOUNT PARDOE, NAPIER COMPLEX, EAST ANTARCTICA |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Napier Complex |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
geochronology |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
mafic gneiss |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Sm-Nd age |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Mount Pardoe |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00002846 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
論文名よみ |
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その他のタイトル |
PRELIMINARY RESULT FOR THE Nd AND Sr ISOTOPE CHARACTERISTICS OF THE ARCHAEAN GNEISSES FROM MOUNT PARDOE, NAPIER COMPLEX, EAST ANTARCTICA |
著者名よみ |
タイノショウ, ヨシアキ
カガミ, ヒロオ
ハマモト, タクジ
タカハシ, ユウヘイ
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著者名(英) |
TAINOSHO, Yoshiaki
KAGAMI, Hiroo
HAMAMOTO, Takuji
TAKAHASHI, Yuhei
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著者所属(英) |
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en |
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Department of Natural Environment, Faculty of Human Development, Kobe University |
著者所属(英) |
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en |
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Graduate School of Science and Technology, Niigata University |
著者所属(英) |
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en |
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Graduate School of Science and Technology, Niigata University |
著者所属(英) |
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en |
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Geological Survey of Japan, Hokkaido Branch |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
A Sm-Nd whole-rock isochron for five mafic gneisses at Mount Pardoe defines and age of 2595±262 Ma with an initial ^<143>Nd/^<144> Nd ratio of 0.50937±0.00024,which corresponds to an initial ε Nd value at that time +1.9. The initial ε Nd values for the felsic gneisses of the Mount Pardoe and Tonagh Island are -3.5 (-3.0∿-6.4) and -9.5 (-9.2∿-9.8), respectively which are low compared with that of CHUR (Chondritic Uniform Reservoir). This suggests that these rocks had a long crustal history before ca. 2500 Ma. The Sm-Nd ages obtained from the whole-rock samples do not represent the primary age, but correspond to the D_3-M_3 tectonothermal event. The difference in initial ε Nd value for the mafic gneisses of Mount Pardoe and Tonagh Island may reflect the different chemical compositions of the protolith. In the Rb-Sr whole-rock isochron diagram, the felsic gneisses at Mount Pardoe yield an age of 2919±233 Ma with an initial ^<87>Sr/^<86>Sr ratio of 0.70581±0.00027. Mafic gneisses at Mount Pardoe give an Rb-Sr whole-rock isochron age of 2908±216 Ma with an initial ^<87>Sr/^<86>Sr ratio of 0.70517±0.00098. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA1072335X |
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences
巻 10,
p. 92-101,
発行日 1997-09
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出版者 |
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出版者 |
National Institute of Polar Research |