| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2010-10-06 |
| タイトル |
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タイトル |
バルチック盾状地のカーボナタイトのSr, Nd, C, O同位体比 |
| タイトル |
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タイトル |
Strontium, neodymium, carbon and oxygen isotopic compositions of carbonatites from the Baltic shield |
| 言語 |
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|
言語 |
jpn |
| 資源タイプ |
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|
資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
departmental bulletin paper |
| 著者 |
森清, 寿郎
加々美, 寛雄
黒田, 吉益
山田, 哲碓
山口, 佳昭
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| 出版者 |
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出版者 |
信州大学理学部 |
| 引用 |
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内容記述 |
信州大学理学部紀要 27(1): 23-35(1992) |
| 書誌情報 |
信州大学理学部紀要
巻 27,
号 1,
p. 23-35,
発行日 1992-10-30
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| 抄録 |
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内容記述 |
Sr, Nd, C and O isotopic compositions of carbonatites from the Sokli, Alno and Fen carbonatite complexes in the Baltic shield are reported. δ13CPDB and δ1x OSMOW values of the carbonates range from -5.8 to -3.1‰ and from 6.9 to 8.1‰, respectively. On the δ13C versus δ1x O diagram, these carbonatites are plotted slightly above or within the inferred mantle field indicating that the samples studied have not suffered surface alteration. Initial Sr and Nd isotopic compositions of each carbonatite sample were calculated using measured Sr and Nd isotopic ratios, Rb/Sr and Sm/Nd ratios and published age data. Initial x w Sr/x v Sr ratios are in the range from 0.7030 to 0.7034; the values correspond to from -12.6 to -5.6 in the ε notation. Initial 1t 3Nd/1t t Nd ratios are in the range from 0.5120 to 0.5123. εNd values are from +2.0 to +2.9. The carbonatites are characterized by negative εSr and positive εNd values. This indicates that the carbonatites were derived from the source material depleted in the incompatible elements such as Rb and light REE. εSr and εNd values of the carbonatites are compared with those of modern ocean-island basalts. The carbonatites are plotted between the field of St. Helena island and that of Walvis ridge on the eSr versus eNd diagram. The present isotopic data are consistent with the current view that carbonatites are similar in Sr and Nd isotopic characteristics to the alkali basalts from some ocean islands. |
| 資源タイプ（コンテンツの種類） |
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| ISSN |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
0583-063X |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00697923 |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
Science27-01-04.pdf (587.3 kB)
