書誌事項
- タイトル別名
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- Geochemistry and cosmochemistry of lithium. Utility of the Li isotopes as a geochemical tracer.
- リチウム ノ チキュウ ウチュウ カガク Li ドウイタイ ノ トレーサ -
- Utility of the Li isotopes as a geochemical tracer
- Li同位体のトレーサーとしての可能性と課題
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抄録
Geochemical and cosmochemical studies on lithium are reviewed and the potential of lithium isotope systematics as a geological tracer is discussed in this article.<br> Lithium, the smallest of the alkaline elements, possesses two stable isotopes, 6Li and 7Li. It also displays the following unique physicochemical characteristics: (1) an extremely high cross-section of the lithium isotope 6Li for thermal neutrons; (2) high incompatibility in the mafic silicate minerals in the magmatic processes; (3) high solubility in fluid phases; and (4) large isotopic variations in the 6Li/7Li ratio of natural samples exceeding 30‰. The content and isotopic composition of lithium in meteoritic and terrestrial materials may provide important clues <br>to understanding nucleosynthesis theories and many geological phenomena including water/rock interactions, metamorphic and magmatic processes.<br> However, the isotopic behavior of lithium in geologic processes is still not well understood, since only a few reliable isotopic measurements of lithium are available for natural samples due essentially to analytical difficulties; derived from the extremely large mass difference between the two isotopes and no internally-derived correction for the mass fractionation in mass spectrometry. In order to apply lithium isotope systematics for understanding geochemical and water-related processes in the Earth and other planets, the development of a high precision technique for lithium isotope analysis is urgently required so as to accumulate the much needed fundamental data set of natural samples.
収録刊行物
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- 岩鉱
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岩鉱 88 (9), 415-431, 1993
一般社団法人 日本鉱物科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681191631872
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- NII論文ID
- 130003884783
- 40004731609
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- NII書誌ID
- AN10047992
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- COI
- 1:CAS:528:DyaK2cXlvVKqtQ%3D%3D
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- ISSN
- 18813275
- 09149783
- http://id.crossref.org/issn/09149783
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- NDL書誌ID
- 3847776
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可