Relationship of strontium isotope ratio and chemical composition of micro inclusions in fibrous diamonds: Implication for isotopically different components of the upper mantle.
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- Akagi Tasuku
- Faculty of Agriculture, Tokyo University of Agriculture and Technology
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Strontium isotope ratios in whole fibrous diamonds from Zaire do not correlate with Rb/Sr ratios, but with La/Ba and La/Nd ratios. Diamonds with lower La/Ba and higher La/Nd gave higher 87Sr/86Sr. Leaching experiments on crushed diamonds gave lower La/Ba and higher La/Nd for water leachate and higher La/Ba and lower La/Nd for acid leachate, and more importantly, the former has higher 87Sr/86Sr ratios than the latter, which is in accord with the experiments of whole diamonds. The two leachates are considered to be from water-rich fluid and carbonates, respectively. It is likely that the diamonds have formed in the environment where water-rich fluid and carbonate-rich fluid or melt were mixing and that the mixing may have triggered kimberlitic magmatism.
収録刊行物
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- GEOCHEMICAL JOURNAL
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GEOCHEMICAL JOURNAL 33 (2), 101-107, 1999
一般社団法人日本地球化学会
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詳細情報
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- CRID
- 1390282679528013824
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- NII論文ID
- 130003904620
- 10008803689
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- NII書誌ID
- AA00654975
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- ISSN
- 18805973
- 00167002
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- NDL書誌ID
- 4805984
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- 本文言語コード
- en
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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