Isotopic composition of strontium in three basalt-andesite centers along the Lesser Antilles arc
✍ Scribed by Carl E. Hedge; John F. Lewis
- Book ID
- 104745847
- Publisher
- Springer
- Year
- 1971
- Tongue
- English
- Weight
- 559 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0010-7999
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✦ Synopsis
SrsT/SrSe ratios have been determined for lavas and py lastie rocks from three basalt-andesite centers along the Lesser Antilles arc--Mr. Misery on the island of St. Kitts, Soufriere on the island of St. Vincent, and Carriacou, an island of The Grenadines. The average SrsT/Sr se content of these rocks is 0.7038 for Mr. Misery, 0.7041 for Soufriere, and 0.7053 for Carriacou. All the SrST/SrS6 values from each center are the same within analytical uncertainty (4-0.0002). The constancy of strontium isotopic data within each center supports the hypothesis that basalts and andesites for each specific center investigated are generated from the same source--in agreement with petrographic and major-and minor-dement data. Strontium isotopic compositions and elemental concentrations, particularly of strontium and nickel, indicate that this source was mantle peridotite and that the relationship between the respective basalts and andesites is probably fractional crystallization.