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Isotopic evidence for the origin of boninites and related rocks drilled in the Izu-Bonin (Ogasawara) Forearc, Leg 125

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1992

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Twenty six samples representing the wide range of lithologies drilled during Leg 125 at Sites 782 and 786 on the Izu-Bonin outer-arc high have been analyzed for Sr, Md and Pb isotopes. In all isotopic projections, the samples form consistent groupings: the tholeiites from Site 782 and Hole 786A plot closest to PMM, the boninites and related rocks from Sites 786B plot closest to PVS, and the boninite lavas from Hole 786A and late boninitic dikes from Hole 786B occupy an intermediate position. Isotope-trace element covariations indicate that these isotopic variations can be explained by a three-component mixing model. -from Authors

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https://dspace-test.anu.edu.au/handle/1885/733740987

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DevOps Pure Testing

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