Rare-Earth Abundances in Basalts and Metabasalts from the Troodos Massif,Cyprus |
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| Authors: | John D Smewing Philip J Potts |
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| Institution: | 1.Department of Earth Sciences,The Open University, Walton Hall,Milton Keynes,England |
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| Abstract: | Abundances of some rare-earth elements (REE) in twelve pillow lavas from the Upper Pillow Lavas and Axis Sequence of the Troodos Massif are reported. The samples consist of three fresh basalts and nine zeolite facies metabasalts, metamorphosed at temperatures between 0 and 200° C. All give similar light rare-earth element (LREE) depleted patterns, indicating that hydrothermal metamorphism within this temperature range does not appreciably affect these REE patterns. The LREE depletion is consistent with a petrogenetic model in which Troodos formed at a spreading axis. Variations in profile shape indicate that mantle melting beneath the axis may have taken place during a series of discrete episodes. |
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