Partitioning of trace elements between carbonate-silicate melts and mantle minerals: Experiment and petrological consequences

The partitioning of a number of trace elements (Ba, Nb, Zr, Y, REE, etc.) between orthopyroxene, garnet, and carbonate-silicate melt was experimentally studied using a belt apparatus at pressures of 3.5-4.2 GPa and temperatures of 1300-1500°C. The experimental products were investigated by electron...

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Bibliographic Details
Published in:Petrology 2006-09, Vol.14 (5), p.492-514
Main Authors: Girnis, A V, Bulatov, V K, Lahaye, Y, Brey, G P
Format: Article
Language:English
Subjects:
Mass spectrometry
Mineralogy
Trace elements
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Summary:The partitioning of a number of trace elements (Ba, Nb, Zr, Y, REE, etc.) between orthopyroxene, garnet, and carbonate-silicate melt was experimentally studied using a belt apparatus at pressures of 3.5-4.2 GPa and temperatures of 1300-1500°C. The experimental products were investigated by electron microprobe analysis and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The experimental melts varied from carbonatitic (5 wt % SiO^sub 2^) at low temperatures (1300-1350°C) to kimberlitic compositions (30 wt % SiO^sub 2^) at high temperatures (1500°C). The partition coefficients of most elements between orthopyroxene and melt (D ^sub i^ ^sup Opx/L^ ) and garnet and melt (D ^sub i^ ^sup Grt/L^ ) were almost independent of melt composition (temperature). The D ^sub i^ ^sup Opx/L^ values ranged from
ISSN:0869-5911
1556-2085
DOI:10.1134/S0869591106050055