Olivine/liquid partition coefficients for most trace elements relevant in petrogenetic studies are provided for a hydrous basanite melt equilibrated at 1.4 GPa and 1055 °C. The partitioning results determined by a combination of EMP and SIMS analyses are discussed in terms of available crystal-chemical mechanisms and crystal-structure control. The critical evaluation of this data set and of those reported in the literature, in the frame of the present lattice-strain model, provides useful suggestions for future studies designed to clarify incorporation mechanisms and site preference in olivine. A further useful suggestion is that the measured Ol/LD values for Li, Mg and Sc allow a straightforward but reliable estimate of the D0 for 1+, 2+ and 3+ cations, respectively. The assessment of D0 for VIHFSE4+ is probably biased by their partitioning between the T and M sites. Anyway, it can be reasonably assumed to be close to Ol/LDZr.

Trace-element partitioning in olivine: modelling of a complete data set from a synthetic hydrous basanite melt / A. Zanetti, M. Tiepolo, R. Oberti, R. Vannucci. - In: LITHOS. - ISSN 0024-4937. - 75:1-2(2004), pp. 39-54.

Trace-element partitioning in olivine: modelling of a complete data set from a synthetic hydrous basanite melt

M. Tiepolo
Secondo
;
2004

Abstract

Olivine/liquid partition coefficients for most trace elements relevant in petrogenetic studies are provided for a hydrous basanite melt equilibrated at 1.4 GPa and 1055 °C. The partitioning results determined by a combination of EMP and SIMS analyses are discussed in terms of available crystal-chemical mechanisms and crystal-structure control. The critical evaluation of this data set and of those reported in the literature, in the frame of the present lattice-strain model, provides useful suggestions for future studies designed to clarify incorporation mechanisms and site preference in olivine. A further useful suggestion is that the measured Ol/LD values for Li, Mg and Sc allow a straightforward but reliable estimate of the D0 for 1+, 2+ and 3+ cations, respectively. The assessment of D0 for VIHFSE4+ is probably biased by their partitioning between the T and M sites. Anyway, it can be reasonably assumed to be close to Ol/LDZr.
partition coefficients; olivine; hydrous basanite; trace elements; SIMS analysis
Settore GEO/08 - Geochimica e Vulcanologia
2004
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/319230
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