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Trace element partitioning between clinopyroxene, magnetite, ilmenite and ferrobasaltic to dacitic magmas: an experimental study on the role of oxygen fugacity and melt composition

Shepherd, Kat ; Namur, Olivier ; Toplis, Michael J. ; Devidal, Jean-Luc ; Charlier, Bernard

Contributions to Mineralogy and Petrology, 2022-09, Vol.177 (9), Article 90 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Trace element partitioning between clinopyroxene, magnetite, ilmenite and ferrobasaltic to dacitic magmas: an experimental study on the role of oxygen fugacity and melt composition
Autor: Shepherd, Kat ; Namur, Olivier ; Toplis, Michael J. ; Devidal, Jean-Luc ; Charlier, Bernard
Assuntos: Calibration ; Cations ; Clinopyroxene ; Coefficients ; Composition ; Degree of polymerization ; Divalent cations ; Earth and Environmental Science ; Earth Sciences ; Earth sciences & physical geography ; Field strength ; Fugacity ; Geochemistry and Petrology ; Geology ; Geophysics ; Ilmenite ; Intrusion ; Lattice strain ; Lava ; Magnetite ; Manganese ; Mineral Resources ; Mineral-melt partitioning ; Mineralogy ; Original Paper ; Oxidation ; Oxygen ; Oxygen fugacity ; Partitioning ; Petrology ; Physical, chemical, mathematical & earth Sciences ; Physique, chimie, mathématiques & sciences de la terre ; Polymerization ; Rare earth elements ; Rare earth metals ; Sciences de la terre & géographie physique ; Sciences of the Universe ; Titanium dioxide ; Trace element partitioning ; Trace elements ; Vanadium ; Zinc ; Zirconium
É parte de: Contributions to Mineralogy and Petrology, 2022-09, Vol.177 (9), Article 90
Notas: scopus-id:2-s2.0-85137986386
Descrição: Ilmenite-, magnetite- and clinopyroxene−melt trace element partition coefficients were investigated experimentally as a function of oxygen fugacity and melt composition in a range of synthetic ferrobasaltic bulk compositions. The experiments were performed at a constant temperature (1080 °C) and pressure (1 atm) over a range of oxygen fugacity ( f O 2 ) conditions from ca. 2 log units below to ca. 2 log units above the FMQ buffer. The partitioning behaviour of the divalent cations Zn, Mn, Co and Ni are found to be controlled by the degree of polymerisation of the coexisting melt; the partitioning behaviour of rare earth elements, Y and Sc can be explained well by the lattice strain model and the partitioning of the high-field strength elements Zr, Hf, Ta and Nb is influenced by the TiO 2 content of the melt. Vanadium partitioning is strongly influenced by oxygen fugacity and a series of linear regression equations are presented to express the dependence of the mineral−melt partitioning behaviour of the multivalent cation V on oxygen fugacity. Furthermore, calibration of the partitioning of vanadium between magnetite–ilmenite pairs as an oxybarometer is proposed and applied to a ferrobasaltic layered intrusion—the Skaergaard intrusion—to provide an estimate of oxygen fugacity.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Trace element partitioning between clinopyroxene, magnetite, ilmenite and ferrobasaltic to dacitic magmas: an experimental study on the role of oxygen fugacity and melt composition

Shepherd, Kat ; Namur, Olivier ; Toplis, Michael J. ; Devidal, Jean-Luc ; Charlier, Bernard

Berlin/Heidelberg: Springer Berlin Heidelberg

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