Effects of P2O5 and TiO2 on the partial melting of spinel Lherzolite in the system CaO-MgO-Al2 O3-SiO2 at 1.1 GPa

Xi Liu; Hugh St C. O'Neill

doi:10.2113/gscanmin.45.3.649

Effects of P₂O₅ and TiO₂ on the partial melting of spinel Lherzolite in the system CaO-MgO-Al₂ O₃-SiO₂ at 1.1 GPa

Xi Liu^*, Hugh St C. O'Neill

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The effects of small amounts of P₂O₅ on the partial melting of model spinel lherzolite in the system CaO-MgO- Al₂O₃- SiO₂ + P₂O₅ have been investigated at 1.1 GPa in piston-cylinder experiments, in order to constrain the influence of this minor component on mantle melting. A concentration of 1 wt% P₂O₅ in the melt depresses the solidus of spinel lherzolite by only 2°C, reduces SiO₂ in melts by 1 wt% and Al₂O₃ by 0.44 wt%, but increases CaO by 0.3 wt% and MgO by 0.14 wt%. A preliminary investigation of the effect of TiO₂ in the system CaO- MgO-Al₂ O₃-SiO₂ + TiO₂ shows that it decreases the solidus by ∼1°C/wt%, and its effect on the melt composition is small, being mainly one of dilution.

Original language	English
Pages (from-to)	649-655
Number of pages	7
Journal	Canadian Mineralogist
Volume	45
Issue number	3
DOIs	https://doi.org/10.2113/gscanmin.45.3.649
Publication status	Published - Jun 2007

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title = "Effects of P2O5 and TiO2 on the partial melting of spinel Lherzolite in the system CaO-MgO-Al2 O3-SiO2 at 1.1 GPa",

abstract = "The effects of small amounts of P2O5 on the partial melting of model spinel lherzolite in the system CaO-MgO- Al2O3- SiO2 + P2O5 have been investigated at 1.1 GPa in piston-cylinder experiments, in order to constrain the influence of this minor component on mantle melting. A concentration of 1 wt% P2O5 in the melt depresses the solidus of spinel lherzolite by only 2°C, reduces SiO2 in melts by 1 wt% and Al2O3 by 0.44 wt%, but increases CaO by 0.3 wt% and MgO by 0.14 wt%. A preliminary investigation of the effect of TiO2 in the system CaO- MgO-Al2 O3-SiO2 + TiO2 shows that it decreases the solidus by ∼1°C/wt%, and its effect on the melt composition is small, being mainly one of dilution.",

keywords = "CMAS + PO, CMAS + TiO, Partial melting, Solidus, Spinel lherzolite",

author = "Xi Liu and O'Neill, {Hugh St C.}",

year = "2007",

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AU - Liu, Xi

AU - O'Neill, Hugh St C.

PY - 2007/6

Y1 - 2007/6

N2 - The effects of small amounts of P2O5 on the partial melting of model spinel lherzolite in the system CaO-MgO- Al2O3- SiO2 + P2O5 have been investigated at 1.1 GPa in piston-cylinder experiments, in order to constrain the influence of this minor component on mantle melting. A concentration of 1 wt% P2O5 in the melt depresses the solidus of spinel lherzolite by only 2°C, reduces SiO2 in melts by 1 wt% and Al2O3 by 0.44 wt%, but increases CaO by 0.3 wt% and MgO by 0.14 wt%. A preliminary investigation of the effect of TiO2 in the system CaO- MgO-Al2 O3-SiO2 + TiO2 shows that it decreases the solidus by ∼1°C/wt%, and its effect on the melt composition is small, being mainly one of dilution.

AB - The effects of small amounts of P2O5 on the partial melting of model spinel lherzolite in the system CaO-MgO- Al2O3- SiO2 + P2O5 have been investigated at 1.1 GPa in piston-cylinder experiments, in order to constrain the influence of this minor component on mantle melting. A concentration of 1 wt% P2O5 in the melt depresses the solidus of spinel lherzolite by only 2°C, reduces SiO2 in melts by 1 wt% and Al2O3 by 0.44 wt%, but increases CaO by 0.3 wt% and MgO by 0.14 wt%. A preliminary investigation of the effect of TiO2 in the system CaO- MgO-Al2 O3-SiO2 + TiO2 shows that it decreases the solidus by ∼1°C/wt%, and its effect on the melt composition is small, being mainly one of dilution.

KW - CMAS + PO

KW - CMAS + TiO

KW - Partial melting

KW - Solidus

KW - Spinel lherzolite

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JO - Canadian Mineralogist

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ER -

Effects of P₂O₅ and TiO₂ on the partial melting of spinel Lherzolite in the system CaO-MgO-Al₂ O₃-SiO₂ at 1.1 GPa

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