The effects of pressure and temperature on the partitioning of Ti, Sr and REE between amphibole, clinopyroxene and basanitic melts

J. Adam; T. H. Green

doi:10.1016/0009-2541(94)90129-5

The effects of pressure and temperature on the partitioning of Ti, Sr and REE between amphibole, clinopyroxene and basanitic melts

J. Adam^*, T. H. Green

^*Corresponding author for this work

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

191 Citations (Scopus)

Abstract

An electron microprobe was used to measure partition coefficients (D-values) for Ti, Sr, La, Sm, Ho and Lu in amphiboles, clinopyroxenes and Sr- and REE-enriched basanitic melts. D-values were found to be negatively correlated with pressure at pressures from 0.5 to 3.0 GPa. This effect is greatest for Ti and smallest for Lu. Changes in D-values accompanying changes in temperature are less apparent than those caused by changes in pressure. Only D_Lu for clinopyroxene shows a small but consistent increase as temperature increases from 1050° to 1200°C. D-values for amphibole are not noticeably affected by changes in f_O2. In contrast, D-values for clinopyroxene become larger as f_O2 increases. The correlations between D-values and pressure may be related to changes in site volumes and electrostatic potentials accompanying shifts in the relative concentrations of Al^IV, Al^VI and Na⁺.

Original language	English
Pages (from-to)	219-233
Number of pages	15
Journal	Chemical Geology
Volume	117
Issue number	1-4
DOIs	https://doi.org/10.1016/0009-2541(94)90129-5
Publication status	Published - 1 Nov 1994

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title = "The effects of pressure and temperature on the partitioning of Ti, Sr and REE between amphibole, clinopyroxene and basanitic melts",

abstract = "An electron microprobe was used to measure partition coefficients (D-values) for Ti, Sr, La, Sm, Ho and Lu in amphiboles, clinopyroxenes and Sr- and REE-enriched basanitic melts. D-values were found to be negatively correlated with pressure at pressures from 0.5 to 3.0 GPa. This effect is greatest for Ti and smallest for Lu. Changes in D-values accompanying changes in temperature are less apparent than those caused by changes in pressure. Only DLu for clinopyroxene shows a small but consistent increase as temperature increases from 1050° to 1200°C. D-values for amphibole are not noticeably affected by changes in fO2. In contrast, D-values for clinopyroxene become larger as fO2 increases. The correlations between D-values and pressure may be related to changes in site volumes and electrostatic potentials accompanying shifts in the relative concentrations of AlIV, AlVI and Na+.",

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T1 - The effects of pressure and temperature on the partitioning of Ti, Sr and REE between amphibole, clinopyroxene and basanitic melts

AU - Adam, J.

AU - Green, T. H.

PY - 1994/11/1

Y1 - 1994/11/1

N2 - An electron microprobe was used to measure partition coefficients (D-values) for Ti, Sr, La, Sm, Ho and Lu in amphiboles, clinopyroxenes and Sr- and REE-enriched basanitic melts. D-values were found to be negatively correlated with pressure at pressures from 0.5 to 3.0 GPa. This effect is greatest for Ti and smallest for Lu. Changes in D-values accompanying changes in temperature are less apparent than those caused by changes in pressure. Only DLu for clinopyroxene shows a small but consistent increase as temperature increases from 1050° to 1200°C. D-values for amphibole are not noticeably affected by changes in fO2. In contrast, D-values for clinopyroxene become larger as fO2 increases. The correlations between D-values and pressure may be related to changes in site volumes and electrostatic potentials accompanying shifts in the relative concentrations of AlIV, AlVI and Na+.

AB - An electron microprobe was used to measure partition coefficients (D-values) for Ti, Sr, La, Sm, Ho and Lu in amphiboles, clinopyroxenes and Sr- and REE-enriched basanitic melts. D-values were found to be negatively correlated with pressure at pressures from 0.5 to 3.0 GPa. This effect is greatest for Ti and smallest for Lu. Changes in D-values accompanying changes in temperature are less apparent than those caused by changes in pressure. Only DLu for clinopyroxene shows a small but consistent increase as temperature increases from 1050° to 1200°C. D-values for amphibole are not noticeably affected by changes in fO2. In contrast, D-values for clinopyroxene become larger as fO2 increases. The correlations between D-values and pressure may be related to changes in site volumes and electrostatic potentials accompanying shifts in the relative concentrations of AlIV, AlVI and Na+.

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U2 - 10.1016/0009-2541(94)90129-5

DO - 10.1016/0009-2541(94)90129-5

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VL - 117

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JO - Chemical Geology

JF - Chemical Geology

IS - 1-4

ER -

The effects of pressure and temperature on the partitioning of Ti, Sr and REE between amphibole, clinopyroxene and basanitic melts

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