Extension of lattice strain theory to mineral/mineral rare-earth element partitioning: An approach for assessing disequilibrium and developing internally consistent partition coefficients between olivine, orthopyroxene, clinopyroxene and basaltic melt

Lee, Cin-Ty A.; Harbert, Artemis; Leeman, William P.

doi:10.1016/j.gca.2006.09.014

Cited by 108 publications

(75 citation statements)

References 57 publications

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“…Trace-element partition coefficients between co-existing clino-and orthopyroxene (Kd CPX/OPX ) phases are broadly analogous to those reported in previous studies of mantle peridotites (e.g., Stosch, 1982;Bodinier et al, 1988;Eggins et al, 1998;Witt-Eickschen and O'Neill, 2005;Lee et al, 2007;Harvey et al, 2010;Appendix B). Absolute values of REE Kd CPX/OPX are relatively high in the studied sample suite that has equilibration temperatures of $800°C or less.…”

Section: Bulk-rock and Pyroxene Trace-element Characteristicssupporting

confidence: 78%

Mineralogical and geochemical constraints on the shallow origin, ancient veining, and multi-stage modification of the Lherz peridotite

Riches

Rogers

2011

Geochimica et Cosmochimica Acta

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Section: Bulk-rock and Pyroxene Trace-element Characteristicssupporting

confidence: 78%

Mineralogical and geochemical constraints on the shallow origin, ancient veining, and multi-stage modification of the Lherz peridotite

Riches

Rogers

2011

Geochimica et Cosmochimica Acta

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“…Published studies of Opx-melt partitioning (Barnes 1986;Colson et al 1988;Colson and Gust 1989;Nielsen et al 1992;Kennedy et al 1993;Schwandt and McKay 1998;Canil 1999;Green et al 2000;McDade et al 2003;Adam and Green 2006;Klemme et al 2006;Lee et al 2007;Bédard 2007;Frei et al 2009) show enormous variations in D values (Fig. 1), e.g.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational study of trace element distribution between orthopyroxene and anhydrous silicate melt: substitution mechanisms and the effect of iron

Parker¹,

Liebscher

Frei

et al. 2009

Contrib Mineral Petrol

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Although orthopyroxene (Opx) is present during a wide range of magmatic differentiation processes in the terrestrial and lunar mantle, its effect on melt trace element contents is not well quantified. We present results of a combined experimental and computational study of trace element partitioning between Opx and anhydrous silicate melts. Experiments were performed in air at atmospheric pressure and temperatures ranging from 1,326 to 1,420°C in the system CaO-MgO-Al 2 O 3 -SiO 2 and subsystem CaOMgO-SiO 2 . We provide experimental partition coefficients for a wide range of trace elements (large ion lithophile: Li, Be, B, K, Rb, Sr, Cs, Ba, Th, U; rare earth elements, REE: La, $ 0:058, and are all virtually independent of temperature. Cr and Co are the only compatible trace elements at the studied conditions. To elucidate charge-balancing mechanisms for incorporation of REE into Opx and to assess the possible influence of Fe on Opx-melt partitioning, we compare our experimental results with computer simulations. In these simulations, we examine major and minor trace element incorporation into the end-members enstatite (Mg 2 Si 2 O 6 ) and ferrosilite (Fe 2 Si 2 O 6 ). Calculated solution energies show that R 2? cations are more soluble in Opx than R 3? cations of similar size, consistent with experimental partitioning data. In addition, simulations show charge balancing of R 3? cations by coupled substitution with Li ? on the M1 site that is energetically favoured over coupled substitution involving Al-Si exchange on the tetrahedrally coordinated site. We derived best-fit values for ideal ionic radii r 0 , maximum partition coefficients D 0 , and apparent Young's moduli E for substitutions onto the Opx M1 and M2 sites. Experimental r 0 values for R 3? substitutions are 0.66-0.67 Å for M1 and 0.82-0.87 Å for M2. Simulations for enstatite result in r 0 = 0.71-0.73 Å for M1 and *0.79-0.87 Å for M2. Ferrosilite r 0 values are systematically larger by *0.05 Å for both M1 and M2. The latter is opposite to experimental literature data, which appear to show a slight decrease in r M2 0 in the presence of Fe. Additional systematic studies in Febearing systems are required to resolve this inconsistency and to develop predictive Opx-melt partitioning models for use in terrestrial and lunar magmatic differentiation models.

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“…In order to investigate the geochemical signature of gabbro-forming parental melts of Ojén and Ronda gabbroic rocks, we have calculated the melt in trace-element exchange equilibrium with clinopyroxene using the REE compositions of clinopyroxene in gabbroic rocks and crystalliquid distribution coefficients for basaltic systems (Lee et al, 2007) (Fig. 8).…”

Section: Geochemical Signature Of Gabbro-forming Parental Meltsmentioning

confidence: 99%

Hyperextension of continental to oceanic-like lithosphere: The record of late gabbros in the shallow subcontinental lithospheric mantle of the westernmost Mediterranean

et al. 2015

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Extension of lattice strain theory to mineral/mineral rare-earth element partitioning: An approach for assessing disequilibrium and developing internally consistent partition coefficients between olivine, orthopyroxene, clinopyroxene and basaltic melt

Cited by 108 publications

References 57 publications

Mineralogical and geochemical constraints on the shallow origin, ancient veining, and multi-stage modification of the Lherz peridotite

Mineralogical and geochemical constraints on the shallow origin, ancient veining, and multi-stage modification of the Lherz peridotite

Experimental and computational study of trace element distribution between orthopyroxene and anhydrous silicate melt: substitution mechanisms and the effect of iron

Hyperextension of continental to oceanic-like lithosphere: The record of late gabbros in the shallow subcontinental lithospheric mantle of the westernmost Mediterranean

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