Melt structural control on olivine/melt element partitioning of Ca and Mn 1 1Associate editor: C. Romano

Mysen, Bjørn O.; Dubinsky, E. V.

doi:10.1016/j.gca.2003.09.010

Cited by 36 publications

(23 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quantitative relationships between partitioning and melt properties have yet to be fully elucidated, though studies have attempted to relate partitioning behavior to both melt thermodynamics (Kinzler et al, 1990;Hirschmann and Ghiorso, 1994;O'Neill and Eggins, 2002) and structure (Kohn and Schofield, 1994;Kushiro and Walter, 1998;Gaetani, 2004;Mysen and Dubinsky, 2004). We have approached the problem with an empirical thermodynamic model of the melt, but we also wish to evaluate whether structural information about the melt provides insight into the origin of the melt activity coefficient variations and their influence on partitioning.…”

Section: Melt Structure and Partitioningmentioning

confidence: 99%

“…Recent work on the importance of melt composition has focused on the polymerization state of the melt, a melt structure index, as a key variable (e.g., Libourel, 1999;Toplis and Corgne, 2002;Mysen and Dubinsky, 2004). Because the magnitude and complexity of interactions among variables in natural systems often obscure their relationships to one another, insights sometimes must first come from study of simpler systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of melt influence on divalent element partitioning between anorthite and CMAS melts

Asimow

Burnett

2006

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Section: Melt Structure and Partitioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of melt influence on divalent element partitioning between anorthite and CMAS melts

Asimow

Burnett

2006

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

“…Some recent studies, e.g. Mysen and Dubinsky (2004) and Gaetani (2004), have raised questions about the lack of incorporation of an explicit term reflecting melt composition (and hence melt structure) in predictive models that use the lattice-strain approach. However, melt composition does play an implicit role in those models via the incorporation of terms such as D Mg in WvW01, and D Fe in the van Westrenen and Draper (this issue) formulation for predicting D 0 for trivalent cation partitioning between garnet and melt; similar but more complicated involvement appears in the predictive expressions for clinopyroxene presented by Wood and Blundy (1997).…”

Section: Introductionmentioning

confidence: 99%

Quantifying garnet-melt trace element partitioning using lattice-strain theory: assessment of statistically significant controls and a new predictive model

Draper

Westrenen

2007

Contrib Mineral Petrol

View full text Add to dashboard Cite

As a complement to our efforts to update and revise the thermodynamic basis for predicting garnet-melt trace element partitioning using lattice-strain theory (van Westrenen and Draper in Contrib Mineral Petrol, this issue), we have performed detailed statistical evaluations of possible correlations between intensive and extensive variables and experimentally determined garnet-melt partitioning values for trivalent cations (rare earth elements, Y, and Sc) entering the dodecahedral garnet X-site. We applied these evaluations to a database containing over 300 partition coefficient determinations, compiled both from literature values and from our own work designed in part to expand that database. Available data include partitioning measurements in ultramafic to basaltic to intermediate bulk compositions, and recent studies in Fe-rich systems relevant to extraterrestrial petrogenesis, at pressures sufficiently high such that a significant component of majorite, the high-pressure form of garnet, is present. Through the application of lattice-strain theory, we obtained best-fit values for the ideal ionic radius of the dodecahedral garnet X-site, r 0 (3+), its apparent Young's modulus E(3+), and the strain-free partition coefficient D 0 (3+) for a fictive REE element J of ionic radius r 0 (3+). Resulting values of E, D 0 , and r 0 were used in multiple linear regressions involving sixteen variables that reflect the possible influence of garnet composition and stoichiometry, melt composition and structure, major-element partitioning, pressure, and temperature. We find no statistically significant correlations between fitted r 0 and E values and any combination of variables. However, a highly robust correlation between fitted D 0 and garnet-melt Fe-Mg exchange and D Mg is identified. The identification of more explicit melt-compositional influence is a first for this type of predictive modeling. We combine this statistically-derived expression for predicting D 0 with the new expressions for predicting E and r 0 outlined in the first of our pair of companion papers into an updated set of formulae that use easy-to-measure quantities (e.g. garnet composition, pressure, temperature) to predict variations in E, r 0 , and D 0 . These values are used in turn to calculate D values for those garnets. The updated model substantially improves upon a previous model (van Westrenen et al. in Contrib Mineral Petrol 142:219-234, 2001), and accounts well for trivalent cation partitioning in nominally anhydrous systems up to at least 15 GPa, including for eclogitic bulk compositions and for Fe-rich systems appropriate to magmagenesis on the Moon and Mars. The new model is slightly less successful in predicting partitioning with strongly majoritic garnets, although the mismatch is much less than with the original 2001 model. Although it also improves upon the 2001 model in predicting partitioning in hydrous systems, the mismatch between model and observation is still unacceptably large. The same statistical tools were applied in a...

show abstract

“…1977; Hirschmann and Ghiorso, 1994;Kohn and Schofield, 1994;Toplis, 2005;Mysen and Dubinsky, 2004;Mysen, 2007;Matzen et al, 2013), as have trace elements with other valences (for example, REE, Y, Sc, Zr, Hf and Al by Evans et al 2008).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The effect of melt composition on mineral-melt partition coefficients: The case of beryllium

Burnham

O’Neill

2016

Chemical Geology

View full text Add to dashboard Cite

Melt structural control on olivine/melt element partitioning of Ca and Mn 1 1Associate editor: C. Romano

Cited by 36 publications

References 42 publications

Determination of melt influence on divalent element partitioning between anorthite and CMAS melts

Determination of melt influence on divalent element partitioning between anorthite and CMAS melts

Quantifying garnet-melt trace element partitioning using lattice-strain theory: assessment of statistically significant controls and a new predictive model

The effect of melt composition on mineral-melt partition coefficients: The case of beryllium

Contact Info

Product

Resources

About