Lattice strain model for rare earth element partitioning between apatite and silicate melt: effect of apatite/melt composition and temperature with implications for lunar basalts

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10496220" target="_blank" >RIV/00216208:11310/25:10496220 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lyaLL6OKIS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lyaLL6OKIS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00710-024-00878-x" target="_blank" >10.1007/s00710-024-00878-x</a>

Result language

angličtina

Original language name

Lattice strain model for rare earth element partitioning between apatite and silicate melt: effect of apatite/melt composition and temperature with implications for lunar basalts

Original language description

We present new parameterized lattice strain models to predict the apatite/silicate melt partition coefficients of the rare earth elements (REE) in natural magmatic systems as a function of temperature and melt composition with high accuracy and precision. We collected published experimental REE partition coefficients for apatite coexisting with melt ranging from picrobasaltic to rhyolitic and phonolitic composition. Resulting dataset was analysed using the lattice strain model to assess the data quality. The three lattice strain parameters (D(0), r(0), and E) were subjected to a multivariate nonlinear least-squares analysis as a function of intensive variables, and we attempted to develop two independent models, on the basis of melt and apatite composition. In melt composition-based model, it was found that the D0 parameter increases with increasing melt polymerization, which can be expressed by the newly proposed simplified melt polymerization index P.I. = [X(SiO2) + 2X(Al2O3) + X(TiO2) + 2X(P2O5)] / [X(MgO) + X(FeO) + X(CaO) + 2X(alk)], where individual X(i) variables represent the molar fractions of the oxides in the melt. By disentangling the effect of each component of the P.I., it was found that the CaO content of the melt is the oxide that affects more the D(0) parameter. Thus, the D(0) parameter is expressed as a power law function of melt CaO content. Through extensive search of the parameter space, the E and r(0) variables were found to correlate strongly with linear combination of melt CaO, P2O5 and of reciprocal temperature, 1/T. Based on the apatite composition, we could not find any dependence of the partitioning parameters on compositional variables that would outperform solely a reciprocal temperature-based fit. The new parameterization was applied to predict REE partition coefficients in lunar basalts and suggests that lunar apatite could only equilibrate with evolved melt at late stages of fractional crystallisation.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA23-04734S" target="_blank" >GA23-04734S: Experimental determination of Be diffusivity in pyroxenes and plagioclase: a new tool for geospeedometry</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Mineralogy and Petrology

ISSN

0930-0708

e-ISSN

1438-1168

Volume of the periodical

119

Issue of the periodical within the volume

1

Country of publishing house

AT - AUSTRIA

Number of pages

19

Pages from-to

1-19

UT code for WoS article

001377554900001

EID of the result in the Scopus database

2-s2.0-105003280789