The partitioning of Zr and Nb between diopside and melts in the system diopside-albite-anorthite

Details The partitioning of Zr and Nb between diopside and melts in the system diopside-albite-anorthite The partitioning of Zr and Nb between diopside and melts in the system diopside-albite-anorthite

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..623d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Issue 4, pp.623-629

Physics

5

Scientific paper

The crystal liquid partitioning of Zr and Nb has been measured experimentally between diopsidic clinopyroxene and melts in the system Di-Ab-An. Nb was found to be excluded from diopside (D(Nb) is always less than 0.02). D(Zr) is quite variable, ranging from 0.05 to 0.45. D(Zr) is positively correlated with the Al content of both the melt and the pyroxene and is negatively correlated with temperature. Both D(Zr) and D(Nb) were found to be independent of oxygen fugacity. This implies that neither Zr or Nb suffer valence changes over a range of oxygen fugacities spanning both lunar and terrestrial conditions.

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