Crystal chemical effects on the partitioning of trace elements between mineral and melt - an experimental study of melilite with applications to refractory inclusions from carbonaceous chondrites

Details Crystal chemical effects on the partitioning of trace elements between mineral and melt - an experimental study of melilite with applications to refractory inclusions from carbonaceous chondrites Crystal chemical effects on the partitioning of trace elements between mineral and melt - an experimental study of melilite with applications to refractory inclusions from carbonaceous chondrites

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.1755b&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, June 1990, p. 1755-1774.

Computer Science

18

Carbonaceous Chondrites, Concentration (Composition), Meteoritic Composition, Minerals, Trace Elements, Barium, Beryllium, Crystallization, Inclusions, Spinel, Meteorites, Crystals, Chemistry, Partitioning, Trace Elements, Minerals, Experiments, Melilite, Refractory Material, Inclusions, C Chondrites, Stony Meteorites, Procedure, Laboratory Studies, Ion Probe Methods, Crystallization, Zoning, Procedure, Major Elements, Beryllium, Cais, Lanthanum, Thermodynamics, Calculations, Distribution, Equilibrium, Tech

Scientific paper

Results are presented on the partitioning experiments for trace elements Be, Sc, Ba, La, Ce, and Tm between melilite and melt for a bulk composition relevant to Type B inclusions, using a technique, described by Brody and Flemings (1966), by which distributon coeffecients can be obtained over the entire range of crystallization from trace element analysis of a single zoned crystal. Zoned crystals of melilite were grown during controlled cooling rate experiments, and trace element concentrations were determined by SIMS. At each step in the crystal growth, trace element concentrations in the coexisting melt were determined by mass balance, using stepwise integration of a Rayleigh fractionation equation.

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