Computer Science
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.3287h&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 55, Nov. 1991, p. 3287-3302.
Computer Science
45
Basalt, Geochemistry, Rare Earth Compounds, Syenite, Zirconium Compounds, Cerium, Chondrites, Distribution (Property), Ion Probes, Trace Elements
Scientific paper
Large zircon crystals from rocks of alkaline infinities were analyzed using a ion microprobe. The chondrite-normalized REE concentrations are found to increase rapidly from La to Lu, as would be expected from the decrease in the ionic radius and consequent easier substitution into the Zr site within the zircon lattice. It is suggested that the partition coefficients for the light REEs, between zircon and melt or a whole rock, are significantly lower than those calculated using the bulk analyses. Estimates of the partition coefficients of Ce(3+) and Ce(4+) between zircon and melt demonstrate that although the Ce anomalies are large the Ce(4+)/Ce(3+) ratio is very small (less than 0.003).
Hinton Richard W.
Upton Brian G. J.
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