Some experimentally determined zircon/liquid partition coefficients for the rare earth elements

Details Some experimentally determined zircon/liquid partition coefficients for the rare earth elements Some experimentally determined zircon/liquid partition coefficients for the rare earth elements

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..895w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Issue 6, pp.895-897

Physics

18

Scientific paper

Partition coefficients for La, Sm, Ho and Lu (REE) between synthetic zircon and felsic, peralkaline liquid were determined at 800°C and 2 kbar water pressure by adding small amounts of REE to experimental charges and analyzing zircons in the quenched runs with an electron microprobe. The preferred zircon/liquid partition coefficients obtained by this method are: La, 1.4-2.1; Sm, 26-40; Ho, 340+; Lu, 72-126. These results confirm the strong heavy rare earth enrichment discovered by Nagasawa (1970) in zircon separates from dacites and granites, but they also introduce a modification to the supposed zircon/liquid partition coefficient pattern. The heavy REE end of the pattern is concave downward, in qualitative resemblance to some garnet/liquid and hornblende/liquid REE partitioning patterns.

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