Experimental determination of REE partition coefficients between amphibole and basaltic to andesitic liquids at high pressure

T. H. Green*, N. J. Pearson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)

Abstract

Amphibole/liquid partition coefficients for the REE(Damph/liq REE) obtained from natural rocks increase systematically with bulk rock compositional change from basalt to rhyolite and are higher for the middle to heavy REE. Five new experimentally determined sets of DREE (La, Sm, "Eu2+", Ho, Lu)and 4 published sets are similar to these data and provide values for use in geochemical modelling of magmatic processes involving amphibole, over a range of temperature, pressure and oxygen fugacity. The partition coefficients increase significantly with decreasing temperature, and increase slightly with increasing oxygen fugacity. Pressure does not appear to have a major effect, although one data set suggests increased pressure lowers Damph/liq REE in a basaltic composition.

Original languageEnglish
Pages (from-to)1465-1468
Number of pages4
JournalGeochimica et Cosmochimica Acta
Volume49
Issue number6
DOIs
Publication statusPublished - 1985

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