Reports

Europium Anomaly in Plagioclase Feldspar: Experimental Results and Semiquantitative Model

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Science  08 Jun 1973:
Vol. 180, Issue 4090, pp. 1059-1060
DOI: 10.1126/science.180.4090.1059

Abstract

The partition of europium between plagioclase feldspar and magmatic liquid is considered in terms of the distribution coefficients for divalent and trivalent europium. A model equation is derived giving the europium anomaly in plagioclase as a function of temperature and oxygen fugacity. The model explains europium anomalies in plagioclase synthesized under controlled laboratory conditions as well as the variations of the anomaly observed in natural terrestrial and extraterrestrial igneous rocks.