Physics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50...69m&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 50, Jan. 1986, p. 69-79.
Physics
30
Basalt, Chemical Fractionation, Olivine, Rare Earth Elements, Crystallography, Liquid Metals, Lunar Rocks, Metal Crystals, Metallic Glasses
Scientific paper
The calculation of partial coefficients for Nd, Sm, Gd, and Yb between olivine and synthetic basaltic melts using the percent level doping technique and microprobe analytical techniques is examined. The experimental and analytical procedures are described. The relationship between rare earth elements (REEs) concentrations and crystal margins caused by Rees X-rays from surrounding glass is discussed. Average olivine/liquid distribution coefficients for Nd, Sm, Gd, and Yb for mare and highlands basaltic melts are presented. The data reveal that the distribution coefficients for light REEs are lower than those obtained in previous studies, and the slope of the olivine/liquid distribution coefficient pattern is steeper; potential sources of error in the previous and present studies which could explain the differences in distribution coefficients and slope are investigated.
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