Rare earths, other trace elements and iron in Luna 20 samples

Details Rare earths, other trace elements and iron in Luna 20 samples Rare earths, other trace elements and iron in Luna 20 samples

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..869h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.869-874

Physics

2

Scientific paper

The results of the analysis by neutron activation of six samples from the Luna 20 mission and one sample of < 1 mm fines from Apollo 16 are reported. The concentrations of the rare-earth elements (REE) in the samples of fines from Luna 20 and Apollo 16 are less than those found for corresponding materials from the mare areas but a negative Eu anomaly is still present. The concentrations of the REE in fines from Luna 20 are only about two-thirds as great as in the sample of Apollo 16 fines, but the concentrations of Co, Sc and Cr are greater by factors ranging from 1.5 to 2.3.

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