Rare earth elements in tektites |
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Authors: | Vladimír Bou?ka Zdeněk ?anda |
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Institution: | Department of Mineralogy, Geochemistry and Crystallography, Faculty of Science, Charles University, Prague, Czechoslovakia;Institute of Mineral Raw Materials, Kutnà Hora, Czechoslovakia |
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Abstract: | Four moldavites and one sample each of an australite, billitonite, indochinite, philippinite, thailandite, Ivory Coast tektite, bediasite and a georgianite were analyzed using neutron activation analysis for La, Ce, Sm, Eu, Tb, Yb and Lu. The REE abundances resemble those of sedimentary rocks. Most of the tektites display a depletion of Eu, a characteristic feature of mature Phanerozoic continental sedimentary rocks. However, the Ivory Coast tektite and georgianite are relatively enriched in Eu, possibly due to the presence of plagioclase-rich source rocks. |
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