Determination of the samarium-neodymium ratio for the purpose of geochronology

Details Determination of the samarium-neodymium ratio for the purpose of geochronology Determination of the samarium-neodymium ratio for the purpose of geochronology

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987geokh.....1115z&link_type=abstract

Geokhimiia (ISSN 0016-7525), Aug. 1987, p. 1115-1129. In Russian.

Mathematics

Logic

Geochemistry, Geochronology, Neodymium Isotopes, Ratios, Samarium Isotopes, Geology, Mass Spectroscopy

Scientific paper

A procedure for determining, with an accuracy of 0.1 percent, the Sm/Nd ratios in various geological samples is discussed. The proposed method is based on the use of a mixed tracer, Nd-150 + Sm-149. The final result of mass-spectroscopic analysis by this method yields three isotope ratios: Nd-143/Nd-144 in the sample, and 'true', corrected Nd-150/Nd-144 and Sm-149/Sm-147 ratios in the sample-tracer mixture. Both the content and the isotope composition of Nd can be determined in a single mass-spectroscopic experiment. The broad range of the optimal tracer/sample ratios that can be used makes it possible to omit preliminary analyses of Sm and Nd concentrations in the sample.

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