Abstract
THE ages of lead of Earth and of meteorites are commonly based on the assumption that when these bodies were formed they contained lead of the same isotopic composition1,2. The present differences in the isotopic compositions of the lead in meteorites and also between common terrestrial lead and meteorite lead are due to radiogenic contributions from uranium and thorium since that time.
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FIREMAN, E., FISHER, D. Uranium in the Sikhote-Alin Meteorite and its Relation to the Lead Method of Age Determination. Nature 192, 644–645 (1961). https://doi.org/10.1038/192644a0
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DOI: https://doi.org/10.1038/192644a0
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