Lead Isotopic Ages of Chondrules and Calcium-Aluminum-Rich Inclusions
@article{Amelin2002LeadIA,
title={Lead Isotopic Ages of Chondrules and Calcium-Aluminum-Rich Inclusions},
author={Yuri Amelin and Alexander N. Krot and Ian Douglass Hutcheon and Alexander A. Ulyanov},
journal={Science},
year={2002},
volume={297},
pages={1678 - 1683}
}The lead-lead isochron age of chondrules in the CR chondrite Acfer 059 is 4564.7 ± 0.6 million years ago (Ma), whereas the lead isotopic age of calcium-aluminum–rich inclusions (CAIs) in the CV chondrite Efremovka is 4567.2 ± 0.6 Ma. This gives an interval of 2.5 ± 1.2 million years (My) between formation of the CV CAIs and the CR chondrules and indicates that CAI- and chondrule-forming events lasted for at least 1.3 My. This time interval is consistent with a 2- to 3-My age difference between…
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