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Unraveling the evolution of chondrite parent asteroids by precise U-Pb dating and thermal modeling

Amelin, Yuri; Ghosh, Amitabha; Rotenberg, E


U-Th-Pb isotopic data are reported for mineral fractions, individual chondrules and fractions of chondrule fragments from the equilibrated ordinary chondrite Richardton (H5). Chondrules and milligram-sized fractions of pyroxene-rich chondrule fragments contain highly radiogenic Pb and concordant or nearly concordant U-Th-Pb isotopic systems, and are suitable for precise Pb-Pb age determinations. Olivine and sulfide have low U concentrations and contain less radiogenic Pb. The ages of individual...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2004.05.047


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