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Ancient relative and absolute ages for a basaltic meteorite: Implications for timescales of planetesimal accretion and differentiation

Wadwa, M; Amelin, Yuri; Bogdanovski, O; Shukolyukov, A; Lugmair, G W; Janney, P


Asuka 881394 is a unique basaltic meteorite that originated in the crust of a differentiated planetesimal in the early Solar System. We present high precision Pb, Mg, and Cr isotopic compositions of bulk samples and mineral separates from this achondrite. A207Pb-206Pb internal isochron obtained from the radiogenic pyroxene and whole-rock fractions of Asuka 881394 yields an absolute age of 4566.5 ± 0.2 Ma, which we consider to be the best estimate for the crystallization age of this basaltic...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2009.04.043


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