Evidence for the early differentiation of the core from Pt–Re–Os isotope systematics of 2.8-Ga komatiites

Abstract

Komatiite samples from the 2.8-Ga Kostomuksha greenstone belt in the Baltic Shield define Pt–Os and Re–Os isochrons with ages of 2816F190 and 2880F83 Ma, respectively. The mean initial Os / Os and Os / Os ratios calculated at T=2821 Ma are 0.1198341F7 and 0.11042F69 (cOs=+2.5F0.6), respectively. This Os isotopic composition characterizes that of the source… (More)

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@inproceedings{Puchtel2005EvidenceFT, title={Evidence for the early differentiation of the core from Pt–Re–Os isotope systematics of 2.8-Ga komatiites}, author={Igor S. Puchtel and Alan D. Brandon and Munir Humayun and Richard J. Walker}, year={2005} }