Oxygen isotope measurements have played a key role in establishing the way the solar system has formed. On Earth mass-dependent fractionation constrains conditions under which oxygen distributes itself among different phases. In the solar system, oxygen can experience kinetic fractionation as well, but the predominant cosmochemical signature is variability in16O. This was first recognised in refractory inclusions, the oldest known materials in the solar system, where 4% excesses in16O were...[Show more]
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