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MnO (wt%) vs. mol.% Fa for olivine grains in chondrules from Murchison. Data from CO3.0 (Jones, 1992), Acfer 094 (Ushikubo et al., 2012), and Paris (Hewins et al., 2014) are shown for comparison, as well as the fields defined by the CR (Berlin et al., 2011; Frank et al., 2014; Schrader et al., 2015) and unequilibrated ordinary chondrites (UOC) (Frank et al., 2014; and references therein). The CI ratio is represented by the solid line (data from Anders and Grevesse, 1989).
