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. 2016 Jul 1;2(7):e1601001. doi: 10.1126/sciadv.1601001

Fig. 2. Oxygen isotopic variations of SAMs and coexisting olivines within chondrules of the Kaba and Vigarano CV3 chondrites.

Fig. 2

The orange field corresponds to the O-isotopic composition of the impact plume with which the chondrules equilibrated, as modeled (see text) to reproduce the O-isotopic composition of SAMs. There is no meteorite parent body known, either primitive (pink field) or differentiated (blue field), that corresponds to this composition. However, outer-belt icy planetesimals (enriched in 17,18O) would have oxygen isotopic composition corresponding to the impact plume. The inset shows the typical range of oxygen isotopic compositions established for the Sun, CAIs, and chondrules and ice present in meteorites. CCAM, carbonaceous chondrite anhydrous mineral.