[PPS10-P12] Multiple sulfur isotopic composition of mesosiderite meteorites: Implication for formation processes
Keywords:Mesosiderites, Sulfur isotopes, Meteorite
According to Clayton et al. (1996), the D17O value suggested the genetic links with pallasites, IIIAB iron meteorites, and HED. In this study, the values of sulfur isotopes of mesosiderites indicate similar value with IIIAB iron meteorites and pallasites but not similar to HED. This result suggest that the sulfur isotopic composition does not track their parent body but may relate to metal-silicate reaction.
The formation process of mesosiderites is explained by hit-and-run model (Haba et al. 2019). In this study, comparing D33S value of mesosiderites and HED. Mesosiderites and diogenites had experienced similar environment of formation. Also, including to consider about offset of the value of stony-iron meteorites by their metal phase and silicate phase, the material of mesosiderite can be diogenitic silicate and origin of ⅠC, ⅡAB, ⅢAB, and ⅣA iron meteorites or howarditic silicate and origin of IAB or IVB iron meteorites.