Toward understanding of isotopic homogenization processes in the early solar system: Various types of hibonite-bearing inclusions from the Murchison CM2 chondrite.

Abstract

In order to better understand isotopic homogenization processes in the early solar system, we are planning to conduct multi-isotope analyses using SIMS on hibonite-bearing inclusions from CM chondrites. We applied freeze-thaw separation, density separation and hand-picking to the Murchison CM2 chondrite and succeeded to separate several tens of hibonite-bearing inclusions. Various types of hibonite-bearing inclusions, including new types, were found in the present study. Here we report SEM-EDS analyses of these newly separated inclusions and discuss possible formation conditions for them.