Abstract
Internal chemical inhomogeneity in a single euhedral olivine from the Murchison C2 chondrite has been visualized by a two dimensional element concentration map technique, as applications of automated electron probe microanalyzer. The olivine crystal has a double layered structure which consists of rather homogeneous inner region (from 0 to 200μm in dia., Fa27) and outer region with a zonal structure (from 200 to 300μm in dia., Fa27∼Fa33). Al, Cr-rich, Fe, Mg silicate inclusions exist in the outer region of the olivine. These features might have been established in a cooling solar nebula, reflecting the presence of two different environmental conditions during crystal growth of the single olivine.
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