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Formation of spinel-,hibonite-rich inclusions found in CM2 carbonaceous chondrites

Simon, Steven B; Grossman, L; Hutcheon, Ian D; Phinney, Douglas L; Webber, Peter K; Fallon, Stewart


We report petrography, mineral chemistry, bulk chemistry, and bulk isotopic compositions of a suite of 40 spinel-rich inclusions from the Murchison (CM2) carbonaceous chondritc. Seven types of inclusions have been identified based on mineral assemblage: spinel-hibonite-perovskite; spinel-perovskite-pyroxene; spinel-perovskite-melilite; spinel-hibonite-perovskite-melilite; spinel-hibonite; spinel-pyroxene; and spinel-melilite-anorthite. Hibonite-bearing inclusions have Ti-poor spinel compared to...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: American Mineralogist
DOI: 10.2138/am.2006.2130


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