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CitationBarrat, J. A., Bohn, M., Gillet, P., & Yamaguchi, A. (2009). Evidence for K‐rich terranes on Vesta from impact spherules. Meteoritics & Planetary Science, 44(3), 359-374.
PublisherThe Meteoritical Society
JournalMeteoritics & Planetary Science
AbstractThe howardite-eucrite-diogenite (HED) clan is a group of meteorites that probably originate from the asteroid Vesta. Some of them are complex breccias that contain impact glasses whose compositions mirror that of their source regions. Some K-rich impact glasses (up to 2 wt% K2O) suggest that in addition to basalts and ultramafic cumulates, K-rich rocks are exposed on Vestas surface. One K-rich glass (up to 6 wt% K2O), with a felsic composition, provides the first evidence of highly differentiated K-rich rocks on a large asteroid. They can be compared to the rare lunar granites and suggest that magmas generated in a large asteroid are more diverse than previously thought.