Evidence for K-rich terranes on Vesta from impact spherules

Details Evidence for K-rich terranes on Vesta from impact spherules Evidence for K-rich terranes on Vesta from impact spherules

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009m%26ps...44..359b&link_type=abstract

Meteoritics & Planetary Science, vol. 44, Issue 3, p.359-374

Computer Science

8

Granites, Impact Spherules, Vesta Asteroid, Named, Hed Meteorites

Scientific paper

The 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 Vesta’s 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.

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