Oxygen Isotope Variation in Stony-Iron Meteorites

Details Oxygen Isotope Variation in Stony-Iron Meteorites Oxygen Isotope Variation in Stony-Iron Meteorites

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...313.1763g&link_type=abstract

Science, Volume 313, Issue 5794, pp. 1763-1765 (2006).

Computer Science

30

Scientific paper

Asteroidal material, delivered to Earth as meteorites, preserves a record of the earliest stages of planetary formation. High-precision oxygen isotope analyses for the two major groups of stony-iron meteorites (main-group pallasites and mesosiderites) demonstrate that each group is from a distinct asteroidal source. Mesosiderites are isotopically identical to the howardite-eucrite-diogenite clan and, like them, are probably derived from the asteroid 4 Vesta. Main-group pallasites represent intermixed core-mantle material from a single disrupted asteroid and have no known equivalents among the basaltic meteorites. The stony-iron meteorites demonstrate that intense asteroidal deformation accompanied planetary accretion in the early Solar System.

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