Asteroids and andesites

Richard Arculus (), Ian H. Campbell (), Scott M. McLennan and Stuart Ross Taylor ()
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Richard Arculus: Research School of Earth Sciences, Australian National University
Ian H. Campbell: Research School of Earth Sciences, Australian National University
Scott M. McLennan: State University of New York at Stony Brook
Stuart Ross Taylor: Research School of Earth Sciences, Australian National University

Nature, 2009, vol. 459, issue 7246, E1-E1

Abstract: Abstract Arising from: J. M. D. Day et al. Nature 457, 179–182 (2009)10.1038/nature07651 ; Day et al. reply The production of terrestrial andesites in subduction zones is well established. Day et al.1 describe two examples of meteorites (GRA 06128 and GRA 06129) that they claim to represent “an entirely new mode of generation of andesite crust compositions” on asteroids; this suggestion has wide implications for the generation of andesitic planetary crusts in general. However, here we show that compositional data, particularly for the rare-earth elements (REEs) and other lithophile elements, presented in their paper1 do not substantiate this claim. We conclude that existing mechanisms for andesite generation do not need revision.

Date: 2009
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DOI: 10.1038/nature08077

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