Silicon isotopic measurements of amoeboid olivine aggregates in chondritic meteorites, representing the oldest known solid material in the Solar System, revealed large light silicon isotope enrichments consistent with condensation from the gaseous protoplanetary disk occurring over timescales of days or weeks, much faster than the expected cooling time of the disk, suggesting that these solids first formed during local temperature fluctuations within the disk.
Article #19-12479: "Rapid condensation of the first Solar System solids," by Yves Marrocchi, Johan Villeneuve, Emmanuel Jacquet, Maxime Piralla, and Marc Chaussidon.
MEDIA CONTACT: Yves Marrocchi, Centre de Recherches Pétrographiques et Géochimiques, Centre national de la recherche scientifique, Vandoeuvre-lès-Nancy, FRANCE; tel: +33-383594245; e-mail: yvesm@crpg.cnrs-nancy.fr
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Proceedings of the National Academy of Sciences