title: Early scattering of the solar protoplanetary disk recorded in meteoritic chondrules.
abstract: Meteoritic chondrules are submillimeter spherules representing the major constituent of nondifferentiated planetesimals formed in the solar protoplanetary disk. The link between the dynamics of the disk and the origin of chondrules remains enigmatic. Collisions between planetesimals formed at different heliocentric distances were frequent early in the evolution of the disk. We show that the presence, in some chondrules, of previously unrecognized magnetites of magmatic origin implies the formation of these chondrules under impact-generated oxidizing conditions. The three oxygen isotopes systematic of magmatic magnetites and silicates can only be explained by invoking an impact between silicate-rich and ice-rich planetesimals. This suggests that these peculiar chondrules are by-products of the early mixing in the disk of populations of planetesimals from the inner and outer solar system.
authors.affiliation: Centre de Recherches Pétrographiques et Géochimiques, CNRS, Université de Lorraine, UMR 7358, 54501 Vandoeuvre-lès-Nancy, France.
authors.forename: Yves
authors.initials: Y
authors.lastname: Marrocchi
authors.affiliation: Institut de Physique du Globe de Paris, Université Sorbonne Paris Cité, 75238 Paris, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Chaussidon
authors.affiliation: Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: Laurette
authors.identifier: 0000-0003-0854-7468
authors.initials: L
authors.lastname: Piani
authors.affiliation: Observatoire de la Côte d'Azur, CS 34229, 06304 Nice, France.
authors.forename: Guy
authors.initials: G
authors.lastname: Libourel
mesh_terms: D008280:Magnetics; D019110:Meteoroids; D010103:Oxygen Isotopes / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D016082:Solar System; D013440:Sulfides / Q000737:chemistry; D013460:Sulfur Isotopes / Q000737:chemistry
chemical_list: D010103:Oxygen Isotopes; D017640:Silicates; D013440:Sulfides; D013460:Sulfur Isotopes