Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Pristine extraterrestrial material with unprecedented nitrogen isotopic variation

Abstract : Pristine meteoritic materials carry light element isotopic fractionations that constrain physiochemical conditions during solar system formation. Here we report the discovery of a unique xenolith in the metal-rich chondrite Isheyevo. Its fine-grained, highly pristine mineralogy has similarity with interplanetary dust particles (IDPs), but the volume of the xenolith is more than 30,000 times that of a typical IDP. Furthermore, an extreme continuum of N isotopic variation is present in this xenolith: from very light N isotopic composition (δ15NAIR = −310 ± 20‰), similar to that inferred for the solar nebula, to the heaviest ratios measured in any solar system material (δ15NAIR = 4,900 ± 300‰). At the same time, its hydrogen and carbon isotopic compositions exhibit very little variation. This object poses serious challenges for existing models for the origin of light element isotopic anomalies.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-00367907
Contributor : Béatrice Pibaret-Bourdon Connect in order to contact the contributor
Submitted on : Thursday, March 12, 2009 - 5:17:14 PM
Last modification on : Wednesday, June 15, 2022 - 4:20:24 AM

Links full text

Identifiers

Collections

INSU | UGA | CNRS | OSUG

Citation

Giacomo Briani, Matthieu Gounelle, yves Marrocchi, Smail Mostefaoui, Hugues Leroux, et al.. Pristine extraterrestrial material with unprecedented nitrogen isotopic variation. Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2009, 106 (26), pp.10522-10527. ⟨10.1073/pnas.0901546106⟩. ⟨insu-00367907⟩

Share

Metrics

Record views

84