The Open UniversitySkip to content

Nucleosynthetic zirconium isotope anomalies in acid leachates of carbonaceous chondrites

Schönbächler, Maria; Rehkämper, Mark; Fehr, Manuela A.; Halliday, Alex N.; Hattendorf, Bobo and Günther, Detlef (2005). Nucleosynthetic zirconium isotope anomalies in acid leachates of carbonaceous chondrites. Geochimica et Cosmochimica Acta, 69(21) pp. 5113–5122.

DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


Stepwise dissolutions of the carbonaceous chondrites Orgueil (CI), Murchison (CM) and Allende (CV) reveal large nucleosynthetic anomalies for Zr isotopes that contrast with the uniform compositions found in bulk meteorites. Two complementary nucleosynthetic components are observed: one enriched and one depleted in s-process nuclides. The latter component, characterized by excess 96Zr, is most distinctive in the acetic acid leachate (up to ε 96Zr ≈ 50). The excess decreases with increasing acid strength and the final leaching steps of the experiment are depleted in 96Zr and thus enriched in s-process nuclides. Presolar silicon carbide grains are likely host phases for part of the anomalous Zr released during these later stages. However, by mass balance they cannot account for the 96Zr excesses observed in the early leaching steps and this therefore hints at the presence of at least one additional carrier phase with significant amounts of anomalous Zr. The data provide evidence that average solar system material consists of a homogenized mixture of different nucleosynthetic components, which can be partly resolved by leaching experiments of carbonaceous chondrites.

Item Type: Journal Item
Copyright Holders: 2005 Elsevier Ltd
ISSN: 0016-7037
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetSwiss National Science Foundation
Not SetNot SetETH
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 25125
Depositing User: Manuela Fehr
Date Deposited: 07 Apr 2011 14:25
Last Modified: 02 May 2018 13:21
Share this page:


Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU