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Title: Distinct evolution of the carbonaceous and non-carbonaceous reservoirs: Insights from Ru, Mo, and W isotopes

Journal Article · · Earth and Planetary Science Letters

Recent work has identified a nucleosynthetic isotope dichotomy between “carbonaceous” (CC) and “non-carbonaceous” (NC) meteorites. Here in this paper, we report new Ru isotope data for rare iron meteorite groups belonging to the NC and CC suites. We show that by studying the relative isotopic characteristics of Ru, Mo, and W in iron meteorites, it is possible to constrain the processes leading to the distinct isotope heterogeneities in both reservoirs. In NC meteorites, internally normalized, mass-independent isotope ratios of Mo and Ru are correlated, but those of Mo and W are not. In CC meteorites, Mo and W isotope ratios are correlated, but those of Mo and Ru are not; specifically, Mo isotopic compositions are variable and those of Ru are more restricted. The contrasting behaviors of Ru and W relative to Mo in the two reservoirs likely require processing of the presolar carriers under distinct redox conditions. This provides further evidence that NC and CC meteorites originated from spatially separated reservoirs that evolved under different prevailing conditions.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1529822
Report Number(s):
LLNL-JRNL-755889; 943143
Journal Information:
Earth and Planetary Science Letters, Vol. 521, Issue C; ISSN 0012-821X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Fingerprints of the Protosolar Cloud Collapse in the Solar System. II. Nucleosynthetic Anomalies in Meteorites journal October 2019


Figures / Tables (7)