Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 521, Issue -, Pages 103-112Publisher
ELSEVIER
DOI: 10.1016/j.epsl.2019.06.001
Keywords
molybdenum; ruthenium; tungsten; nucleosynthetic heterogeneity; meteorite dichotomy; thermal processing
Categories
Funding
- Deutsche Forschungsgemeinschaft as part of the Collaborative Research Centre [TRR 170]
Ask authors/readers for more resources
Recent work has identified a nucleosynthetic isotope dichotomy between carbonaceous (CC) and non-carbonaceous (NC) meteorites. Here, 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. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available