Universität zu Köln

Worsham, Emily A., Burkhardt, Christoph, Budde, Gerrit ORCID: 0000-0003-0762-779X, Fischer-Goedde, Mario, Kruijer, Thomas S. and Kleine, Thorsten (2019). Distinct evolution of the carbonaceous and non-carbonaceous reservoirs: Insights from Ru, Mo, and W isotopes. Earth Planet. Sci. Lett., 521. S. 103 - 113. AMSTERDAM: ELSEVIER. ISSN 1385-013X

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Abstract

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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Worsham, Emily A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Burkhardt, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Budde, Gerrit UNSPECIFIED orcid.org/0000-0003-0762-779X UNSPECIFIED Fischer-Goedde, Mario UNSPECIFIED UNSPECIFIED UNSPECIFIED Kruijer, Thomas S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kleine, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-143673
DOI:	10.1016/j.epsl.2019.06.001
Journal or Publication Title:	Earth Planet. Sci. Lett.
Volume:	521
Page Range:	S. 103 - 113
Date:	2019
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1385-013X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOLAR NEBULA; IRON-METEORITES; NEUTRON-CAPTURE; SILICON-CARBIDE; CORE FORMATION; MOLYBDENUM; ANOMALIES; ORIGIN; HETEROGENEITY; SYSTEM Multiple languages Geochemistry & Geophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14367