¹Wang, Y.-C.,^1,2Liu, Y.-X.,³Jiang, T.,¹Chen, K.-L.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis 39, 3154-3158 Link to Article [DOI: 10.3964/j.issn.1000-0593(2019)10-3154-05]
¹Institute of History of Metallurgy and Materials, University of Science and Technology Beijing, Beijing, 100083, China
²UCL Institute of Archaeology, London, WC1H0PY, United Kingdom
³Henan Provincial Institute of Archaeology and Cultural Relics, Zhengzhou, 450000, China

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¹Abdu, Y.A.
Journal of Physics: Conference Series 1258, 01230 Link to Article [DOI
https://doi.org/10.1088/1742-6596/1258/1/012030]
¹Department of Applied Physics and Astronomy, University of Sharjah, P.O. Box 27272, United Arab Emirates

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¹Sutton, S.R.,¹Lanzirotti, A.,¹Newville, M.,^2,3Dyar, M.D.,⁴Delaney, J.
Chemical Geology 531, 119305 Link to Article [DOI: 10.1016/j.chemgeo.2019.119305]
¹U. Chicago, IL, United States
²Planetary Science Institute, AZ, United States
³Mount Holyoke College, MA, United States
⁴Rutgers U., NJ, United States

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^1,2Bo-Magnus Elfers,^1,2,3Sprung Peter,^1,2 Messling Nils,^1,2Münker Carsten
Geochimica et Cosmochimica Acta (in Press) Link to Article [https://doi.org/10.1016/j.gca.2019.12.008]
¹Institut für Geologie und Mineralogie, Universität zu Köln, Zülpicherstr. 49b, 50674 Cologne, Germany
²Steinmann-Institut, Rheinische Friedrich-Wilhelms-Universität Bonn, Poppelsdorfer Schloss, Meckenheimer Allee 169, 53115 Bonn, Germany
³Analytic Radioactive Materials, Hot Laboratory Division, Paul Scherrer Institute, 5232 Villigen, Switzerland
Copyright Elsevier

The stepwise acid digestion of primitive chondritic meteorites allows the identification of nucleosynthetic isotope anomalies that are otherwise hidden on the bulk rock scale. Here, we present for the first time combined isotope data for acid leachates, residues, and bulk rock aliquots of several primitive chondrites for the geo- and cosmochemically similar elements Zr and Hf. Our analyses reveal significant Zr and Hf isotope anomalies that (i) are complementary between acid leachates and residues and (ii) well-correlated with each other. The observed Zr and Hf anomalies strongly suggest variable contributions of common s-process carrier phases to the different leachates and residues. Ratios of r- (and p-process) Zr and Hf isotopes appear to be uniform in leachates and residues. In contrast to the well-correlated anomalies found in our leaching experiments, nucleosynthetic Zr and Hf isotope signatures seem to be decoupled on the bulk rock scale. This contrast may result from the heterogeneous distribution of neutron-rich Zr material devoid Hf, or alternatively be caused by the presence of anomalous CAI material which overprinted s-process deficits that were initially correlated.

In contrast to a previous study, we find no direct evidence for the presence of a third isotopically distinct nucleosynthetic Zr component.