Tetravalent Uranium in Calcite-Reference-Cited by-同舟云学术

Tetravalent Uranium in Calcite

Published:1998-08-14 Issue:5379 Volume:281 Page:971-973
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Sturchio N. C.¹,Antonio M. R.¹,Soderholm L.¹,Sutton S. R.¹,Brannon J. C.¹

Affiliation:

1. N. C. Sturchio, M. R. Antonio, L. Soderholm, Argonne National Laboratory, Argonne, IL 60439, USA. S. R. Sutton, Consortium for Advanced Radiation Sources and Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA. J. C. Brannon, Department of Earth and Planetary Sciences, Washington University, St. Louis, MO 63130, USA.

Abstract

X-ray absorption spectroscopy and x-ray fluorescence microprobe studies of 35-million-year-old calcite from a Mississippi Valley–type zinc ore deposit indicate substitution of tetravalent uranium for divalent calcium. Thus, tetravalent uranium has a stable location in calcite deposited under reducing conditions. This result validates uranium-series dating methods (including uranium/lead dating) for ancient calcite and shows that calcite provides a sink for uranium in deep groundwater aquifers and anoxic lacustrine and marine basins.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference32 articles.

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