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Uranium Isotope Variations in Nature: Mechanisms, Applications, and Implications

Abstract Historically, uranium has received intense study of its chemical and isotopic properties for use in the nuclear industry, but has been largely ignored by geoscientists despite properties that make it an intriguing target for geochemists and cosmochemists alike. Uranium was long thought to have an invariant 238U/235U ratio in natural samples, making it uninteresting for isotopic work. However, recent advances in mass spectrometry have made it possible to detect slight differences in the 238U/235U ratio, creating many exciting new opportunities for U isotopic research. Using uranium ore samples from diverse depositional settings from around the world, it is shown that the low-temperature redox transition of uranium (U6+ to U4+) causes measura... (more)
Created Date 2011
Contributor Brennecka, Gregory Adam (Author) / Anbar, Ariel D (Advisor) / Wadhwa, Meenakshi (Advisor) / Herrmann, Achim D (Committee member) / Hervig, Richard (Committee member) / Young, Patrick (Committee member) / Arizona State University (Publisher)
Subject Geochemistry / chronology / isotopes / paleoredox / uranium
Type Doctoral Dissertation
Extent 158 pages
Language English
Reuse Permissions All Rights Reserved
Note Ph.D. Geological Sciences 2011
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS

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Description Dissertation/Thesis