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dc.contributor.supervisor Fayek, Mostafa (Geological Sciences) en_US
dc.contributor.author Bergen, Laura
dc.date.accessioned 2013-01-09T17:30:38Z
dc.date.available 2013-01-09T17:30:38Z
dc.date.issued 2012 en_US
dc.identifier.citation Bergen and Fayek, 2012 en_US
dc.identifier.uri http://hdl.handle.net/1993/14431
dc.description.abstract The behavior of U in near surface sedimentary environments has changed throughout geologic time. There is a marked shift in U (IV) mineral stability and deposit style at approximately 2200 Ma due to changes in the concentration of O in the atmosphere. For example, prior to 2200 Ma, fluvial U deposits could form and U(IV) were stable in surface and near-surface environments. In modern, anthropogenic sedimentary systems such as U tailings, U (IV) minerals are not stable and readily oxidize to U (VI) minerals. In addition, U is much more mobile in modern sediments relative sediments that were deposited prior to 2200 Ma. en_US
dc.publisher American Mineralogist en_US
dc.subject uranium en_US
dc.subject geochemistry en_US
dc.subject environment en_US
dc.subject geochronology en_US
dc.subject tailings en_US
dc.title Uranium in the environment: a characterization and comparison of uranium mobility in ancient and modern sediments en_US
dc.degree.discipline Geological Sciences en_US
dc.contributor.examiningcommittee Sherriff, Barbara (Geological Sciences) Schreckenbach, Georg (Chemistry) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note February 2013 en_US


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