{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/18351"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/18351","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The isotope geochemistry of uranium: Igneous petrology, ore deposits, and groundwater contamination","abstract":"This study applies high precision 238U/235U measurement techniques two three geologic settings: basalt differentiation, uranium ore genesis, and the remediation of a uranium-contaminated groundwater system. In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal information on the development of an ore body (chapters 2 and 3) while analysis of 238U/235U in contaminated groundwater can be used to monitor the progress of uranium reduction (chapters 4 and 5). 238U/235U measurements are applied in a less orthodox way to the problems of magmatic differentiation, where 235U separates from 238U when a partially-molten basalt is allowed to equilibrate under a temperature gradient. This extends the previous work on the isotopic effects of thermal diffusion into the heavy elements, and presents new research on the mineralogical development of a basalt under a thermal gradient. There are five studies in this work: 238U/235U is first applied to detect the effect of a thermal gradient on a partially molten basalt, with variations of ≈1.0‰ found over ≈150°C. 238U/235U is then applied to the case of sedimentary reduced uranium ore deposits. A general survey of finds a shift of ≈1.0‰ between magmatic-type and sandstone-type uranium ores. A small-scale study of a uranium roll front deposit finds 238U/235U variation in excess of 1.0‰. In both cases, the shift in 238U/235U is attributed to the nuclear field shift effect during uranium reduction. 238U/235U analysis is then applied to a groundwater remediation setting at a biostimulation experiment at the former site of a uranium tailings pile in Rifle, Colorado. 238U/235U analysis of a bioremediation experiment finds a shift of ≈1.0‰ associated with a large (≈90%) decrease in dissolved uranium concentration. This shift is again attributed to the nuclear field shift effect during uranium reduction. Finally, 238U/235U analysis is used to trace the cause of an abnormal change in dissolved uranium concentration during a subsequent biostimulation experiment at the Rifle, Colorado site. By analyzing the sense and timing of shifts in 238U/235U relative to shifts in dissolved uranium concentration I am able to differentiate between uranium reoxidation, uranium desorption, and advection of uranium-bearing groundwater.","abstract_html":"This study applies high precision 238U/235U measurement techniques two three geologic settings: basalt differentiation, uranium ore genesis, and the remediation of a uranium-contaminated groundwater system. In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal information on the development of an ore body (chapters 2 and 3) while analysis of 238U/235U in contaminated groundwater can be used to monitor the progress of uranium reduction (chapters 4 and 5). 238U/235U measurements are applied in a less orthodox way to the problems of magmatic differentiation, where 235U separates from 238U when a partially-molten basalt is allowed to equilibrate under a temperature gradient. This extends the previous work on the isotopic effects of thermal diffusion into the heavy elements, and presents new research on the mineralogical development of a basalt under a thermal gradient. There are five studies in this work: 238U/235U is first applied to detect the effect of a thermal gradient on a partially molten basalt, with variations of ≈1.0‰ found over ≈150°C. 238U/235U is then applied to the case of sedimentary reduced uranium ore deposits. A general survey of finds a shift of ≈1.0‰ between magmatic-type and sandstone-type uranium ores. A small-scale study of a uranium roll front deposit finds 238U/235U variation in excess of 1.0‰. In both cases, the shift in 238U/235U is attributed to the nuclear field shift effect during uranium reduction. 238U/235U analysis is then applied to a groundwater remediation setting at a biostimulation experiment at the former site of a uranium tailings pile in Rifle, Colorado. 238U/235U analysis of a bioremediation experiment finds a shift of ≈1.0‰ associated with a large (≈90%) decrease in dissolved uranium concentration. This shift is again attributed to the nuclear field shift effect during uranium reduction. Finally, 238U/235U analysis is used to trace the cause of an abnormal change in dissolved uranium concentration during a subsequent biostimulation experiment at the Rifle, Colorado site. By analyzing the sense and timing of shifts in 238U/235U relative to shifts in dissolved uranium concentration I am able to differentiate between uranium reoxidation, uranium desorption, and advection of uranium-bearing groundwater.","abstract_has_math":false,"creators":["Bopp, Charles J., IV"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Geology","degree_department":null,"school":null,"contributors":["Lundstrom, Craig C.","Johnson, Thomas M.","Sanford, Robert A.","Marshak, Stephen"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-01-14T22:47:12Z","date_published":"2011-01-14T22:47:12Z","updated_at":"2026-07-22T22:25:11Z","subjects":["uranium","uranium isotopes","groundwater","groundwater contamination","groundwater remediation","mass spectrometry","thermal diffusion","thermal migration","uranium contamination","uranium remediation","bioremediation","uranium ore","roll front","uranium mining","uranium reduction","thermal migration zone refining","basalt"],"languages":["en"],"rights":["Copyright 2010 Charles John Bopp IV"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/18351","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lundstrom, Craig C.","Johnson, Thomas M.","Sanford, Robert A.","Marshak, Stephen"]},{"key":"dc:creator","label":"Author","values":["Bopp, Charles J., IV"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-01-14T22:47:12Z","2010-12"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["uranium","uranium isotopes","groundwater","groundwater contamination","groundwater remediation","mass spectrometry","thermal diffusion","thermal migration","uranium contamination","uranium remediation","bioremediation","uranium ore","roll front","uranium mining","uranium reduction","thermal migration zone refining","basalt"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2010 Charles John Bopp IV"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/18351"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This study applies high precision 238U/235U measurement techniques two three geologic settings: basalt differentiation, uranium ore genesis, and the remediation of a uranium-contaminated groundwater system. In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal information on the development of an ore body (chapters 2 and 3) while analysis of 238U/235U in contaminated groundwater can be used to monitor the progress of uranium reduction (chapters 4 and 5). 238U/235U measurements are applied in a less orthodox way to the problems of magmatic differentiation, where 235U separates from 238U when a partially-molten basalt is allowed to equilibrate under a temperature gradient. This extends the previous work on the isotopic effects of thermal diffusion into the heavy elements, and presents new research on the mineralogical development of a basalt under a thermal gradient. There are five studies in this work: 238U/235U is first applied to detect the effect of a thermal gradient on a partially molten basalt, with variations of ≈1.0‰ found over ≈150°C. 238U/235U is then applied to the case of sedimentary reduced uranium ore deposits. A general survey of finds a shift of ≈1.0‰ between magmatic-type and sandstone-type uranium ores. A small-scale study of a uranium roll front deposit finds 238U/235U variation in excess of 1.0‰. In both cases, the shift in 238U/235U is attributed to the nuclear field shift effect during uranium reduction. 238U/235U analysis is then applied to a groundwater remediation setting at a biostimulation experiment at the former site of a uranium tailings pile in Rifle, Colorado. 238U/235U analysis of a bioremediation experiment finds a shift of ≈1.0‰ associated with a large (≈90%) decrease in dissolved uranium concentration. This shift is again attributed to the nuclear field shift effect during uranium reduction. Finally, 238U/235U analysis is used to trace the cause of an abnormal change in dissolved uranium concentration during a subsequent biostimulation experiment at the Rifle, Colorado site. By analyzing the sense and timing of shifts in 238U/235U relative to shifts in dissolved uranium concentration I am able to differentiate between uranium reoxidation, uranium desorption, and advection of uranium-bearing groundwater.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-08-20T21:13:57Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Bopp_Charles.zip: 789012 bytes, checksum: e26f543c5940a4c507ad2796f5651adc (MD5) Bopp_Charles.pdf: 14696736 bytes, checksum: 2649ef036b6c06ab78f093dc17b73ea1 (MD5)","Made available in DSpace on 2011-01-14T22:47:12Z (GMT). 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In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal information on the development of an ore body (chapters 2 and 3) while analysis of 238U/235U in contaminated groundwater can be used to monitor the progress of uranium reduction (chapters 4 and 5). 238U/235U measurements are applied in a less orthodox way to the problems of magmatic differentiation, where 235U separates from 238U when a partially-molten basalt is allowed to equilibrate under a temperature gradient. This extends the previous work on the isotopic effects of thermal diffusion into the heavy elements, and presents new research on the mineralogical development of a basalt under a thermal gradient. There are five studies in this work: 238U/235U is first applied to detect the effect of a thermal gradient on a partially molten basalt, with variations of ≈1.0‰ found over ≈150°C. 238U/235U is then applied to the case of sedimentary reduced uranium ore deposits. A general survey of finds a shift of ≈1.0‰ between magmatic-type and sandstone-type uranium ores. A small-scale study of a uranium roll front deposit finds 238U/235U variation in excess of 1.0‰. In both cases, the shift in 238U/235U is attributed to the nuclear field shift effect during uranium reduction. 238U/235U analysis is then applied to a groundwater remediation setting at a biostimulation experiment at the former site of a uranium tailings pile in Rifle, Colorado. 238U/235U analysis of a bioremediation experiment finds a shift of ≈1.0‰ associated with a large (≈90%) decrease in dissolved uranium concentration. This shift is again attributed to the nuclear field shift effect during uranium reduction. Finally, 238U/235U analysis is used to trace the cause of an abnormal change in dissolved uranium concentration during a subsequent biostimulation experiment at the Rifle, Colorado site. By analyzing the sense and timing of shifts in 238U/235U relative to shifts in dissolved uranium concentration I am able to differentiate between uranium reoxidation, uranium desorption, and advection of uranium-bearing groundwater.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-08-20T21:13:57Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Bopp_Charles.zip: 789012 bytes, checksum: e26f543c5940a4c507ad2796f5651adc (MD5) Bopp_Charles.pdf: 14696736 bytes, checksum: 2649ef036b6c06ab78f093dc17b73ea1 (MD5)","Made available in DSpace on 2011-01-14T22:47:12Z (GMT). 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