Sandstone uranium deposits of Nebraska and Colorado: a comparative study
| dc.contributor.author | Meek, Angela | |
| dc.contributor.examiningcommittee | Chakhmouradian, Anton (Geological Sciences) Kotzer, Tom (Cameco) | en_US |
| dc.contributor.supervisor | Fayek, Mostafa (Geological Sciences) | en_US |
| dc.date.accessioned | 2014-06-26T13:15:15Z | |
| dc.date.available | 2014-06-26T13:15:15Z | |
| dc.date.issued | 2014-06-26 | |
| dc.degree.discipline | Geological Sciences | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Sandstone-type uranium deposits are among the most economic sources of uranium. Despite their significance, the tabular deposits on the Colorado Plateau and roll-front deposits in Nebraska have not been studied adequately. There are important differences between the tabular Colorado Plateau and Nebraska roll-front deposits, including their ore mineralogy, distribution and habit of ore-bodies, alteration, and mechanisms of ore deposition. The U-Pb ages of uranium minerals from the Colorado deposits indicate four stages of mineralization, spanning from the early Oligocene to late Pliocene. Uranium and V minerals include coffinite, montroseite and carnotite and are associated with both biogenic and non-biogenically precipitated sulphides. Two generations of coffinite mineralization from the Three Crow roll-front deposit in Nebraska were identified. This mineralization precipitated during the early Pliocene and late Miocene. The U-Th activity ratios of U minerals suggest a net accumulation of uranium within the limbs of the roll-front. Evolving oxidation fronts are implied by multiple sulphide generations as indicated by their delta 34S compositions. | en_US |
| dc.description.note | October 2014 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/23662 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | uranium | en_US |
| dc.subject | sandstone | en_US |
| dc.title | Sandstone uranium deposits of Nebraska and Colorado: a comparative study | en_US |
| dc.type | master thesis | en_US |