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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"uranium deposits"”.
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Remote sensing applied to exploration for vein-type uranium deposits, Front Range, Colorado
Includes bibliographical references (pages 142-158).
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The geology and geochemistry of the Lumwana Basement hosted copper-cobalt (uranium) deposits, NW Zambia
The Lumwana Cu±Co deposits Malundwe and Chimiwungo are examples of pre-Katangan mineralized basement that are located in the Domes Region of the Lufilian Arc, an arcuate North neo-Proterozoic fold belt, which hosts the Zambian and Congolese deposits that make up the Central African Copperbelt. The …
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Fluid Evolution and Structural Control on Uranium Deposits in Successor Basins in Northern Canada and Northern Australia
Uranium deposits associated with Paleoproterozoic successor basins were investigated using structural, petrographic, geochronological and geochemical relationships to understand the character and timing of ore-forming fluids and the structural control on uranium mineralization. The work focused on …
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The source of uranium and vanadium at the Langer Heinrich and Klein Trekkopje uranium deposits-genesis and controlling factors for uranium mineralization, Western Namibia.
The Langer Heinrich and Klein Trekkopje U deposits are located within the Namib Desert in Central Namibia. Both deposits are hosted by calcretes developed within palaeo-channel systems of Tertiary age. The sources of both U and V in the two deposits and the reasons why the two deposits differ in …
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URANYL DEPOSITION IN UNCONFORMITY-RELATED DEPOSITS IN THE ATHABASCA BASIN: EVIDENCE FROM URANIUM SPECIATION IN HEMATITE AND GOETHITE
… conditions, genetic models for the formation of uranium deposits had almost invariably invoked the pivotal roles of soluble U6+ species for the transport of uranium-bearing fluids and their reduction to sparingly soluble U4+ as the deposition mechanism. However, the questions of when and how this …
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Spatial and Temporal Variations in Composition and P-T Conditions of Ore-Forming Fluids Along Structures Controlling Unconformity-Related Uranium Deposits in the Athatbasca Basin, Saskatchewan
Unconformity-related uranium (URU) deposits in the Athabasca Basin occur within certain segments of basement-rooted reverse faults near the basin-basement unconformity. It is widely accepted that these deposits formed through interaction between oxidized basinal fluids and reduced basement-derived …
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Geometric and hydrodynamic modelling of fluid-structural relationships in the southeastern Athabasca Basin, Saskatchewan, Canada, with implications for uranium ore genesis
The high-grade unconformity-related uranium deposits in the Athabasca Basin in northern Saskatchewan, Canada, generally show close spatial relationships with reactivated basement faults. However, the nature of this relationship has not been well understood. This thesis aims to address this problem …
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Graphite-bearing and graphite-depleted basement rocks in the Dufferin Lake Zone, south-central Athabasca Basin, Saskatchewan
Unconformity-type uranium deposits from the Athabasca Basin are considered to be the result of mixing between oxidized basinal brines and basement-derived reduced fluids/gases, and/or reduced basement rocks. Graphite and/or its breakdown products are suggested to be responsible for uranium …
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Lithostratigraphic and structural controls of uranium mineralization in the Kiggavik East Zone, Centre Zone, and Main Zone deposits, Thelon Basin, Nunavut
The Kiggavik uranium deposits are located in the north-central Rae Subprovince of the Western Churchill Province and are hosted in highly deformed Archean and Paleoproterozoic basement rocks proximal to, and underlying the Thelon Basin. This field-based study documents the lithostratigraphic and …
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Structural Style and Regional Comparison of the Paleoproterozoic Ketyet River Group in the Region North-Northwest of Baker Lake, Nunavut
… Lake”, “Bar Lake” and Kiggavik, north of the uranium deposits. This improves knowledge of the basement rocks marginal to the late Paleoproterozoic Thelon Basin for unconformity-related uranium exploration. In 2010 and 2011, detailed mapping in the first three areas revealed that the Ketyet …
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Groundwater flow, hydrochemistry, and uranium deposition in the Powder River Basin, Wyoming
… regional groundwater flow, hydrochemistry, and uranium distribution in the Powder River Basin indicates that uranium was deposited during the Tertiary Period in groundwater recharge areas where the groundwater changed from a sulfate-bicarbonate water to a bicarbonate-rich water. </p><p>The …
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From the lab to the real world : sources of error in UF6 gas enrichment monitoring
Safeguarding uranium enrichment facilities is a serious concern for the International Atomic Energy Agency (IAEA). Safeguards methods have changed over the years, most recently switching to an improved safeguards model that calls for new technologies to help keep up with the increasing size and …
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The Fraser Lakes Zone B U-Th-REE deposit and its host rocks : implications for pegmatite- and leucogranite-hosted U-Th-REE deposits in northern Saskatchewan, Canada
… located approximately 50 km SE of the Key Lake uranium mine in the Wollaston Domain of Northern Saskatchewan, Canada. Here, a number of variably radioactive pegmatites and leucogranites intruded the highly sheared, unconformable contact between Paleoproterozoic Wollaston Group metasedimentary …
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The partitioning and mobility of metals in the Blesbokspruit
… East Rand, famous for its prolific gold and uranium deposits. With the onset of mining in the region around 1930, the Blesbokspruit was altered from a non-perennial to a perennial stream and a wetland due to the construction of roads and embankments as well as the discharge of mine effluent. …
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Geochemical Flow Modeling
… to the mineralogy of the formation. In an uranium leaching application, the model was used to study both acid leaching using ferric sulfate solutions and alkaline leaching using carbonate solutions. For acid leaching. simulations revealed that the pyrite dissolution kinetics and potential …
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Life Cycle Analysis of Greenhouse Gas Emissions from the Mining and Milling of Uranium in Saskatchewan
… gas (GHG) emissions intensity during the uranium mining-milling phase of the nuclear fuel cycle for three paired uranium mine-mill operations in northern Saskatchewan (SK). The study period runs from 2006 – 2013 for two of the three pairs, and from 1995-2010 for the third. The life cycle …
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History of the fluids associated with the lode-gold deposits, and complex U-PGE-Au vein-type deposits, Goldfields Peninsula, Northern Saskatchewan, Canada
… complex and protracted fluid history. All of the deposits studied are physically hosted in a variably metamorphosed sedimentary sequence, the Aphebian-aged Murmac Bay Group (complex Au-PGE-U vein-type deposits, e.g. Nicholson, Fish Hook), or within granites "intrusive" into the Group (lode-gold …
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A Study of Petrography, Fluid Inclusions and Graphite Alteration of the Phoenix Uranium Deposit, Athabasca Basin, Northern Saskatchewan, Canada
The Phoenix unconformity-related uranium (URU) deposit, located in the southeastern Athabasca Basin, is associated with a NE-trending, moderately SE-dipping reverse fault crosscutting the unconformity between the Proterozoic Athabasca Group and the Archean – Paleoproterozoic basement. The …
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Britain's exploitation of Occupied Germany for scientific and technical intelligence on the Soviet Union
… it allowed research and development projects and uranium.-mining operations there to be penetrated. Intelligence of Soviet weapons development and of the quality of Soviet military technology was obtained. The mass interrogation of prisoners-of-war returned by the Soviets to the British Occupation …
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Petrographic, Fluid Inclusion, and Illite Geothermometry Analysis of the Rumpel Lake Drill Core, Athabasca Basin, Northern Saskatchewan, Canada
… the world’s highest-grade unconformity-related uranium deposits, the genesis of which has been extensively explored in the literature. Constraints on the temperature, pressure, and composition of diagenetic fluids within the Athabasca Basin have mainly come from research conducted in …
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