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Showing 1 to 20 of 177 for “"REE"”.
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The Structure of Groups of Ree Type With Computer Calculations
Made available in DSpace on 2014-12-14T13:09:38Z (GMT). No. of bitstreams: 1 7820970.pdf: 791787 bytes, checksum: ff749390db675a1d179bde5894507150 (MD5) Previous issue date: 1978
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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
The Fraser Lakes Zone B U-Th-LREE deposit is 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 …
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The addition of a US Rare Earth Element (REE) supply-demand model improves the characterization and scope of the United States Department of Energy's effort to forecast US REE Supply and Demand
… the development of a new US Rare Earth Element (REE) Supply-Demand Model for the explicit forecast of US REE supply and demand in the 2010 to 2025 time period. In the 2010 Department of Energy (DOE) Critical Material Strategy (CMS) report, the DOE created a DOE REE Supply- Demand Model that …
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Recovery of rare earth elements (REE) from waste printed circuit boards (WPCBs) through heterotrophic bioleaching
Recovering rare earth elements (REE) from secondary sources, such as electronic waste (e-waste), is increasingly gaining attention as these elements are at high supply risk, and the environmental impacts of mining them are of concern. Global REE recycling rates remain below 1%. Waste printed …
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Modified crustal source for the Colorado mineral belt: implications for REE buffering in CO2-rich fluids, A
Includes bibliographical references.
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Mineralogical and ion-exchange leaching study of a Rare Earth Element (REE) bearing ion-adsorption clay deposit
Rare earth elements (REEs), La to Lu including Y, are vital elements in manufacture of catalysts and metallurgical industries, and play a critical role in meeting future energy demands, such as through their use in permanent magnets in wind turbines. China has dominated more than 90 % of the REE …
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CRYSTAL CHEMISTRY AND PHYSICAL-CHEMICAL BEHAVIOR OF REE-BEARING PHOSPHATES AND ARSENATES: THE CASE STUDY OF MT. CERVANDONE
… and xenotime-(Y) share a very similar (Y,HREE) composition and the same can be stated for the LREE content of the two monazite-type minerals [gasparite-(Ce) and monazite-(Ce)]. An almost complete solid solution has been found between xenotime-(Y) and chernovite-(Y), while a wide miscibility …
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Quantifying periods of diffusion in marine and nonmarine vertebrate fossils using rare earth elements
Concentrations of rare earth (REE), U, Th, and other trace elements (TE) were measured using LA-ICP-MS along transects across five Late Eocene brontothere bones from the terrestrial Late Eocene Chadron Formation of Nebraska and four Miocene marine mammals from the Atlantic Coastal Plain. Samples …
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Geochemistry of suspended particles in the Tamar estuary
ICP analyses of total rare earth element (REE) abundances in intertidal sediments and suspended particles from the Tamar Estuary show little variation in REE concentrations along the estuary and only minor fractionation relative to standard shale. Fe, Mn, Cu, Zn, Ni & Co abundances in the estuarine …
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Gradient ion chromatographic determination of rare earth elements in coal and fly ash
Rare Earth Element (REE) determination in samples of coal and fly ash was undertaken by gradient high performance ion chromatography (HPIC). Ion chromatographic analysis requires that samples be in solution and that the matrix transition metals be removed. Coal samples, weighing 0.20g, were …
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Characterisation of human metabolism in physiological and pathophysiological states
… a healthy population resting energy expenditure (REE) is highly influenced by body composition, specifically lean mass (LM). Prediction equations can therefore accurately predict REE from body composition in healthy individuals. However, application of these equations to clinical patients, in whom …
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Correlations between the Mineralogy and Recovery Behavior of Rare Earth Elements (REEs) in Coal Waste
… published recently regarding the recovery of REEs from coal-related materials, such as coal waste, acid mine drainage, and coal combustion ash. The recovery of REEs from coal waste has been investigated by the author in recent years, and it was found that after calcination at 600 ℃ for 2 h, a …
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Metabolism and Body Composition in Chronic Inflammatory Arthritis: Prevention and Intervention through Pharmaceutical and Physical Means
… by increased resting energy expenditure (REE) and loss of fat-free mass (FFM) leading to functional disability, decreased strength and balance. The aims of this research work was to: a) to develop a new REE equation in order to continuously monitor abnormal changes in REE in the RA …
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Separation, preconcentration and determination of rare earth elements by inductively coupled plasma emission spectroscopy
Rare earth elements, (REE), at ug g⁻¹ levels are used for studies of petrogenisis of different geological materials. For these studies, the REE must be determined precisely. An analytical program was established using an IL 200 Inductively Coupled Plasma, (ICP), spectrometer for the determination …
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Applying Garnet and Zircon REE Linkages to Determine Timing of P-T Conditions and Tectonic Implications for UHP Eclogites and HP Granulites, Dulan UHP Terrane, China
… This study, (1) evaluates rare earth element (REE) equilibrium between garnet and zircon, to assess coeval growth; (2) links timing (from zircon) to the P-T history (from garnet) to constrain the P-T-t path of the Dulan UHP terrane and interpret implications for zircon growth; (3) refines P-T …
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Geochemical Behavior of the Rare Earth Elements in Natural Terrestrial Waters
<p>This dissertation presents three manuscripts describing the following aspects of the geochemical behavior of REEs: (1) solution complexation of REEs with both inorganic and organic ligands in natural terrestrial waters; (2) the geochemical behavior of REEs along the groundwater flow paths in two …
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Low rare earth element concentration impact glass from the K/T Boundary at Beloc
… Beloc that is depleted in rare earth elements (REE) relative to continental crust. It is widely agreed that a large bolide struck the Yucatan Peninsula roughly 65 Ma spreading a worldwide iridium anomaly. However, there is only one case of a piece of the impactor being found (Kyte et al., 1995). …
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The marine geochemistry of the rare earth elements
… of 12 of the 14 Rare Earth Elements (REE) in seawater. Initial extractions of the REE by chelating ion exchange chromatography is followed by cation exchange for removal of co-extracted U and remaining traces of major ions. Finally traces of U are removed by anion exchange before …
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