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Dissertations / Theses on the topic 'Rare earth element'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mitra, Arabinda. "Rare earth element systematics of submarine hydrothermal fluids and plumes." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386339.

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2

Wells, Deborah Mary. "Rare earth element systematics in ancient and modern hydrothermal systems." Thesis, University of Southampton, 1998. https://eprints.soton.ac.uk/42176/.

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The geochemical significance of on-axis diffuse fluids, in addition to those formed during the waning phases of hydrothermal systems and off-axis crustal ageing processes, has been investigated through a comparison of the rare earth element (REE) systematics of hydrothermal materials from the ore-forming hydrothermal systems of the TAG vent field, 26 N Mid-Atlantic Ridge, and 90 Myr Troodos Ophiolite, Cyprus. Ophiolites integrate a long (c. 20 Myr) history of seafloor alteration, which reflects both , axial and off-axis hydrothermal processes. Spatially-resolved laser ablation inductively coup

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3

Ireland, Terry G. "Precipitation techniques and characterisation of rare earth element doped phosphor materials." Thesis, University of Greenwich, 2008. http://gala.gre.ac.uk/6195/.

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The work in this thesis had two main aims. The first aim was to study the use of a number of precipitation methods to control the size and morphology of precursor phosphor materials for potential applications in a new generation of high definition and field emission displays. The morphological and luminescent characteristics of these precursor phosphor materials were studied after they were annealed to form their respective luminescent oxides using electron microscopy and light measuring techniques. The first set of experiments presented describes the development of a range of spherical submic

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4

Dukes, David. "Quantifying Post-Fire Aeolian Sediment Transport Using Rare Earth Element Tracers." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/450192.

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Geology<br>M.S.<br>Grasslands provide fundamental ecosystem services in many arid and semi-arid regions of the world, but are experiencing rapid increases in fire activity making them highly susceptible to post-fire accelerated soil erosion by wind. A quantitative assessment that integrates fire-wind erosion feedbacks is therefore needed to account for vegetation change, soil biogeochemical cycling, air quality, and landscape evolution. We investigated the applicability of a novel tracer technique – the use of multiple rare earth elements (REE) - to quantify aeolian soil erosion and to identif

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5

Van, Westrenen Willem. "Thermodynamics of garnet - melt trace element partitioning." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310693.

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6

Moore, Meghan. "Carbonatite-related rare-earth mineralization in the Bear Lodge alkaline complex, Wyoming: Paragenesis, geochemical and isotopic characteristics." ElSevier, 2014. http://hdl.handle.net/1993/23991.

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The Bear Lodge alkaline complex in northeastern Wyoming (USA) is host to potentially economic rare-earth mineralization in carbonatite and carbonatite-related veins and dikes that intrude heterolithic diatreme breccias in the Bull Hill area of the Bear Lodge Mountains. The deposit is zoned and consists of pervasively oxidized material at and near the surface, which passes through a thin transitional zone at a depth of ~120-183m, and grades into unaltered carbonatites at depths greater than ~183-190m. Carbonatites in the unoxidized zone consist of coarse and fine-grained calcite that is Sr-, Mn

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7

Burger, William. "Spatial Analysis of Post-Fire Sediment Redistribution Using Rare Earth Element Tracers." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/589658.

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Geology<br>M.S.<br>Many grasslands in arid and semi-arid regions are undergoing rapid changes in vegetation, including encroachment of woody plants and invasive grasses, which can alter the rates and patterns of fire and sediment transport in these landscapes. We investigated the spatial distribution of sediments at the scale of vegetated microsites for three years following a prescribed fire using a multiple rare earth element (REE) tracer-based approach in a shrub-grass transition zone in the northern Chihuahuan desert (New Mexico, USA). To this end, we applied REE tracers – holmium, europiu

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8

Ashby, Elizabeth. "Biogeochemical Mechanisms of Rare Earth Element Enrichment in Mining-affected Aqueous Environments." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36749.

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One of the largest environmental liabilities facing the Canadian and international mining industry includes the effects of acidic drainage to water resources. This thesis sought to determine biogeochemical mechanisms of rare earth element and yttrium (REY) enrichment in mine drainage, linkages between REYs and microbial populations, and whether REYs were present in water or biofilm at mineable quantities or toxic levels. Water and co-occurring biofilm samples were collected from North and South American mining and control sites, and a passive water treatment system in Pennsylvania. REY concent

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9

Quinn, Kelly Ann. "Influence of solution and surface chemistry on yttrium and rare earth element sorption." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001672.

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10

McMorrow, D. F. "Crystal fields and hyperfine interactions in holmium compounds." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377728.

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11

Fantone, Dennis W. "Low rare earth element concentration impact glass from the K/T Boundary at Beloc." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/117445.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, February 2011.<br>Cataloged from PDF version of thesis. "December 20, 2010." "This thesis was submitted to the Institute Archives without all the required signatures"--Disclaimer Notice page.<br>Includes bibliographical references (pages 33-34).<br>This paper seeks to describe an impact glass from the K/T boundary layer at 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 M

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12

Turner, David James. "Reflectance spectroscopy and imaging spectroscopy of rare earth element-bearing mineral and rock samples." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52954.

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A significant knowledge gap between the fields of reflectance spectroscopy and rare earth element (REE) mineralogy prompted this research effort. It narrows the knowledge gap through detailed study of thirty three samples representing three important mineral classes: REE fluorocarbonates (bastnaesite, synchysite, and parisite), REE phosphates (monazite, xenotime, and britholite), and REE-bearing silicates (cerite, mosandrite, kainosite, zircon and eudialyte). Reflectance spectroscopy was carried out in the visible to short wave infrared regions (500 nm to 2500 nm) and each sample was character

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13

Brown, TJ. "Geology & Geochemistry of the Kingman Feldspar, Rare Metals and Wagon Bow Pegmatites." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1280.

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In the Mojave Pegmatite district, located in northwestern AZ, numerous pegmatites intrude syn- to post-collisional Paleoproterozoic granitic rocks. The slightly older Cerbat plutons are associated with the suturing of the Mojave and Yavapai terranes whereas Aquarius granites were emplaced during the Yavapai Orogeny as the sutured terranes docked with North America. A detailed study of 5 pegmatites shows that they are zoned with composite cores and contain REE minerals characteristic of NYF pegmatites. However, they exhibit characteristics atypical for NYF pegmatites including F depletion, whit

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14

Crowther, Helen Louise. "A rare earth element and transition metal isotope study of the Irish Zn-Pb ore field." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445890.

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15

Holloway, Matthew. "Experimental study of REE carbonate and fluorocarbonate synthesis as a basis for understanding hydrothermal REE mineralisation." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31162.

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Many of the world's economic rare earth element (REE) deposits are formed from, or have been subsequently upgraded by, hydrothermal fluids. Some of the most important REE minerals are the light REE (LREE) enriched fluorocarbonates and carbonates, which are commonly found in carbonatites. Textural and mineralogical evidence from these and other sites point towards wall rock composition as a major control on the observed REE mineralisation, with the supply of carbonate, and possibly fluoride, thought to be the limiting factor. Despite theoretical and experimental studies focussed on REE speciati

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16

Gao, Yuan. "Design of rare-earth-doped inorganic phosphors and luminescence enhancement by plasmonic effects." Kyoto University, 2020. http://hdl.handle.net/2433/253288.

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17

Friedrichs, Patrick Verfasser], Franz Michael [Akademischer Betreuer] Meyer, and Hermann [Akademischer Betreuer] [Wotruba. "Development of a rare earth element resource database management system / Patrick Friedrichs ; Franz Michael Meyer, Hermann Wotruba." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162498188/34.

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18

Wang, Jianfeng. "A study of rare earth element substituted strontium hexaferrite produced by chemical co-precipitation and hydrothermal synthesis." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288888.

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Hexaferrites are still a very important component of the permanent magnets market because of their low price combined with reasonably attractive magnetic properties. In such a context, any improvement of the magnet data would be of great importance. In recent years, work has been carried out on improving the magnetic properties by a combined substitution of La and Co into the Sr-ferrite composition. This improvement was largely associated with an increase of coercivity and the underlying magneto-crystalline anisotropy. The possibility of replacing Sr by La and the subsequent improvement of the

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19

Burcher-Jones, Cody Owen. "Mineralogical and ion-exchange leaching study of a Rare Earth Element (REE) bearing ion-adsorption clay deposit." Master's thesis, Faculty of Engineering and the Built Environment, 2018. http://hdl.handle.net/11427/30161.

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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 market, with heavy REE (HREE) clay deposits in South China accounting for 35 % of their total REE output. This has prompted the evaluation of ion-adsorption clay (IAC) deposits in tropical regions outside China, namely Madagascar. Clay minerals such as kaolinite are part of the phyllosilicate class, co

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20

Friedrichs, Patrick [Verfasser], Franz Michael Akademischer Betreuer] Meyer, and Hermann [Akademischer Betreuer] [Wotruba. "Development of a rare earth element resource database management system / Patrick Friedrichs ; Franz Michael Meyer, Hermann Wotruba." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162498188/34.

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21

Liu, Chang. "Phytostabilization of ion-adsorption rare earth element mine tailings using the fiber plant ramie (Boehmeria nivea L.)." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0341.

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Les gisements à argiles ioniques sont l’une des principales sources mondiales de REEs lourdes (HREEs). Leur exploitation a engendré de vastes surfaces de stériles miniers, qui sont une menace sérieuse pour l'environnement et la santé des populations voisines. La restauration des écosystèmes nécessite des solutions efficaces et adaptées à de telles surfaces. La phytostabilisation repose sur l’installation de plantes avec ou sans amendement et, en général, utilise des plantes tolérantes. Mais des plantes à intérêt économique peuvent être envisagées. La ramie est une plante vivace qui produit des

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22

Moorehead, Anthony J. "IGNEOUS INTRUSIONS AT HICKS DOME, SOUTHERN ILLINOIS, AND THEIR RELATIONSHIP TO FLUORINE-BASE METAL-RARE EARTH ELEMENT MINERALIZATION." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1240.

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Hicks Dome is a mineralized intrusive center of alkaline ultramafic dikes, plugs and diatreme breccias that produced ~1200 m of structural doming of Paleozoic sedimentary rocks in southeastern Illinois. It is part of an igneous province referred to as the "Wauboukigou Alnöite Province" or "Middle Mississippi Alkaline Province". The 40Ar/39Ar dating of biotite and hornblende from igneous rocks throughout the region has consistently produced crystallization ages of 270 +/- 2 Ma (Early-Middle Permian). Hicks Dome lies near the intersection of two aulacogens, the Reelfoot Rift and the Rough Creek

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23

Xu, Guochang. "Substance flow analysis of rare earth elements and precious metals from end-of-life vehicles including next-generation vehicles." Kyoto University, 2019. http://hdl.handle.net/2433/243311.

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24

Bergbower, Joshua N. "Trace and Rare Earth Element Chemistry of Fluorite from the Illinois-Kentucky Fluorspar District and its Implications for the Origins of Mineralizing Fluids." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530269153862162.

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25

Fröllje, Henning [Verfasser], Katharina [Akademischer Betreuer] Pahnke, and Thorsten [Akademischer Betreuer] Dittmar. "Rare earth element and neodymium isotope tracing of element input and past ocean circulation: study from North and South Pacific seawater and sediments / Henning Fröllje ; Katharina Pahnke, Thorsten Dittmar." Oldenburg : BIS der Universität Oldenburg, 2016. http://d-nb.info/1116604124/34.

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26

Dodd, Zachary Caleb. "Petrogenesis and rare earth element economic potential of Pilot Knob, a Pliocene (?) alkaline intrusive complex in the Togwotee Pass region, northwestern Wyoming (U.S.A)." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20380.

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Master of Science<br>Geology<br>Matthew E. Brueseke<br>Previous K-Ar dating and petrography (Obradovich, 1978) have identified Pilot Knob as an ~3.4 (±0.06) Ma alkaline intrusive body. Bulk rock geochemistry obtained via XRF from four samples of Pilot Knob verifies the transitionally alkaline composition of the body, and new REE data also show enriched La, Ce, and Nd concentrations, consistent with rare earth element (REE) enrichment. Given the increased demand for REEs over the past ~30 years and China accounting for > 90% of global REE production (Kynicky, et al. 2012), it is important to

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27

Langley, Tracey Annette. "Studies of mixed oxides." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365837.

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28

Wei, Jingxian. "Reconstruction of palaeoenvironmental changes and the response of the Great Barrier Reef (GBR) ecosystem since 30,000 BP: implications from REY (rare earth elements and yttrium) and element ratios of reef-building carbonates." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25980.

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Our understanding of the development of the Great Barrier Reef (GBR) in response to sediment inputs over the past 30 ka is limited. Geochemical proxies including rare earth elements and yttrium (REY) along with element ratios (Pr/Yb, Y/Ho, Mn/Ca, Nd/Yb and Ce anomalies) are known to be closely related to sediment and nutrient input. This research conducts novel geochemical analysis on almost 200 fossil reef building samples that formed since the Late Pleistocene, the last 30 ka. The first part of this research focuses on improving the methodology for ICP-MS analysis. Then a series of experim

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29

Weber, Robert Joseph. "An experimental study of fractionation of the rare earth elements in poplar plants (Populus eugenei) grown in a calcium-bearing smectite soil." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/935.

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30

Bonsall, Todd Andrew. "The geochemistry of carbonate-hosted Pb-Zn-Ag mineralization in the Lavrion District, Attica, Greece fluid inclusion, stable isotope, and rare earth element studies /." [Ames, Iowa : Iowa State University], 2008.

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31

Matsumoto, Kenshi. "Crystal Structural Control of Nanomaterials toward High-Performance Permanent Magnets." Kyoto University, 2019. http://hdl.handle.net/2433/245309.

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32

Thomas, Jay Bradley. "Melt Inclusion Geochemistry." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11262.

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Silicate melt inclusions (MI) are small samples of melt that are trapped during crystal growth at magmatic pressures and temperatures. The MI represent a sample of the melt that was isolated from the magma during host crystal growth. Thus, MI provide a valuable tool for constraining the magmatic history of igneous systems because they provide an unambiguous method to directly determine compositions of melts from which the host crystal grew. As such, coupled petrographic examination and geochemical analyses of MI and host crystals can reveal information about crystal/melt processes in igneo

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33

Behrens, Melanie Kirstin [Verfasser], Katharina [Akademischer Betreuer] Pahnke, and Thorsten [Akademischer Betreuer] Dittmar. "Controls on rare earth element and neodymium isotope distributions in the West Pacific: local imprint vs. lateral transport / Melanie Kirstin Behrens ; Katharina Pahnke, Thorsten Dittmar." Oldenburg : BIS der Universität Oldenburg, 2017. http://d-nb.info/1132248485/34.

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34

Djeddi, Asma. "Pétrogenèse des carbonatites et magmas alcalins protérozoïques d’Ihouhaouene : terrane de l’In Ouzzal, Hoggar occidental, Algérie." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG022/document.

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Le craton archéen de l’In Ouzzal représente une succession d'événements intrusifs et métamorphiques depuis l’Eburnéen qui en font un marqueur important des processus géodynamiques à travers les temps géologiques. La région d’Ihouhaouene située au N-W du terrane de l’In Ouzzal en Algérie est unique de par la présence d’intrusions protérozoïques de carbonatites associées à des roches alcalines saturées. Ces carbonatites intracontinentales comptent parmi les plus anciennes et inhabituelles de par leurs diversités et la présence de minéraux à terres rares. Les carbonatites sont pegmatitiques ou br

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35

Link, Rainer. "Innovative approaches to recycling of small and electric motors from end-of-life vehicles, electric bicycles and industrial machinery." Thesis, KTH, Industriell ekologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190181.

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Recycling and recovery of materials and energy from waste is a key factor to mitigate virgin material demands and reduce resource consumption by utilising waste as a resource for new products. However, some critical materials, such as neodymium, are barely recycled because of missing information on amount and disposition of these critical materials within the waste streams. The goal of the study is to quantify recycling potentials from small and electric motors originating from end-of-life vehicles (ELV), electric bicycles and industrial machinery in Germany and the EU with focus on currently

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36

Dukes, David. "MET_Tower_Data.zip." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/450412.

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Geology<br>M.S.<br>Grasslands provide fundamental ecosystem services in many arid and semi-arid regions of the world, but are experiencing rapid increases in fire activity making them highly susceptible to post-fire accelerated soil erosion by wind. A quantitative assessment that integrates fire-wind erosion feedbacks is therefore needed to account for vegetation change, soil biogeochemical cycling, air quality, and landscape evolution. We investigated the applicability of a novel tracer technique – the use of multiple rare earth elements (REE) - to quantify aeolian soil erosion and to identif

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37

Lentz, David Richard. "Petrogenesis of uranium-, thorium-, molybdenum-, and rare earth element-bearing pegmatites, skarns, and veins in the central metasedimentary belt of the Grenville Province, Ontario and Quebec." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7941.

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Field examination of late-tectonic, U-, Th-, Mo-, and REE-bearing pegmatites, skarns, and veins in the southwestern Grenville Province indicates that they are spatially and temporally related. These observations lead to a renewal of the hypothesis that the deposits were related to intrusion of the pegmatites and formation of the skarns. The granitic pegmatites are related either to chemical fractionation of late-tectonic granitic plutons or mid-crustal anatectic melts with emplacement at the present structural level. This interpretation is based primarily on their discordant nature, late tecto

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38

ANGELO, JONHSON D. "Estudo das propriedades e microestrutura de ímãs permanentes de terras raras e metais de transição preparados pelo processo de decrepitação hidrogênio." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11268.

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39

Peterson, Charles Campbell. "Accurate Energetics Across the Periodic Table Via Quantum Chemistry." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822822/.

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Greater understanding and accurate predictions of structural, thermochemical, and spectroscopic properties of chemical compounds is critical for the advancements of not only basic science, but also in applications needed for the growth and health of the U.S. economy. This dissertation includes new ab initio composite approaches to predict accurate energetics of lanthanide-containing compounds including relativistic effects, and optimization of parameters for semi-empirical methods for transition metals. Studies of properties and energetics of chemical compounds through various computational me

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40

Berglund, James Lundstrom. "Karst Aquifer Recharge and Conduit Flow Dynamics From High-Resolution Monitoring and Transport Modeling in Central Pennsylvania Springs." Diss., Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/589966.

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Geoscience<br>Ph.D.<br>Karst aquifers are dynamic hydrologic systems which are sensitive to short-term recharge events (storms) and heterogeneous recharge characteristics (point recharge at sinks, irregular soil thicknesses). These aquifers are highly productive yet also vulnerable to contamination, in large part because the conduit network is a significant unknown for predicting karst flow paths. To address these uncertainties, two adjacent karst springs, Tippery Spring and Near Tippery Spring, were monitored to better understand flow and source mixing characteristics. The two springs in cent

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41

Holbik, Sven P. "Arc Crust-Magma Interaction in the Andean Southern Volcanic Zone from Thermobarometry, Mineral Composition, Radiogenic Isotope and Rare Earth Element Systematics of the Azufre-Planchon-Peteroa Volcanic Complex, Chile." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1524.

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The Andean Southern Volcanic Zone (SVZ) is a vast and complex continental arc that has been studied extensively to provide an understanding of arc-magma genesis, the origin and chemical evolution of the continental crust, and geochemical compositions of volcanic products. The present study focuses on distinguishing the magma/sub-arc crustal interaction of eruptive products from the Azufre-Planchon-Peteroa (APP 35°15’S) volcanic center and other major centers in the Central SVZ (CSVZ 37°S - 42°S), Transitional SVZ (TSVZ 34.3-37.0°S), and Northern SVZ (NSVZ 33°S - 34°30’S). New Hf and Nd isotopi

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42

BARBOSA, LUZINETE P. "Estudo das propriedades e microestrutura de ímãs permanentes de Pr-Fe-B-(Co-Nb) preparados pelo processo de hidrogenação, desproporção, dessorção e recombinação (HDDR)." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11280.

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43

Miura, Noriko, Yoshihiro Asahara, and Iwao Kawabe. "Rare earth element and Sr isotopic study of the Middle Permian limestone-dolostone sequence in Kuzuu area, central Japan: Seawater tetrad sffect and Sr isotopic signatures of seamount-type carbonate rocks." Dept. of Earth and Planetary Sciences, Nagoya University, 2004. http://hdl.handle.net/2237/7643.

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44

Zhou, Honggang. "Stress-diffusion interaction during oxide scale growth on metallic alloys." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34739.

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When a metallic alloy is placed in an oxygen environment, oxide scale may be formed on the metal surface. The continuous growth of such oxide scale is enabled by the diffusion of various ionic species in the scale layer primarily driven by the gradient of chemical potentials of these ionic species. In addition, the molar volume of oxide is typically greater than that of the base metal. Consequently, mechanical stresses are generated in the oxide scale. Such mechanical stress, in return, may affect the diffusion of ionic species resulting in different oxide growth kinetics. Such interaction bet

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TAKIISHI, HIDETOSHI. "Estudo da microestrutura e propriedades de ligas magneticas e imas permanentes de terras raras - metais de transicao - boro processados com hidrogenio." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10942.

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Made available in DSpace on 2014-10-09T12:45:52Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:05:37Z (GMT). No. of bitstreams: 1 07542.pdf: 8778356 bytes, checksum: 4518d6e06c451cc0d8b83aa7b2a1ac53 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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46

Mancco, Richard. "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." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76143.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 48).<br>This paper presents 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 forecasted world REE supply and demand. Information from the DOE Model was used in the report to gauge

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47

Djeddi, Asma. "Pétrogenèse des carbonatites et magmas alcalins protérozoïques d’Ihouhaouene : terrane de l’In Ouzzal, Hoggar occidental, Algérie." Electronic Thesis or Diss., Montpellier, 2019. http://www.theses.fr/2019MONTG022.

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Le craton archéen de l’In Ouzzal représente une succession d'événements intrusifs et métamorphiques depuis l’Eburnéen qui en font un marqueur important des processus géodynamiques à travers les temps géologiques. La région d’Ihouhaouene située au N-W du terrane de l’In Ouzzal en Algérie est unique de par la présence d’intrusions protérozoïques de carbonatites associées à des roches alcalines saturées. Ces carbonatites intracontinentales comptent parmi les plus anciennes et inhabituelles de par leurs diversités et la présence de minéraux à terres rares. Les carbonatites sont pegmatitiques ou br

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48

Roopnarain, Sherissa. "Petrogenesis of Carbonatites in the Alnö Complex, Central Sweden." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-215436.

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The Alnö Complex is a Late Precambrian alkaline and carbonatite intrusion (c. 30km2) into Early Proterozoic country rock that extends from the north east, to the north western shoulder of Alnö Island. Carbonatites are rare among volcanic provinces, with Oldoinyo Lengai of northern Tanzania being the only active carbonatite volcano in the world today. The high carbonate mineral volumes and rare earth element (REE) concentrations of carbonatites, in combination with the intrusive-extrusive nature of their suites contribute to the rarity of these rocks. Carbonatites, through their peculiar petrol

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49

Li, Yuting. "Investigating sediment size distributions and size-specific Sm-Nd isotopes as paleoceanographic proxy in the North Atlantic Ocean : reconstructing past deep-sea current speeds since Last Glacial Maximum." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273776.

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To explore whether the dispersion of sediments in the North Atlantic can be related to modern and past Atlantic Meridional Overturning Circulation (AMOC) flow speed, particle size distributions (weight%, Sortable Silt mean grain size) and grain-size separated (0–4, 4–10, 10–20, 20–30, 30–40 and 40–63 μm) Sm-Nd isotopes and trace element concentrations are measured on 12 cores along the flow-path of Western Boundary Undercurrent and in the central North Atlantic since the Last glacial Maximum (LGM). North Atlantic is a useful place to explore how size-specific sediment provenance is related to

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50

Pasinli, Türker Eroğlu Ahmet E. "Preconcentration And Atomic Spectrometric Determination of Rare Earth Elements (Rees) In Environmental Samples/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/kimya/T000460.doc.

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