 | | Journal (article/letter/editorial) | | middle-heavy rare earth elements in the Bayan Obo deposit, Northern China T Xiao-zhi Houa, , Zhan-feng Yangb...Research Institute, Inner Mongolia University of Science and Technology, Baotou 014010, China Rare Earth Research...Laboratory of Bayan Obo, Baotou 014000, China c Baotou Rare Earth Research Institute, Baotou 014000, China b ARTICLE...Enrichment mechanism Bayan Obo deposit The Bayan Obo deposit is a world-class Fe-REE-Nb deposit, and its reserves...rare earth elements (M−HREE) resources, the Bayan Obo deposit with such a huge amount of M−HREE cannot be |  | | Journal (article/letter/editorial) | | REVIEW Assessing rare earth element mineral deposit types and links to environmental impacts Z. H. Weng*1...modest scale of the global REE mining sector means that the REE mineral deposit type knowledge base is small...classification scheme for differing REE mineral deposit types, outline the geological processes that cause...on the environmental impact associated with REE mining, extraction and processing. Although current global...mineralogy is linked to environmental risks during mining and refining, especially aspects such as radioactive |  | | Journal (article/letter/editorial) | | the minerals euxenite [(Y,Ca,Ce,U,Th) (Ti,Nb,Ta)2O6] and gadolinite [(Ce,La,Nd,Y)2FeBe2Si2O10]. Scandium...referred to as Landsverk 3, in the Iveland-Evje district north of Kristiansand in Norway. The mineral was...accompanied by other REE minerals, notably gadolinite-(Y), and fluorite. Although the Baveno granites and their...ilmenorutile. For example, in the Iveland-Evje district (Norway), the scandium content of ilmenite in... Zirconolite [(Ca,Ce)Zr(Ti,Fe,Nb)2O7] in this deposit contains 208 ppm Sc, on average (Kalashnikov et |  | | Report (issue) | | ............................................O4 China..............................................................................................O7 Deposit Types......................................................O10 O3. Active rare-earth mines, by deposit type.............................................reported estimates of their REE resources, by deposit type. ...........................................0.03527 0.03215075 32.15075 2.205 1.102 0.9842 Deposit grade 0.0291667 Pressure 10 10,000 Density 62.4220 |  | Smith, M.P., Moore, K., Kavecsánszki, D., Finch, A.A., Kynicky, J., Wall, F. (2016) From mantle to critical zone: A review of large and giant sized deposits of the rare earth elements. Geoscience Frontiers, 7 (3) 315-334 doi:10.1016/j.gsf.2015.12.006 | Journal (article/letter/editorial) | | total rare earth oxide, but the importance of a deposit may be related to the grade for individual, or...total REE resource, only one currently known deposit (Bayan Obo) would class as giant (>1.7×107 tonnes contained...unclassified resource estimates from the Olympic Dam IOCG deposit, all of these deposits M AN U are related to...of some of the largest deposits AC C (e.g. Bayan Obo). Hydrothermal activity involving fluids from...Rare earth elements; Carbonatite; Syenite; Giant deposit; Grade 1. Introduction The rare earth elements |  | | Book | | nearly all metals and the inevitable closing of many mining operations, it is a matter of the industry's survival...decision, not only is a handy volume affered to the mining and processing community but also duplication of...Z = 63) Europium (Gd, Z = 64) Gadolinium Yttrium (Y, Z = 39), although not a lanthanide, is eonveniently...similarity in ehemieal behaviour among the REE plus Y, and between Nb and Ta, that strongly influenees their... . . . . . . . . . 80 Part II Geochemistry REE (Y), Nb, and Ta Enrichment in Pegmatitesand Carbonatite-Alkalic |  | | Book | | in southwestern Arizona. When used with a town or city this designation indicates the direction in which...Just, Perth, Australia; Richard Thomssen, Carson City, Nevada, USA; Peter Embrey, London, England; Jessie...T1 Th Sn Ti TiOx WO4 WO3 W WOx u UOx UO2 V VOx Yb Y Zn Zr No. 162 109 17 12 15 1337 91 422 429 424 50...535. See also Rynersonite, Vigezzite, Aeschynite-(Y), Niobo-aeschynite-(Ce). Aeschynite-(Nd), (Nd, Ce...Ca)(Ti,Nb)2(0,0H)6, dark/light brown. Bayan Obo, Inner Mongolia, China. 0 Syst=? Adamantine H= 5-6, Djjj= |  | | Book (edition) | | cover photo: Ottensite, 35 111111, Qinglong dist., China Fluomatromicrolite, x 25111111, Naipa mine, Mozambique...Zarshouran Au-As deposit, Takab region, Iran Grandviewite, 5 111111, Capillitas deposit, Argentina Calciopetersite...reserved. No part of this work may be reproduced by a~y mecl~~nical, photographi~, or electronic ~rocess_...province prefecture county departement departamento district municipio...77, 5.83, a,p,y = 89°06', 89°54', 91°30'; pseudohexagonal a,b,c = 23.6, 3.6, 6.2, a,p,y= 91°, 92°, 90° |  | | Book | | ( ew ‘ )) AT “EL aye ia a ae daaYepAoNpte Nee Y ; Limonite, Eldorado, Ontario, Canada Preface here... Balto-Slavic Indo-Iranian Ay y* Celtic Anatolian oa \ “6 y< Hellenic & West vis\ Germanic...nebh-ela, cloud Gk. nephele, cloud nepheline / y Romance languages Greek Middle English ca.! 100-1500...Férh. 13, 781. Moore, Forms series with aeschynite-(Y) and niobo- P.B. (1968): Arkiv Mineral. Geol. 4,...orth., Pbnm. See aeschynite-(Ce). China. Bayan Obo, Inner Mongolia, Zhang, P. & Tao, K. (1982): Sci |  | | Book | | exotic to readers from other continents because mining is currently pretty insignificant in Europe. However...researched and serve as good examples for important deposit types found worldwide. We thank Susanne Herting-Agthe... . . . . . . . . . . . . . . . . 1.10 Open-Pit Mining . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . 1.11 Underground Mining . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . 1.13 Deep-Sea Mining . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (issue) | | geology and global distribution of the mineral deposit types that account for the present and possible...tungsten, rare-earth elements, and antimony in China; niobium in Brazil; and platinum-group elements...potential environmental and health issues caused by the mining and processing of many mineral commodities may...the environmental considerations related to the mining of nonfuel mineral resources, including the modern...framework and development of geoenvironmental mineral-deposit models. vi Chapters C through V describe individual |  | | Thesis/Dissertation | | ppm – parts per million REEs – Rare Earth Elements (Y + Lanthanides: La-Lu) SOFC – Solid Oxide Fuel Cells...Be-bearing minerals, comprising mica, beryl, gadolinite-(Y) and bazzite, have been studied from 17 Tørdal pegmatites...the intermediate and albite replacement zones (inner zones of the pegmatite body). In the Svåheii 2b...mica. Mapping of Be-minerals shows that gadolinite-(Y) occurs only in the wall zones of pegmatites, while...these elements become incorporated in gadolinite-(Y), mica, garnet, beryl and bazzite during final crystallization |  | | Book | | between a1, a2 and a3. Examples: bastnäsite, (Ce,La,Y)CO3F, benitoite, BaTi[Si3O9]. 5 *622, hex.-trapezohedral:...described by an index ellipsoid with the axes X, Y, Z, referred to as the optical indicatrix (in short:...of a triaxial ellipsoid with the principal axes Z, Y, and X. The refractive index along Z (= nγ) is always...display two circular sections that intersect in the Y-axis (= nβ). Two optic axes that are normal to these...sections are located in the nγ-nα plane normal to Y (= nβ), the optic plane (. Fig. 1.27b). Looking along |
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