 | Doroshkevich, Anna G., Veksler, Ilya V., Klemd, Reiner, Khromova, Elena A., Izbrodin, Ivan A. (2017) Trace-element composition of minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma evolution and carbonatite formation. Lithos, 284. 91-108 doi:10.1016/j.lithos.2017.04.003 | Journal (article/letter/editorial) | | magmatic evolution of the complex and clarifying the CE P origin of carbonatites. We conclude that the observed...minerals. The geochemical data are used for the CE P assessment of the roles of fractional crystallization...ankerite carbonatite (Doroshkevich et al., 2016). CE P Rock textures and mineral assemblages were studied...out in the Geological Institute SB RAS, Ulan- 4. CE P Ude, Russia and the Zavaritsky Institute of Geology...phlogopite and nepheline. Accessory calcite, ancylite-(Ce), rutile and baddeleyite have been also found. A |  | | Journal (article/letter/editorial) | | fluorite, barite, quartz, phlogopite, aegirine and bastnäsite. Some samples are, however, exceptionally rich...high Δ47 values. At 1 bar pressure, natural bastnäsite-(Ce) decomposes at temperatures above 255°C, indicating...(2015) The thermodynamic properties of bastnäsite-(Ce) and parisite-(Ce). Chem. Geol. 392, 87–101. Halama...(2010) Noble gas and carbon isotopic signatures of Cape Verde oceanic carbonatites: Implications for carbon...silica deposition and associated Feoxide. K: Bastnäsite grain in a ferrocarbonatite with calcite inclusions |  | | Journal (article/letter/editorial) | | parisite and synchysite with minor bastnäsite that have high (La/Nd)cn and (La/Ce)cn values. The early minerals...Rare-earth elements are hosted by fluorocarbonates (bastnäsite, parisite and synchysite), ancylite, monazite...study contain Ce as the dominant lanthanide element [i.e., bastnäsite-(Ce), monazite-(Ce), etc.], we omitted...mineral compositions on chondritenormalized (cn) (La/Ce)cn vs. (La/Nd)cn plots (Fig. 4A). Positive correlations...in Mn, Sr and light REE (LREE = La-Nd), with Nd ≫ Ce and (Y/Ho) values between 25 and 30 (Table 1). Chondrite-normalized |  | | Journal (volume) | | J.3 Centre for Minerals Research, University of Cape Town, South Africa (*megan.becker@uct.ac.z) 2 Dept...admixtures in fulgurites elements-hydrolyzates La, Ce, Nd, Zr and also Br are slightly accumulated. Ba...analysis showed that figures of cerium anomaly A(Ce)=CeN/CeN* form sequence: 1.56 (initial rocks) Ö 0... based on 41516182 sheets (A = Na, K, H3O; REE = Ce, La, Eu), and four members of the rhodesite mero-plesiotype...sandy loam Sandy silt (av. of all samples) 0 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu |  | | Book | | Department of Geological Sciences University of Cape Town Rondebosch, South Africa ISSN 2510-1307 ISSN...bisectors between a1, a2 and a3. Examples: bastnäsite, (Ce,La,Y)CO3F, benitoite, BaTi[Si3O9]. 5 *622,...partial substitution of U by Th and REE, especially Ce. Radioactive decay of U invariably leads to the formation...Chemical composition Ce can be replaced by La, Nd and Th. Monazite-(Ce) is characterised by Ce > (La + Nd), monazite-(La)...monazite-(La) by La > (Ce + Nd) and monazite-(Nd) by Nd > (La + Ce). The ThO2 contents are highly variable |
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