Minerals-concentrators of rare-earth elements in basites-ultrabasites intrusives of Norilsk district
Известия высших учебных заведений: Геология и разведка, 2017 The conditions of being, the history of formation and transformation of minerals-concentrators of rare-earth elements (REE) - apatite minerals group and epidote minerals group, have been studied and described.
Yu. D. Gritsenko, A. A. Serova
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KUKHARENKOITE-(Ce) AND ITS MINERAL ASSEMBLAGE IN PEGMATITES OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]
Минералогия, 2021 A rare Ba and REE fluorocarbonate kukharenkoite-(Ce) Ba2 Ce(CO3 )3 F with empirical formula (Ba1.88Sr0.17)2.05(Ce0.53La0.31Nd0.11)0.95(CO3 )3 F was found in alkali pegmatite of vein no. 35 in the Vishnevye Mountains, South Urals. Kukharenkoite-(Ce) forms
V.I. Popova +4 more
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Apatite, monazite and allanite; three rare earth minerals from Korsnäs, Finland [PDF]
Bulletin of the Geological Society of Finland, 1972 In the RE-bearing lead deposit of Korsnäs, apatite is the most common RE-mineral, monazite is a widespread accessory and allanite is a rare constituent. The paper describes one type of each.
H. Papunen, O. Lindsjö
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Materials Proceedings, 2022 This review presents a mineralogical and physicochemical comparison of coal seams located in the regions of Northwest and Central Greece. The comparison extends to the fly ash derivatives from the coal combustion for energy production, in the cases where
Nikolaos Koukouzas +6 more
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Syn-metamorphic folding in the Tauern Window, Austria dated by Th-Pb ages from individual allanite porphyroblasts [PDF]
, 2015 High-precision 232Th-208Pb dates have been obtained from allanite porphyroblasts that show unambiguous microstructural relationships to fabrics in a major syn-metamorphic fold in the SE Tauern Window, Austria.
Bickle +28 more
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On the identification of Ti-Ta-Nb-oxides in “wiikites” from Karelia [PDF]
, 2018 Purpose. With respect to the nature of Ti-Ta-Nb-oxides, which are included in the mineral associations that have historically gone by the now outdated name of “wiikites”, there is no unanimity of opinion.
Bogdanov, R +5 more
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Multi-method characterization of rare blue quartz-bearing metavolcanic rocks of the Rio dos Remédios Group, Paramirim Aulacogen, NE Brazil [PDF]
Brazilian Journal of Geology, 2023 The Rio dos Remédios Group comprises a supracrustal sequence that occupies the base of the Espinhaço Supergroup, São Francisco Craton, Brazil. Its basal formation, Novo Horizonte, crops out in the Paramirim region mainly as metavolcanic rocks that ...
Danielle Cruz da Silva +4 more
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Layering in rapakivi granite, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 1974 Layering in rapakivi granite occurs locally in the islet Söderören, Åland, SW Finland. The layering consists of 3—5 cm thick, rhythmically repeated layers with high concentrations of biotite, hornblende, allanite and olivine.
C. Ehlers
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Crystal chemistry of volcanic allanites indicative of naturally induced oxidation-dehydrogenation [PDF]
, 2010 The crystal chemistry of volcanic allanites from both the Youngest Toba Tuff (YTT), Sumatra, Indonesia and SK100 volcanic ash beds (SK100-VAB), Niigata, Japan has been examined by electron microprobe analysis (EMPA), Fourier-transform infrared ...
Akasaka Takeshi +6 more
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Caracterização mineralógica, geoquímica e potencial econômico de ocorrências de terras raras do maciço granítico Serra do Mendes, Goiás [PDF]
, 2017 Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Programa de Pós-Graduação em Geologia, 2017.O Maciço Granítico Serra do Mendes (MGSM) está localizado na Província Estanífera de Goiás (PEG), que é caracterizada por corpos de ...
Zapata Montoya, Angélica María
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