Results 1 to 10 of about 2,639 (190)

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, M.A. Rassomakhin, V.A. Popov, A.M. Kuznetsov, S.M. Lebedeva   +4 more
doaj   +1 more source

MINERALOGY OF HOST ROCKS OF THE OSINOVSKOE GOLD-QUARTZ DEPOSIT (CENTRAL URALS) [PDF]

Минералогия, 2023
The paper describes the mineralogy of mica shales of the Osinovskoe gold deposit in the Central Urals. Our studies unraveled the role of dynamometamorphism in the transformation of primary rocks and allowed the characterization of their metasomatic ...
N.P. Safina, L.Ya. Kabanova, I.A. Blinov
doaj   +1 more source

Mineralogy and Mineral Chemistry of the REE-Rich Black Sands in Beaches of the Kavala District, Northern Greece

Geosciences, 2022
The coastal area of the Kavala district, Northern Greece, is characterized by minerals enriched in rare earth elements (REE). The present study focuses on the mineralogy of the black sands from six different locations and the comprehensive mineral ...
Eftychia Peristeridou, Vasilios Melfos, Lambrini Papadopoulou, Nikolaos Kantiranis, Panagiotis Voudouris   +4 more
doaj   +1 more source

Compositional variation and zoning of epidote supergroup minerals in the Campi Flegrei geothermal field, Naples, Italy [PDF]

European Journal of Mineralogy, 2023
Authigenic epidote supergroups are an abundant accessory mineral in the calcium–aluminum silicate and thermometamorphic hydrothermal zones of the Campi Flegrei (Phlegraean Fields) geothermal field located west of Naples, Italy. Geothermal exploration for
H. E. Belkin, B. De Vivo, B. De Vivo
doaj   +1 more source

Low Temperature Leaching Behavior of Allanite-(Ce) in Treating an Allanite-Concentrate by Sulfuric Acid

Journal of Sustainable Metallurgy, 2023
AbstractAllanite is a common REE-bearing silicate mineral, which is found in potentially mineable abundances in many areas but has not been economically exploited for the REEs in an industrial scale. Conventional methods, such as sulfuric acid baking at high temperatures (200 to 650 °C) followed by extended water leaching near boiling temperature, have
Kimmo Kärenlampi, Emilia Väänänen, Tuomas Roivainen, Paavo Perämäki   +3 more
openaire   +1 more source

RöENTGENITE-(CE) AND OTHER REE FLUORCARBONATES FROM VEIN no. 35, VISHNEVYE MOUNTAINS, SOUTHERN URALS [PDF]

Минералогия, 2019
A mineral assemblage including REE fluorcarbonates (röntgenite-(Ce) Ca2Ce3(CO3)5F3 , parisite-(Ce) CaCe2(CO3 )3F2 , synchisite-(Ce) CaCe(CO3 )2F and bastnäsite-(Ce) Ce(CO3 )F) was discovered at the dumps of the Vein № 35 open pit, Mt.
A.V. Kasatkin, R. Škoda, F. Nestola, A.M. Kuznetsov, E.V. Belogub, A.A. Agakhanov   +5 more
doaj   +1 more source

Liguowuite, WO₃, a new member of the A-site vacant perovskite type minerals from the Panzhihua–Xichang region, China [PDF]

European Journal of Mineralogy, 2022
A new member of the non-stoichiometric perovskite group mineral species, liguowuite, ideally WO3, has been found in the Neoproterozoic Sinian biotite-quartz monzonite in the southern part of the Panzhihua–Xichang region (Nanyang village: 26∘46′8.21′′ N ...
Y. Xue, Y. Xue, N. Sun, H. He, H. He, A. Chen, Y. Yang, Y. Yang   +7 more
doaj   +1 more source

EMPA-SEM Study on the Rare Earth Minerals from the Huayangchuan Uranium Rare Polymetallic Deposit, Shaanxi Province

Yankuang ceshi, 2021
BACKGROUND The Huayangchua polymetallic deposit is a super-large mineral deposit that has economic endowments of uranium and rare earth resources. The deposit is characterized by the unique ore types and complex mineral assemblage.
WAN Jian-jun, PAN Chun-rong, YAN Jie, KANG Qing-qing, HONG Bin-yue, ZHONG Fu-jun, HUANG Hui, DU Jing-yong, YAN Zhao-bin, PAN Jia-yong   +9 more
doaj   +1 more source

Age and origin of the Nb-Zr-REE mineralization in the Paleoproterozoic A1-type granitoids at Otanmäki, central Finland [PDF]

Bulletin of the Geological Society of Finland, 2020
The Otanmäki area in central Finland hosts two occurrences of Nb-Zr-REE minerali-zation, Katajakangas and Kontioaho, within a suite of ca. 2.04–2.06 Ga (A1-type) gneissic granites, syenite and monzonite-monzodiorite.
Kimmo Kärenlampi, Asko Kontinen, Eero Hanski, Hannu Huhma, Yann Lahaye, Joachim Krause, Thomas Heinig   +6 more
doaj   +1 more source

Mechanical and structural properties of radiation-damaged allanite-(Ce) and the effects of thermal annealing [PDF]

Physics and Chemistry of Minerals, 2019
The onset of thermally induced, heterogeneous structural reorganization of highly radiation-damaged allanite-(Ce) begins at temperatures below 700 K. Three strongly disordered allanite samples (S74 20414: ~ 0.55 wt% ThO2, 22.1 wt% REE oxides, and maximum radiation dose 3.5 × 1018 α-decay/g; LB-1: ~1.18 wt% ThO2, 19.4 wt% REE oxides, and maximum ...
Reissner, Claudia E., Bismayer, Ulrich, Kern, Daniel, Reissner, Michael, Park, Sulgiye, Zhang, Jiaming, Ewing, Rodney C., Shelyug, Anna, Navrotsky, Alexandra, Paulmann, Carsten, Škoda, Radek, Groat, Lee A., Pöllmann, Herbert, Beirau, Tobias   +13 more
openaire   +2 more sources