Results 11 to 20 of about 355 (183)
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 +3 more
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REE MINERALS IN BLACK SHALES OF THE PALEOPROTEROZOIC MIKHAILOVKA FORMATION (BAIKAL-PATOM HIGHLAND, SIBERIA) [PDF]
Минералогия, 2022 The paper characterizes REE mineralization from carbonaceous metapelites of the Paleoproterozoic Mikhailovka Formation, which is the most ancient gold-bearing horizon of the Lena province (Bodaibo district, Irkutsk region). The conditions of metamorphism
E.E. Palenova +3 more
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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
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Frontiers in Earth Science, 2022 Fluids play a major role in facilitating igneous/metamorphic processes in the Earth’s crust and mantle. In this study, we investigate the nature and composition of fluids in Earth’s interior by studying the lower crustal rocks.
Vinod O. Samuel +4 more
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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
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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 +9 more
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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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