Results 21 to 30 of about 1,895 (220)

KUKHARENKOITE-(Ce) AND ITS MINERAL ASSEMBLAGE IN PEGMATITES OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]

open access: yesМинералогия, 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
doaj   +1 more source

Apatite, monazite and allanite; three rare earth minerals from Korsnäs, Finland [PDF]

open access: yesBulletin 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
doaj   +1 more source

Physicochemical Properties and REE Distribution of the Northwest and Central Greece Coal Deposits: A Review

open access: yesMaterials 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
doaj   +1 more source

Geochronology of accessory allanite and monazite in the Barrovian metamorphic sequence of the Central Alps, Switzerland [PDF]

open access: yes, 2017
The formation of accessory allanite, monazite and rutile in amphibolite-facies rocks across the Barrovian sequence of the Central Alps (Switzerland) was investigated with a combination of petrography and geochemistry and related to the known structural ...
Amelin, Yuri   +9 more
core   +3 more sources

Multi-method characterization of rare blue quartz-bearing metavolcanic rocks of the Rio dos Remédios Group, Paramirim Aulacogen, NE Brazil [PDF]

open access: yesBrazilian 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
doaj   +1 more source

Layering in rapakivi granite, SW Finland [PDF]

open access: yesBulletin 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
doaj   +1 more source

The Polumir granite: Addititional data on its origin [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2002
The Polumir granite is exposed on several localities due to erosion, and its chemical and mineral composition is presented in this paper. It is built of K-feldspar, plagioclase, myrmekite, metasomatic albite, biotite, muscovite and quartz, while apatite,
Vukov Milenko S., Milovanović Dragan
doaj   +1 more source

Corona formation around monazite and xenotime during greenschist-facies metamorphism and deformation [PDF]

open access: yesEuropean Journal of Mineralogy, 2020
Epidote/allanite–fluorapatite coronae around monazite and xenotime are investigated in Permian pegmatites deformed under greenschist-facies conditions during Alpine tectonometamorphism in the Austroalpine basement, Eastern Alps.
F. Hentschel   +4 more
doaj   +1 more source

Non-matrix-matched standardisation in LA-ICP-MS analysis: general approach, and application to allanite Th–U–Pb dating [PDF]

open access: yes, 2017
To make use of the full geochronological potential of accessory minerals such as zircon, allanite, monazite, and titanite, high spatial resolution isotopic analysis of the Th–U–Pb system is required.
Pettke, Thomas   +7 more
core   +1 more source

Rare earth elements and yttrium minerals in altered granite-porphyry and hosting high-alumina schists in the Pellapahk Cu-Mo occurrence (Kolmozero-Voronya Belt)

open access: yesVestnik MGTU
Rare Earth Elements (REE) and yttrium phosphates monazite-(Ce) and xenotime-(Y), fluorine carbonates synchysite-(Ce) and parisite-(Ce), silicate allanite-(Ce) have been studied in the metamorphic rocks in the area of the Pellapahk Cu-Mo porphyry ...
Kalinin A. A.   +2 more
doaj   +1 more source

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