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Article
Meliphanite and Leucophanite from the Sakharjok Alkaline Massif, Kola Peninsula
Abstract—Meliphanite is an abundant mineral within a large nepheline syenite pegmatite and surrounding metasomatite of the Sakharjok alkaline massif, Kola Peninsula. In the pegmatite, it occurs as euhedral crysta...
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Article
On Composition of Meliphanite from Nepheline Syenite Pegmatite of the Sakharjok Massif, Kola Peninsula
The rare beryllium silicate, meliphanite, from nepheline syenite pegmatite of the Sakharjok massif, Kola Peninsula has been studied. The chemical composition of the mineral has been refined using infrared and ...
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Article
Origin, Occurrence, and Mobility of He and Ar Isotopes in Meliphanite
The U, Th, and 4He contents of meliphanite correspond to an age of metamorphism (1800 Ma) indicating good preservation of radiogenic 4He in mineral but contradicting the experience of U–Th–4He dating. For the ana...
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Article
The Paleoproterozoic Kolvitsa Anorthosite Massif: New Data on the U–Pb Age (ID TIMS) and Geochemical Features of Zircon
The rocks and minerals of the Kolvitsa massif are studied by complex isotopic–geochronological and geochemical (U–Pb, Sm–Nd, REE contents of zircons) methods. The isotopic U–Pb age (2448 ± 5 Ma) of single zirc...
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Article
The paleoproterozoic Kandalaksha Anorthosite Massif: New U–Pb (ID–TIMS) data and geochemical features of zircon
New U–Pb and Sm–Nd isotope data have been obtained in the Kandalaksha–Kolvitsa zone, Baltic Shield, on accessory zircon and rutile, along with whole-rock and secondary metamorphic minerals. Isotope U–Pb age of...
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Article
The first discovery of Hadean zircon in garnet granulites from the Sutam River (Aldan Shield)
For the first time in Russia, a Hadean zircon grain with an age of 3.94 Ga (ID-TIMS) has been discovered in high-aluminous garnet granulites of the Aldan Shield among the U–Pb zircons with an age from 1.92 Ga....
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Article
Stages in the formation of uranium mineralization in the Salla-Koulajarvinskaya zone (Northern Karelia): Geological and isotope geochronological data
On the basis of U–Pb, Rb–Sr and Sm–Nd isotopic data, it is shown that formation of uranium mineralization in the Paleoproterozoic Salla-Koulajarvinsky belt (Northern Karelia) was a long-lasting mult-stage proc...
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Article
Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, a new mineral from nepheline syenite pegmatite in the Sakharjok massif, Kola Peninsula, Russia
Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, is a new mineral found in nepheline syenite pegmatite in the Sakharjok alkaline massif, Western Keivy, Kola Peninsula, Russia. The pegmatite mainly consists of nephelin...
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Article
REE distribution in zircon from reference rocks of the Arctic region: Evidence from study by the LA-ICP-MS method
The results of the LA-ICP-MS analysis of the concentrations of REEs, U, Th, and Hf in zircon from Paleo- and Neoarchean reference rocks of the Kola region (garnet–amphibole gneiss, basic and acid granulites, a...
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Article
Autonomous anorthosites of the Anabar Shield: Age, geochemistry, and formation mechanism
The new high-accuracy data on U–Pb zircon geochronology, Sm–Nd systematics, and geochemistry of anorthosites of the Anabar Shield are discussed. It is established that anorthosite massifs are composed of gabbr...
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Article
Britholite ores of the Sakharjok Zr–Y–REE deposit, Kola Peninsula: Geochemistry, mineralogy, and formation stages
Britholite ores in the complex Sakharjok Zr–Y–REE deposit (Kola Peninsula) form linear bodies in nepheline syenite and contain britholite-group minerals and zircon as main ore minerals. Geochemical data indica...
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Article
Age of rare-metal pegmatites from the Vasin-Myl’k deposit (Kola region): Evidence from U-Pb geochronology of microlite
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Article
Fluorbritholite-(Y) and yttrialite-(Y) from silexites of the Keivy alkali granites, Kola Peninsula
Investigation of the morphology, anatomy, and chemical composition of fluorbritholite-(Y) and yttrialite-(Y) from silexites of the Keivy alkali granites in Kola Peninsula has shown that these minerals are the ...
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Article
Time of formation and genesis of yttrium-zirconium mineralization in the Sakharjok massif, Kola Peninsula
The Kola geotectonic province in the northeastern Fennoscandian Shield accommodates a significant number of alkaline rock massifs differing in age. They are of mantle and mantle-crustal origin (alkali and neph...
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Article
Minerals of the gadolinite-(Y)-hingganite-(Y) series in the alkali granite pegmatites of the Kola Peninsula
Minerals of the gadolinite-(Y)-hingganite-(Y) series pertaining to the gadolinite-datolite group have been found in the alkali granite pegmatites of the Kola Peninsula. Gadolinite-(Y) is distinguished by its u...
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Article
Ore geochemistry, zircon mineralogy, and genesis of the Sakharjok Y-Zr deposit, Kola Peninsula, Russia
The Sakharjok Y-Zr deposit in Kola Peninsula is related to the fissure alkaline intrusion of the same name. The intrusion ∼7 km in extent and 4–5 km2 in area of its exposed part is composed of Neoarchean (2.68–2....
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Article
Unique accessory Ti-Ba-P mineralization in the Kvalöya ultrapotassic dike, Northern Norway
Unusual ultrapotassic dikes were recently found on the Kvalöya Island in Northern Norway. The dikes crosscutting granites 1.8 Ga in age are 0.1–1.0 m thick and consist of phlogopite phenocrysts in a fine-grain...
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Article
Behoite and mimetite from the Saharjok alkaline intrusion, Kola Peninsula
The detailed study of the mineral composition of the nepheline syenite pegmatite from the Saharjok Intrusion has resulted in the finding of behoite and mimetite, a mineral species identified in the Kola region...
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Article
Multiple crystallization of zircon in the Sakharjok rare-earth element-zirconium deposit, Kola Peninsula
