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Название Rare-earth mineralization in Karelia’s alkaline and moderately alkaline complexes, associated metasomatic rocks and ores
DOI 10.17580/gzh.2019.03.09
Автор Kuleshevich L. V., Dmitrieva A. V.
Информация об авторе

Institute of Geology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk, Russia:

L. V. Kuleshevich, Leading Researcher, Candidate of Geologo-Mineralogical Sciences, kuleshev@krc.karelia.ru
A. V. Dmitrieva, Researcher, Candidate of Geologo-Mineralogical Sciences


Rare earth elements (REE) have recently found wide application in different branches of industry and in new technologies. In Karelia REE occur in alkaline rocks, carbonanites, lamproites, high and moderate alkalinity garnets, pergamites, alkaline and associated metasomatites, quartz conglomerates (paleoplacers) as well as in some uranium and noble metal mineralizations, REE exist in various minerals–bastnasite, parasite, monazite, xenotime, loparite, etc. none of commercial-scale ore objects have yet been found in Karelia. For this reason, this study aimed to assess alkaline and moderately alkaline rocks, associated metasomatites, as well as conventional and some unconventional types of ore mineralization in terms of REE occurrence. REE and their minerals were determined by ICP–MS and microprobe analyses. Assaying embraced different-age alkaline and moderately alkaline rock masses and systems, such as Elisenvaar, Tiksheozero–Eletozerom Salminsko-Ulyaleg, Syargozero, Kostomuksha intrusions (Shurlovaar massif, lamproites, garnet massifs), rocks of Koikar and Kumsa sills, skarn alkaline metasomatite (albitite), greisens, Cu–S and Cu–Au–Pt–Se–U mineralization of albitite and associated iron–magnesian metasomatites (related with IOCG-type). Concentrations of REE and associated rare elements, as well as the minerals ensuring these concentrations are determined. These research findings should facilitate discovery of REE-promising mineralizations and their predictive appraisal in the territory of Karelia.
The studies were carried out by R&D program of the Institute of Geology, Karelian Research Center, Russian Academy of Sciences.

Ключевые слова Karelia, rare-earth elements and minerals, ore occurrences, alkaline and moderately alkaline rocks, carbonatites, metasomatic rocks
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