O.M. Ponomarenko. NEW DATA ON ACCESSORY MINERALS OF RUSKA POLYANA GRANITES OF KORSUN-NOVOMYRHOROD PLUTON OF UKRAINIAN SHIELD

Англійська

https://doi.org/10.15407/mineraljournal.41.02.003

UDC 550.4:549.02 (477.46)

O.M. Ponomarenko 1, https://orcid.org/0000-0002-5179-6091

T. Mikuš 2, https://www.scopus.com/authid/detail.uri?authorId=55956705300

S.I. Kurylo 1, https://orcid.org/0000-0003-4466-6851, Researcher ID: B-4621-2019

S.M. Bondarenko 1, https://orcid.org/0000-0001-7948-3583

O.V. Zaiats 1, https://orcid.org/0000-0001-5011-029X,

O.V. Hrinchenko 3, https://orcid.org/0000-0003-3030-1720,

V.O. Syomka 1, https://orcid.org/0000-0001-5202-4045

S. Jeleň 2, https://orcid.org/0000-0002-1356-5209, Researcher ID: T-8524-2018

1 M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine

34, Acad. Palladin Ave., Kyiv, Ukraine, 03142

E-mail: igmrponomarenko@gmail.com, Kurylo.Sergiy@gmail.com,

Sbond.igmr@gmail.com, syomka1949@gmail.com

2 The Earth Science Institute of the Slovak Academy of Sciences

1, Ďumbierska Str., Banská Bystrica, Slovakia, 974 01

E-mail: mikus@savbb.sk, jelen@savbb.sk

3 Kyiv Taras Shevchenko National University. Educational-scientific institute "Institute of Geology"

90, Vasylkivska Str., Kyiv, Ukraine, 03022

E-mail: alexgrin@univ.kiev.ua

NEW DATA ON ACCESSORY MINERALS OF RUSKA POLYANA GRANITES OF KORSUN-NOVOMYRHOROD PLUTON OF UKRAINIAN SHIELD

Language: Ukrainian

Mineralogical journal 2019, 41 (2): 03-17

Abstract:

Interest in the Ruska Polyana subalkaline rare-metal granite is due to a wide range of their accessory minerals. There are few studies of accessory minerals of these granites and their chemical composition and the paper is aimed at filling this gap and identifying the main concentrations of rare elements in the granites. Granites samples from deep wells, drilled in the south-eastern area of rare-metal mineralization of the Ruska Polyana massif (Ruska Polyana Village) are investigated by scanning electron microscope JEOL JSM-6700F with EDS JED-2300 (M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Kyiv) microanalyzer JEOL JXA-8200 (Technical Center of the National Academy of Sciences of Ukraine, Kyiv) and microprobe JEOL JXA-8530F (The Earth Science Institute of the Slovak Academy of Sciences, Banská Bystrica). The Ruska Polyana granites contain accessory minerals zircon, thorite, fluorapatite, xenotime-(Y), monazite-(Ce), columbite-(Fe), ilmenorutile, rutile, ilmenite, gadolinite-(Y), (hingganite-(Y)) (?), synchisite-(Ce), bastnaesite-(Y), parisite-(Ce) (?), fluorite. This paper discusses their chemical composition. The composition of the accessory minerals of the Ruska Polyana granites is generally similar to that of rare-metal granites of the late phases of the magmatic activity of the Korosten complex. The presence of fluids has caused post-magmatic granite alteration, which resulted in formation a two-stage rare-metal mineralization. Zircon-apatite-xenotime-monazite-gadolinite-columbite-ilmenite association is typical of the early stage, and the late stage is characterized by fluorite-synchisite-parisite-bastnaesite-ilmenorutile associations.

Keywords: accessory minerals, rare elements, rare-metal granites, Ruska Polyana massif, Korsun-Novomyrhorod pluton, the Ukrainian Shield.

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