О.М. Ponomarenko, FEATURES OF REE DISTRIBUTION IN APATITES OF GRANULITE-GNEISS ROCKS OF PODILSK BLOCK UKRAINIAN SHIELD

https://doi.org/10.15407/mineraljournal.42.03.027

UDC 549.753.1:550.84 (477)

FEATURES OF REE DISTRIBUTION IN APATITES OF GRANULITE-GNEISS ROCKS OF PODILSK BLOCK UKRAINIAN SHIELD

О.М. Ponomarenko, DrSc (Geology & Mineralogy), Academician of NAS of Ukraine, Director

E-mail: pan.igmof@gmail.com

https://orcid.org/0000-0002-5179-6091

A.I. Samchuk, DrSc (Chemistry), Chief Research Fellow

E-mail: igmrsamchuk@gmail.com

https://orcid.org/0000-0001-8992-9112

I.M. Lisna, PhD (Geology & Mineralogy), Senior Research Fellow

E-mail: Lesirmich@ukr.net

https://orcid.org/0000-0001-7545-1752

L.V. Somka, Researcher Fellow

E-mail: liudmylas26@gmail.com

https://orcid.org/0000-0002-7059-2502

I.A. Shvaika, PhD (Geology), Researcher Fellow

E-mail: ishvaika@gmail.com

https://orcid.org/0000-0001-9585-4380

L.I. Proskurka, Junior Research Fellow.

E-mail: igmrproskurko@gmail.com

https://orcid.org/0000-0001-5760-2000

I.D. Shvaika, Lead Engineer

E-mail: igor.d.shvayka@gmail.com

https://orcid.org/0000-0002-1908-6639

K.V. Vovk, PhD (Geology), deputy director

E-mail: vovkkaterina90@gmail.com

https://orcid.org/0000-0001-5076-260X

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

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

Language: Ukrainian

Mineralogical journal 2020, 42 (3): 27-38

Abstract: As a result of studying of the distribution of rare earth elements (REE) in apatites from metamorphic rocks that occur as xenoliths (skialites) among Berdychiv granites and charnockites of the Podilsk block of the Dniester-Bug Megablock of the Ukrainian Shield, it was found that apatites of granulite-gneiss rocks are characterized by a low fractionation of REE with predominant light REE and sharp deficiency europium, which is characteristic of calc-alkaline rocks of other shields. As to the metamorphic rocks of the Bereznin stratum the maximum content of REE found in apatites is characteristic of melanocratic rocks which commonly found in the central zones of metamorphic xenoliths. At the contact with granitoids the content of REE decreases. All xenoliths became zonal due to the such factor as acid-basic ratio that control the differentiation of REE in mineral-forming environment. It has been suggested that the spectra of REE distribution found in apatites from metamorphic rocks, which occur as of xenoliths among granitoids, may indicate the nature of xenoliths. They can be either the substrate for these granitoids or occur as dyke or restite formations.

Keywords: apatites, rare earth elements, granitization of gneisses and crystalline shist, Ukrainian Shield.

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