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Prospects of the use of zircon ores as a complex raw material on the example of the Azov deposit and the Yastrubetsk ore deposit (Ukrainian shield)

ABSTRACT

 

Report on the SRW: 98 pp., 6 chapters, 10 tables, 24 figures, 86 references.

 

The research objects are the Yastrubetsky zirconium-rare-earth ore deposit and the Azov zirconium-yttrium-rare-earth deposit.

The purpose of the work is a comprehensive scientific study of zircon ores using the example of zircon and other minerals in connection with the study of the content and distribution of rare earth elements (REEs) and Hf for different types of deposits using the example of the Azov deposit and the Yastrubetsky ore strike.

X-ray phase analysis and microprobe analysis were the main methods of experimental research. Samples were also examined by EPR and high-resolution NMR.

The results of the study showed that the spectrum of rare earths in the zircon of the Yastrubetsky orebody is essentially yttrium, and in the Azov deposit - cerium. Zircons of the Yastrubetsky orebody contain HfO2(0.7-1.46%), UO2(0.06-0.54%), ThO2(0-0.51%), REE2O3(0.24-0.89%), Y2O3(0-1.1%). Zircons of the Azov massif contain Hf(0.9-1.1%), U(0-0.06%), Th(0-0.04%), LREE(0.4-1.4%), HREE(0.04-0.14%), Y(0.16-0.4% ).

The increased content of U and Th oxides in the zircons of the Yastrubetsky orebody (0.1 - 0.55%) is one of the reasons for their metamict state, compared to the Azov ones. It was established that НREE in Yastrubetz zircons can be extracted in the technology of obtaining refined zirconium dioxide. A trend of increasing REE content in more metamict zircon from alkaline rocks and granites was revealed. It is assumed that REE3+ ions are localized in the metamict phase in mineral form.

The obtained results may contribute to the search for Hf, Y and REEs with the least environmental risks.

Authors:

Hrechanivskyi Oleksii Yevhenovych

Hrechanovska Olena Yevhenivna

Kalinichenko Anatolii Mykhailovych

Antonenko (Savchenko) Tetiana Serhiivna

Kanunikova Lidiia Ivanivna

Other authors:

Yushyn O.O.

Keywords:

zircon ores, Yastrubetsky zirconium-rare earth ore deposit, zircon, Azov deposit, X-ray phase analysis, nuclear magnetic resonance, electron paramagnetic resonance, electron probe microanalysis

Head of the research:

Hrechanivskyi Oleksii Yevhenovych

Registration Card (RC):

0117U002485

Execution period of the research:

2017 - 2021