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Vladimir A. Popov
Vladimir A. Popov
Leading Researcher, Ph.D., Dr.Sci.
South Ural Federal Scientific Center of Mineralogy and Geoecology of the Ural Branch of the RAS
Leading Researcher, Ph.D., Dr.Sci.
South Ural Federal Scientific Center of Mineralogy and Geoecology of the Ural Branch of the RAS

Articles

Geology
  • Date submitted
    2022-04-04
  • Date accepted
    2022-05-13
  • Date published
    2022-07-13

Distribution of trace elements controlled by sector and growth zonings in zircon from a miaskite pegmatite of the Vishnegorsky massif, the Southern Urals

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Data on the content and distribution of trace and rare-earth elements (SIMS method) in sectors and growth zones of a large zircon crystal from miaskite pegmatites of the Vishnegogorsky massif are presented. The morphology of the zircon crystal is a combination of a dipyramid {111} and prism {010}. It has been established that the growth sector of dipyramid {111} is characterized by almost one order of magnitude higher contents of Y, Nb, REE, Th; higher Th/U and Eu/Eu* values; REE distribution spectra are flatter compared to prism {010} growth sector. A regular decrease in the content of trace and rare-earth elements in the direction from the central zone to the marginal zone of crystal growth was revealed. A smooth regression of zircon crystallization temperature of zircon from 960 °C in the central zone to 740 °C in the marginal zone of the dipyramid sector and 700-650 °C in the prism sector has been revealed, which may be a reflection of thermal evolution of the crystallization process. It is assumed that crystallization of the central zone of zircon occurred at early stages from a relatively trace-еlement-rich melt. The crystallization was completed at lower temperatures, probably, simultaneously with the formation of REE-concentrating minerals, which resulted in natural decrease of content of trace and rare-earth elements in the melt and, consequently, in zircon crystallizing from it.

How to cite: Levashova E.V., Popov V.A., Levashov D.S., Rumyantseva N.A. Distribution of trace elements controlled by sector and growth zonings in zircon from a miaskite pegmatite of the Vishnegorsky massif, the Southern Urals // Journal of Mining Institute. 2022. Vol. 254. p. 136-148. DOI: 10.31897/PMI.2022.29
Without section
  • Date submitted
    1987-09-21
  • Date accepted
    1987-11-12
  • Date published
    1988-03-01

Системы водо- и воздухоснабжения подземных рудников и их роль в распространении блуждающих токов

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Современная технология проведения буровзрывных работ рассчитана на эк сплуатацию оборудования призабойной зоны, использу ю щего сжат ы й воздух при дав лени и 0,5-0,6 МПа и воду при давлении 0,3 П а ...

How to cite: Kudashev E.A., Dubinin A.F., Popov V.A., Berkman M.I. // Journal of Mining Institute. 1988. Vol. 117. p. 11.