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«IZVESTIYA IRKUTSKOGO GOSUDARSTVENNOGO UNIVERSITETA». SERIYA «NAUKI O ZEMLE»
«THE BULLETIN OF IRKUTSK STATE UNIVERSITY». SERIES «EARTH SCIENCES»
ISSN 2073-3402 (Print)

List of issues > Series «Earth Sciences». 2025. Vol 54

Features of Apatite Crystallization from Granites of the Kuzpuayu Massif (the Subpolar Urals)

Author(s)

Yu. V. Denisova1

1 Institute of Geology named after academician N. P. Yuskin Komi SC UB RAS, Syktyvkar, Russian Federation

Abstract
The study presents the results of research on apatite from rocks of the Kuzpuayu massif, which belongs to the Salnero-Mankhambov granitoid complex of the Subpolar Urals. The investigation identified apatite with hexagonal prismatic and hexagonal dipyramidal-prismatic habits. A detailed study of the mineral's morphology and chemical composition made it possible to establish two main morphological types of apatite with a division into five subtypes, and to trace the evolution of the crystals. During the early magmatic stages, tabular type II apatites with low water content crystal- For complete information about the author, see the last page of the article. lized from a high-temperature (from 893 °C), fluorine-enriched melt. As the system evolved and the activity of aqueous fluids increased during later stages at lower temperatures (down to 727 °C), prismatic type I apatites, enriched in water and sodium, were formed.
About the Authors
Denisova Yulia Vjacheslavovna, Junior Research Scientist Institute of Geology Named after Academician N. P. Yuskin Komi SC UB RAS 54, Pervomayskaya st., Syktyvkar, 167982, Russian Federation e-mail: yulden777@yandex.ru
For citation
Denisova Yu.V. Features of Apatite Crystallization from Granites of the Kuzpuayu Massif (the Subpolar Urals). The Bulletin of Irkutsk State University. Series Earth Sciences, 2025, vol. 54, pp. 132-148. https://doi.org/10.26516/2073-3402.2025.54.132 (in Russian)
Keywords
apatite, granite, saturation temperature, the Kuzpuayu massif, the Subpolar Urals.
UDC
552.321.1+552.113+550.425+549.753.11(234.851)
DOI
https://doi.org/10.26516/2073-3402.2025.54.132
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