An Extreme Concentration of Isomorphic Tantalum in Cassiterite from Lithium–Fluoric Granites (Arga-Ynnakh-Khaysky Massif, Yakutia)

The phenomenon of an abnormally high concentration of tantalum (5.3–17.9% of Ta 2 O 5 ) in accessory cassiterite from lithium–fluoric granites of the Arga-Ynnakh-Khaysky massif in East Yakutia is described. The significant isomorphic capacity of the cassiterite structure in relation to the tapiolite...

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Bibliographic Details
Published in:Doklady earth sciences 2020-02, Vol.490 (2), p.65-67
Main Authors: Alekseev, V. I., Marin, Yu. B., Galankina, O. L.
Format: Article
Language:English
Subjects:
Cassiterite
Crystallization
Earth and Environmental Science
Earth Sciences
Geochemistry
Geochronology
Granite
Lithium
Massifs
Metals
Mineral industry
Mining industry
Tantalum
Tantalum oxides
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Summary:The phenomenon of an abnormally high concentration of tantalum (5.3–17.9% of Ta 2 O 5 ) in accessory cassiterite from lithium–fluoric granites of the Arga-Ynnakh-Khaysky massif in East Yakutia is described. The significant isomorphic capacity of the cassiterite structure in relation to the tapiolite impurity, which reaches 15.1–39.8%, is established. It is concluded that the origin of tantalum-bearing cassiterite is determined by the specific crystallization conditions of lithium–fluoric granites, and their wide distribution in the Far East of Russia requires further study of the typochemistry of accessory cassiterite from rare-metal granites and genetically related metasomatites.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X2002004X