Wolframoixiolite in lithium-fluoric granites of the Arga-Ynnakh-Khaysky massif, Yakutia

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Marco E. Ciriotti
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Wolframoixiolite in lithium-fluoric granites of the Arga-Ynnakh-Khaysky massif, Yakutia

Messaggio da Marco E. Ciriotti » mer 07 ago, 2019 12:32

Referenza:
▪ Alekseev, V.I., Marin, Y.B., Galankina, O.L. (2019): Wolframoixiolite in lithium-fluoric granites of the Arga-Ynnakh-Khaysky massif, Yakutia. Zapiski RMO, 148(3), 44-58.

Abstract:
For the first time, lithium-fluoric granites and ongonites of the Arga-Ynnakh-Khaysky massif (East Yakutia) have been revealed to contain an accessory complex of tungsten-bearing tantalum-niobates (columbite-(Fe), columbite-(Mn), tantalite-(Mn), minerals of microlite group, tantalic rutile) including «wolframoixiolite». These rocks containing wolframoixiolite, their composition and typomorphic features are described: they are highly ferriferous, with major geochemical role of niobium and wide variations of tungsten and tantalum concentrations. Wolframoixiolite occurs there in paragenesis with tungsten-bearing columbite-(Mn), tantalum-niobium ferberite, lepidolite and topaz. Wolframoixiolite of the Arga-Ynnakh-Khaysky massif was formed on a late-magmatic stage of lithium-fluoric granites crystallization by polymorphic transformation of columbite-(Fe). The study of accessory mineralization in rare-metal granites of Eurasia allows, taking into account a new find, to draw a conclusion, that wolframoixiolite is typomorphic accessory mineral in lithium-fluoric granites and may be looked as the indicator of rare-metal-granite magmatism with accompanying tin-rare-metal ore mineralization.
Marco E. Ciriotti

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