Native aluminium has been discovered among autigenic mineral assemblages of the Dukat silver ore field. It associates with fine grained massive aggregates of goethite, halloysite, white K-bearing mica, sylvite, halite and graphite, which fill the cavities in subvolcanic K-rhyolites. Peculiarities of this paragenesis composition and localization allow to suppose that the native aluminium could be formed as a result of decomposition of chlorides and hydrocarbones inflowed into limited space of gas originated fluids.
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