Anyui Volcano in Chukotka: Age, structure, pecularities of rocks' composition and eruptions

The study of lavas and pyroclastics from Anyui Volcano made it possible to reconstruct succession of its eruption events. The age of the eruption is estimated by isotopic methods to be 0.248 ± 0.030 Ma. It is established that the last episode of volcanic activity in northeastern Russia occurred 0.2‒...

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Bibliographic Details
Published in:Lithology and Mineral Resources
Main Authors: Pevzner, M. M., Gertsev, D. O., Fedorov, P. I., Romanenko, F. A., Kushcheva, Y.-U. V.
Format: Other/Unknown Material
Language:unknown
Published: Zenodo 2017
Subjects:
Chukotka
Subarctic
Online Access:https://doi.org/10.1134/s0024490217010059
Description
Summary:The study of lavas and pyroclastics from Anyui Volcano made it possible to reconstruct succession of its eruption events. The age of the eruption is estimated by isotopic methods to be 0.248 ± 0.030 Ma. It is established that the last episode of volcanic activity in northeastern Russia occurred 0.2‒0.5 Ma ago (in its continental part, 0.2‒0.3 Ma ago). This episode is chronologically close to the last peak in activation of volcanism in the Arctic and Subarctic regions. The absence of features indicating glacial influence on lavas from Anyui Volcano provides grounds for an assumption that no significant glaciations took place in the continental areas of western Chukotka during the last 250 ka.

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