The Taragai Peridotite Massif as an Explosive Pipe in the Western Bureya Terrane (Southern Far East of Russia)

The Taragai peridotite massif is interpreted as an explosive ultramafic pipe that has broken through the Late Proterozoic skarnified carbonate rocks and the Early Paleozoic granites of the western Bureya Terrane. Peridotites at the surface are represented by a strongly eroded bowl-shaped structure f...

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Bibliographic Details
Published in:Doklady earth sciences 2023-09, Vol.512 (1), p.841-846
Main Authors: Berdnikov, N. V., Nevstruev, V. G., Kepezhinskas, P. K., Didenko, A. N.
Format: Article
Language:English
Subjects:
Boulders
Carbonate rocks
Carbonates
Continental margins
Copper
Disintegration
Earth and Environmental Science
Earth Sciences
Fluids
Gold
Inclusions
Magnetite
Massifs
Paleozoic
Peridotite
Petrology
Pipes
Precambrian
Rocks, Igneous
Silicates
Subduction
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Summary:The Taragai peridotite massif is interpreted as an explosive ultramafic pipe that has broken through the Late Proterozoic skarnified carbonate rocks and the Early Paleozoic granites of the western Bureya Terrane. Peridotites at the surface are represented by a strongly eroded bowl-shaped structure filled with disintegrated explosive material with abundant peridotite boulders and host rock xenoliths. The explosive character of the Taragai Massif is proved by the occurrence of magnetite, iron–carbonate–silicate (with magnetite), and Cu–Ag–Au microspherules typical of explosive eruptions. The formation of the Taragai ultramafic pipe is related to the impact of the superheated reduced fluids on the deep peridotite material of the supra-subduction wedge above the stagnant slab of the Izanagi Plate in an active continental margin setting.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X23601141