Tracing of a Potential Seismic Structure in the Taryat Basin of Central Mongolia by Volcanic Eruptions from an OIB-like Source at 50–9 Ka

Authors

I.S. Chuvashova ^1,2, S.V. Rasskazov ^1,2, T.A. Yasnygina ²,

¹Institute of the Earth's Crust SB RAS, Irkutsk, Russia

²Irkutsk State University, Irkutsk, Russia

About the Authors

Chuvashova Irina Sergeevna,

candidate of geological and mineralogical sciences,

664003 Irkutsk, st. Lenina, d. 3,

Irkutsk State University, Faculty of Geology,

assistant professor,

664033 Irkutsk, st. Lermontova, d. 128,

Institute of the Earth's Crust SB RAS,

Senior Researcher,

tel.: (3952) 51–16–59,

email: chuvashova@crust.irk.ru.

Rasskazov Sergei Vasilievich,

doctor of geological and mineralogical sciences, professor,

664003 Irkutsk, st. Lenina, 3,

Irkutsk State University, Faculty of Geology,

Head of the Department of Dynamic Geology,

664033 Irkutsk, st. Lermontova, 128,

Institute of the Earth's Crust SB RAS,

Head of the Laboratory of Isotopy and Geochronology,

tel.: (3952) 51–16–59,

email: rassk@crust.irk.ru.

Yasnygina Tatyana Alexandrovna,

candidate of geological and mineralogical sciences,

664033 Irkutsk, st. Lermontova, 128, Institute of the Earth's Crust SB RAS,

Senior Researcher,

tel.: (3952) 51–16–59,

email: ty@crust.irk.ru.

Abstract. The youngest volcanoes of Central Mongolia that erupted in the Taryat basin are described. Change of the west-east line of the Odnobokiy, Listvennichny, and Sosnovy volcanoes (age about 50 Ka) by the one of edifices of the northeastern strike of the Khorgo volcano (age about 9 Ka) is established. This change is considered as a prototype of a seismically active structure in the Chulutyn zone. From geochemical data on volcanic rocks, volcanic eruptions are argued to be from a homogeneous OIB-like source that episodically reactivated in the Taryat-Chulutyn volcanic field starting from 1.2 Ma ago. Sources of this type differ from those of the crust-mantle transition region, which are characterized by a significant spatial-temporal variability of components.

Keywords: Late Pleistocene, Holocene, basalt, basanite, Central Mongolia, Taryat basin.

P. 80–103

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For citation

Chuvashova I.S. Tracing of a Potential Seismic Structure in the Taryat Basin of Central Mongolia by Volcanic Eruptions from an OIB-like Source at 50–9 Ka [Electronic resource] / I.S. Chuvashova, S.V. Rasskazov, T.A. Yasnygina // Geology and Environment.— 2022.— V. 2, No. 4.— P. 80–103. https://doi.org/10.26516/2541-9641.2022.4.80
Access Mode: http://geoenvir.ru/archive/g&e22-2-4/chuvashova22-4.htm (30.12.2022).

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