UDC 552.3:551.14 + 550.93(51)

Breakthrough in Research and Dating of Latest Volcanism in the Baikal Rift System and its Significance for Understanding Latest Geodynamics of Asia


I.S.Chuvashova1,2, S.V. Rasskazov 1,2

1Irkutsk State University, Irkutsk, Russia

2Institute of the Earth's Crust SB RAS, Irkutsk, Russia

About the Authors

Chuvashova Irina Sergeevna,

candidate of geological and mineralogical sciences,

664003 Irkutsk, Lenin str., 3,

Irkutsk State University, Faculty of Geology,

Associate Professor of the Dynamic Geology chair,

664033 Irkutsk, Lermontov str., 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, Lenin str., 3,

Irkutsk State University, Faculty of Geology,

Head of Dynamic Geology Chair,

664033 Irkutsk, Lermontov str., 128,

Institute of the Earth's Crust SB RAS,

Head of the Laboratory for Isotopic and Geochronological Studies

tel.: (3952) 51–16–59,

email: rassk@crust.irk.ru.

Abstract. The history of studying and dating the latest volcanism of the Baikal Rift System (BRS) is conventionally divided into stages: 1) until the 1950s (discovery of young volcanoes), 2) 1950–1960s (primary determination of the age of the Cenozoic volcanogenic-sedimentary sequences using paleontological data), 3) 1970–1980s (determination of sequence of volcanic strata in the development of relief and pioneering radioisotope dating of volcanic rocks), 4) 1980–2005 (growth of geochronological and geochemical data on volcanic areas of Asia), and 5) 2005–2023 (synthesis of geochronological and geochemical data). The breakthrough in studying and dating of latest volcanism in the BRS resulted in substantiation of the development of mantle melting anomalies in the Japan–Baikal Geodynamic Corridor (JBGC) and its overlap by the Indo-Asian Convergence Region. A breakthrough in studying and dating of volcanic rocks that occurred by 2012 was basically confirmed by mass 39Ar/40Ar dating of 2018 in Central Mongolia.

Keywords: Cenozoic, recent geodynamic stage, Baikal Rift System, Asia, volcanism, K–Ar method, 39Ar/40Ar method, 14C method, U–Th method.

P. 149–197


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For citation

Chuvashova I.S., Rasskazov S.V. Breakthrough in Research and Dating of Latest Volcanism in the Baikal Rift System and its Significance for Understanding Latest Geodynamics of Asia / I.S. Chuvashova, S.V. Rasskazov // Geology and Environment : electronic scientific journal. 2023. V. 3, No. 3. P. 149–197.DOI 10.26516/2541-9641.2023.3.149.

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