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

IF 0.8 Q4 GEOSCIENCES, MULTIDISCIPLINARY Italian Journal of Engineering Geology and Environment Pub Date : 2023-01-01 DOI:10.26516/2541-9641.2023.3.149

I.S. Chuvashova, S.V. Rasskazov

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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.

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贝加尔湖裂谷系最新火山活动研究与年代确定的突破及其对认识亚洲最新地球动力学的意义

研究贝加尔湖裂谷系统(BRS)最新火山活动的历史和年代通常分为以下几个阶段:1)到20世纪50年代(年轻火山的发现)，2)1950 - 60年代(利用古生物资料初步确定新生代火山-沉积层序的年龄)，3)1970 - 80年代(确定地形发育中的火山地层层序和火山岩放射性同位素定年的开创性)，4)1980-2005年(亚洲火山地区年代学和地球化学资料的增长)，5)2005-2023年(年代学和地球化学资料的综合)。日本-贝加尔湖地球动力学走廊(JBGC)地幔熔融异常发育及其与印亚辐合区的重叠，是该地区最新火山活动研究和定年的突破。2018年蒙古中部地区39Ar/40Ar质量测年基本证实了2012年火山岩研究和测年的突破。

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来源期刊

Italian Journal of Engineering Geology and Environment GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

1.30

自引率

8.30%

发文量

期刊介绍： Italian Journal of Engineering Geology and Environment (IJEGE), published by Sapienza Università Editrice university press, is the open access Journal of the Research Center CERI on "Prediction, Prevention ad Control of Geological Risks" of Sapienza University of Rome. The Journal publishes original papers concerning the numerous topics of environmental risks such as seismic risk, landslide risk, hydraulic and flood risk, groundwater resource management, soil and groundwater contamination, reclamation of contaminated land, applied geophysics, economic geology, land use, soil and rock characterization. IJEGE is the Journal of the Italian Association of Engineering Geology and Environment (AIGA). The Journal is published under the auspices of the International Association for Engineering Geology and the Environment (IAEG) - Italian Group.