贝加尔地区萨彦山东部Jom-Bolok火山谷湖泊古环境研究（英文）

论文摘要

This article describes the lake basins of the Jom-Bolok volcanic region in the East Sayan（the largest manifestation of the Holocene eruptions in Central Asia）. The geomorphological position, origins, aspects of the structure and development are reviewed considering its sedimentary filling. The limnic morphogenesis here develops under the conditions of contrasting relief, high energy of neotectonic and exogenous processes. We established that Lake Khara-Nur, formed as a result of lava-damming of the Jom-Bolok river valley, emerged in its present form approximately 6500 years ago. A complex record on the environment and climatic changes, acquired from its sediments, made it possible to determine for the first time in this region the long-term trends in the development of the Middle and Late Holocene mountain geosystems and also the distinction of several paleogeographic stages of the formation of the natural environment. An average geochemical record resolution for the bottom sediments of the lake was made uniquely for the East Siberian lake records and is equal to 35 years, while the palynological record approximates 110 years.

论文目录

• 1 Introduction
• 2 Research methods
• 3 Modern physiographic conditions
• 4 General information about the lakes
• 5 Results
•   5.1 Geomorphology
•     5.1.1 The lakes of volcanic origin
•     5.1.2 The lakes of glacial origin
•     5.1.3 The lakes of fluvial origin
•     5.1.4 The lakes of the complex origin
•   5.2 Jom-Bolok volcanic environment and climate dynamics during Holocene based on complex analysis of Khara-Nur Lake sediments
•     5.2.1 Sediments
•     5.2.2 Environment and climate stages
• 6 Discussion and conclusions

文章来源

类型: 期刊论文

作者: Alexander SHCHETNIKOV,Elena V.BEZRUKOVA

来源: Journal of Geographical Sciences 2019年11期

年度: 2019

分类: 基础科学

专业: 地质学

单位: Institute of the Earth's Crust SB Russian Academy of Sciences,Vinogradov Institute of Geochemistry SB Russian Academy of Sciences,Irkutsk State University,Institute of Archaeology and Ethnography SB Russian Academy of Sciences

基金: The Ministry of Education and Science of the Russian Federation,the State Assignment No.IX.130.3.1.(0350-2016-0026),No.IX.136.2.(0346-2016-0005),Russian Science Foundation,No.16-17-10079(geomorphology,pollen and isotopic studies),Russian Foundation for Basic Research,No.16-05-00586,The Project,No.074-02-2018-334

分类号: P532

页码: 1823-1840

总页数: 18

文件大小: 34020K

下载量: 23