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DOI10.1016/j.jseaes.2019.01.025
Late Glacial to Holocene volcanism of Jom-Bolok Valley (East Sayan Mountains, Siberia) recorded by microtephra layers of the Lake Kaskadnoe-1 sediments
Shchetnikov, Alexander A.1,2,3; Bezrukova, Elena V.3,4,5; Krivonogov, Sergey K.6,7
发表日期2019
ISSN1367-9120
EISSN1878-5786
卷号173页码:291-303
英文摘要

This article presents first tephrochronological data on the volcanic activity in the valley of the Jom-Bolok River (East Sayan Mountains, Siberia), which is the largest manifestation of the Holocene eruptions in Central Asia. The data results from our study of the proglacial Kaskadnoe-1 Lake situated near the Jom-Bolok basalt field. The lake sediments include a series of tephra-rich layers. Radiocarbon dating of the lake sediments provided a robust age model which allowed us to build timing of eruptions formed the Jom-Bolok volcanic field. We recognize two large phases of volcanism separated by almost 5 thousand years dormant phase. The first phase is traced back to ca. 14.3 cal ka BP and lasted until 6.3 cal ka BP. Ten clusters of microtephra layers in the sediments of the first phase show 300-800 years recurrence of the volcanic events weakening upward. The event of 14.3-13.3 cal ka BP probably represents the strongest eruptions of the Jom-Bolok. The second phase started ca. 1.6 cal ka BP and highly likely continues in our days. Its strongest eruptions occurred between 1.6 and 0.8 cal ka BP with periodicity of 200 years. This tephrostratigraphy shows a multiplicity of the Jom-Bolok volcanic events and amplifies the earlier built scheme resulted from investigations of the stratified basalts, pyroclasts and lake damming events. Additionally, we indicate a possible influence of the Jom-Bolok volcanic activity on the regional and global climatic changes.


WOS研究方向Geology
来源期刊JOURNAL OF ASIAN EARTH SCIENCES
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/96455
作者单位1.RAS, SB, Inst Earths Crust, Irkutsk, Russia;
2.Irkutsk State Univ, Irkutsk, Russia;
3.RAS, SB, Irkutsk Sci Ctr, Irkutsk, Russia;
4.RAS, SB, Inst Geochem, Irkutsk, Russia;
5.Tyumen Ind Univ, Tyumen, Russia;
6.RAS, SB, Inst Geol & Mineral, Irkutsk, Russia;
7.Novosibirsk State Univ, Novosibirsk, Russia
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GB/T 7714
Shchetnikov, Alexander A.,Bezrukova, Elena V.,Krivonogov, Sergey K.. Late Glacial to Holocene volcanism of Jom-Bolok Valley (East Sayan Mountains, Siberia) recorded by microtephra layers of the Lake Kaskadnoe-1 sediments[J],2019,173:291-303.
APA Shchetnikov, Alexander A.,Bezrukova, Elena V.,&Krivonogov, Sergey K..(2019).Late Glacial to Holocene volcanism of Jom-Bolok Valley (East Sayan Mountains, Siberia) recorded by microtephra layers of the Lake Kaskadnoe-1 sediments.JOURNAL OF ASIAN EARTH SCIENCES,173,291-303.
MLA Shchetnikov, Alexander A.,et al."Late Glacial to Holocene volcanism of Jom-Bolok Valley (East Sayan Mountains, Siberia) recorded by microtephra layers of the Lake Kaskadnoe-1 sediments".JOURNAL OF ASIAN EARTH SCIENCES 173(2019):291-303.
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