[an error occurred while processing this directive] ������� 2018, 37(2) 655-664 DOI:   10.3969/j.issn.1004-5589.2018.02.033  ISSN: 1004-5589 CN: 22-1111/P

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Article by Sun S
Article by Wang P
Article by Yi J
Article by Wu C
Article by Wang H
Article by Chen H
Article by Wang W
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2. ����ʡ����ɽ��ػ�ɽ���վ, ���� ��ͼ 133600;
3. �Ͼ���ѧ �������ѧ�뼼��ϵ, �Ͼ� 210023
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Types and distribution of secondary volcanic hazards and their relationship with volcanic geology in Changbaishan-Tianchi and its adjacent areas
SUN Song1, WANG Pu-jun1, YI Jian1, WU Cheng-zhi2, WANG Han-fei3, CHEN Hai-chao1, WANG Wen-hua1
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Changbaishan-Tianchi Volcano Monitoring Station, Antu 133600, Jilin, China;
3. Department of Computer Science and Technology, Nanjing University, Nanjing 210023, China
Abstract: Based on the mapping results of volcanic geology and secondary volcanic hazards in Changbaishan-Tianchi and its adjacent areas, from the aspects of lithology, fracture, landform, geomorphology and water system, the correlation between the geological characteristics of volcanic products and the secondary volcanic hazards caused by these volcanic products is analyzed. The research shows that the rock collapses occur in the hard rock with columnar joints, as multiple volcanic eruptions and associated seismic activities denudate the loose accumulation between hard rock layers, and the rock mass loses stability and collapse. Steep slope landforms also collapse under earthquakes. The soft rocks and loose accumulation of sediment are eroded away by water and cut down by the valley, forming open sliding space in the front edge of the slope on both sides of the river, and the volcano earthquakes induce mountain deformation, which damages the slope rock mass structure and results in landslides. Fragments from early volcanic eruption and debris generated by landslides are important material sources of volcanic debris flow, while flood disasters caused by volcanic eruptions or strong earthquakes, together with landform and geomorphology, play a key role in the formation, transportation and distribution of volcanic debris flows.
Keywords: Changbaishan-Tianchi and its adjacent areas   volcanic geology   secondary volcanic hazards   correlation  
�ո����� 2018-02-02 �޻����� 2018-04-28 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2018.02.033
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