| 东亚岛弧地形横剖面与板块运动 |
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| 引用本文： | 史学建.东亚岛弧地形横剖面与板块运动[J].海洋地质与第四纪地质,1997,17(4):91-99. |
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| 作者姓名： | 史学建 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所 |
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| 摘 要： | 通过对东亚岛弧横剖面形态的系统分析，并结合弧前的构造应力的分析，作者认为，东亚岛弧形成于板块东移的构造环境中，横剖面形态存在两种基本类型即内缓外陡型和内陡外缓型，这两种不同的横剖面具有不同的弧前应力，前者表现弧前挤压，后者表现弧前引张，这反映地貌形态与构造应力之间的密切关系。
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| 关 键 词： | 岛弧横剖面 构造应力 岛弧地形 板块运动 |
THE LANDFORMS OF THE ISLAND ARCS IN EAST ASIA AND PLATE MOVEMENT |
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| Shi Xuejian.THE LANDFORMS OF THE ISLAND ARCS IN EAST ASIA AND PLATE MOVEMENT[J].Marine Geology & Quaternary Geology,1997,17(4):91-99. |
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| Authors: | Shi Xuejian |
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| Abstract: | According to study about the patterns and cross sections of island arcs in East Asia and with discussion on forearc stress,the author suggested that the island arcs were formed in the condition of eastbound plate movement.The island arcs always show convex toward east(sea).The cross sections can be classed into two types.One is gentle on landward side but steep on seaward side.The other,on the contrary,is steep landward and gentle seaward.There is a significant difference in stress state between the two types.The former shows compression in forearc area and the latter shows tension.This indicates close relationship between landform and stress.The spatial distribution of the types shows that the east margin of Asia continent is spreading toward the ocean and the island arcs move eastwards with it,rather than the Pacific plate puts compression on the Asia plate. |
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| Keywords: | landform of island arc forearc structure stress island arc eastbound movement East Asia |
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