| 台湾海峡地区横向构造及其对东南沿海地震的作用 |
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| 引用本文： | 沈金瑞,许世远,傅文杰.台湾海峡地区横向构造及其对东南沿海地震的作用[J].大地构造与成矿学,2009,33(4). |
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| 作者姓名： | 沈金瑞 许世远 傅文杰 |
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| 作者单位： | 1. 莆田学院,环境与生命科学系,福建,莆田,351100
2. 华东师范大学,资源与环境科学学院,上海,200062 |
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| 基金项目： | 国家自然科学基金项目，福建省自然科学基金项目，莆田市科技局项目 |
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| 摘 要： | 台湾海峡两岸存在一系列断续分布、横贯台湾海峡的NW向断裂,研究表明为一系列具有走滑运动的横向构造,根据地壳运动、区域变形和断裂特征分为巴士断裂带、台中-晋江断裂带和宁德-三貂角断裂带。中部的台中-晋江断裂带是一条控制地壳运动南北差异的重要分界断裂,断裂带以北的东南沿海北部和台湾北部地壳整体向东运动,与琉球俯冲带右行走滑运动方向基本相同,形成一致的变形取向;断裂带以南处于华南地块与菲律宾海板块相向运动挤压变形环境,地壳变形比北部强烈。东南沿海地震强度增强趋势、地震南强北弱与该应变场和横向走滑有关:(1)由于该断裂以南比以北地区应力应变场变化大,多场耦合复杂,耦合程度降低,造成蠕动变形不均产生应力闭锁,孕育地震发生。(2)福建东部比台湾海峡地壳均一性差、地球物理场变化明显,组成更为复杂的多元、多场耦合,耦合场稳定性差,容易受横向构造活动干扰,产生弹性变形而孕育地震强度增强。
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| 关 键 词： | 地震 横向构造 构造藕合作用 台湾海峡 东南沿海 |
Transverse Structure of Taiwan Strait Area and Its Effect on the Earthquakes of Southeast Coastal Regions |
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| SHEN Jinrui,XU Shiyuan,FU Wenjie.Transverse Structure of Taiwan Strait Area and Its Effect on the Earthquakes of Southeast Coastal Regions[J].Geotectonica et Metallogenia,2009,33(4). |
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| Authors: | SHEN Jinrui XU Shiyuan FU Wenjie |
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| Institution: | SHEN Jinrui1,XU Shiyuan2 , FU Wenjie1 (1.Department of Environment , Life Sciences,Putian University,Putian 351100,Fujian,China,2.School of Resources , Environment Science,East China Normal University,Shanghai 200062,China) |
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| Abstract: | There are a series of NW-trending faults along the Taiwan Strait. Studies show that a series of transverse structures with strike-slip movements could be divided into three types according to the crustal movement,region deformation and fracture characteristic. The three types are the Bashi,Taizhong-Jingjiang and Ningde-Sandiaojiao fault zones respectively. The middle Taizhong-Jingjiang faulted zone is an important boundary which controls the different crustal movements between the north and the south. The w... |
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| Keywords: | Taiwan Strait coastal Southeast China seismicity transverse structure structural coupling |
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