| 华北地区的地壳低速层 |
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| 引用本文： | 李松林,苗琪,王旭.华北地区的地壳低速层[J].大地测量与地球动力学,2011,31(5):35-38. |
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| 作者姓名： | 李松林 苗琪 王旭 |
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| 作者单位： | 中国地震局地球物理勘探中心,郑州,450002 |
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| 基金项目： | 国家自然科学基金(90814001,40974053); 中国地震局地球物理勘探中心论著编号:RCEG201107 |
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| 摘 要： | 虽然华北地区属于克拉通类型的地质单元,然而在其地壳内部,尤其是东部地区的地壳内,低速层相当发育.这些低速层多位于上地壳底部15～25 km的深度范围内.同活动造山带内的低速层相比,华北地区的壳内低速层表现出明显不同的特点.壳内低速层水平延伸尺度不大,互相之间不太连接.同时,低速层内外速度差较小,大都小于5％.考虑到华北...
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| 关 键 词： | 华北地区 低速层 地壳结构 人工地震 热侵蚀 |
LOW VELOCITY LAYERS OF THE CRUST IN NORTH CHINA |
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| Li Songlin,Miao Qi,Wang Xu.LOW VELOCITY LAYERS OF THE CRUST IN NORTH CHINA[J].Journal of Geodesy and Geodynamics,2011,31(5):35-38. |
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| Authors: | Li Songlin Miao Qi Wang Xu |
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| Institution: | Li Songlin,Miao Qi and Wang Xu (Geophysical Exploration Center,CEA,Zhengzhou 450002) |
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| Abstract: | Although North China belongs to Craton type in geology,there exist quite a lot of low velocity layers(LVL) in its crust,especially in its eastern region.Most of these LVLs locate at the bottom of the upper crust with depth of 15-25 km.Compared with LVLs in active orogens,the LVLs in North China possess greatly different characteristics.Usually,these LVLs are not large in horizontal scale and are not connected each other.In the same time,the velocity drops are small,usually less than 5%.Considering the therm... |
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| Keywords: | North China area low velocity layer(LVL) crustal structure artificial earthquake thermal erosion |
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