华北地区布格重力异常的多尺度分解特征与地震活动性

被引:33
作者
方盛明
张先康
嘉世旭
段永红
杨卓欣
邱淑燕
机构
[1] 中国地震局地球物理勘探中心
关键词
小波多尺度分解; 布格重力异常; 介质密度; 地震活动; 华北地区;
D O I
10.14075/j.jgg.2002.01.008
中图分类号
P223.7 [];
学科分类号
摘要
采用小波变换多尺度分解技术 ,对华北地区布格重力异常进行分解 ,获得自地表至 Moho界面深度范围内不同尺度的密度异常体产生的重力异常。讨论了各阶变换异常细节特性及相应地质构造特征 ,认为各阶小波变换细节分别反映了地壳不同深度在一定尺度意义上的介质密度的分布特性 ,表明华北地区很多断裂 ,特别是深大断裂两侧的岩性密度确实存在着较大差异 ,记录了地壳形成演化的历史。还对该区 MS≥ 7.0以上强震震源的深部环境进行了讨论
引用
收藏
页码:34 / 39
页数:6
相关论文
共 8 条
[1]  
Research on the crustal structure and evolution of different blocks in North China rift -depression basin. Jia Shixu,Zhang Xiankang and Fang Shengming. Dixue Qianyuan Earth Science Frontiers . 2001
[2]  
Gravity field and structure of the sedimentary layer in North China. Feng Rui,Zheng Shuzhen,Huang Guifang et al. Chinese Journal of Geophysics . 1989
[3]  
Lithospheric bottom interface characteristics and seismicity in East China and its vicinity. Fang Shengming,Yu Qinfan and Zhang Xiankang. Chinese Journal of Chemical Physics . 2001
[4]  
Apparent density mapping and tectonic of China. Xu Deshu,Zeng Hualin and Wan Tianfeng. Dixue Qianyuan Earth Science Frontiers . 2001
[5]  
Singularity detection and processing with wavelets. Mallat S and Hwang W L. IEEE Transactions on Information Theory . 1992
[6]  
Discrete wavelet transform for multiple decomposition of gravity anomalies. Yang Wencai,Shi Zhiqun,Hou Zunze et al. Chinese Journal of Geophysics . 2001
[7]  
Isostatic anomalies of gravity and geologic structures of the surface and shallow crust. Yin Xiuhua,Liu Tiesheng and Liu Zhanpo. Seismology and Geophysics . 1993
[8]  
Wavelet transform and multi-scale analysis on gravity anomalies of China. Hou Zunze,Yang Wencai. Chinese Journal of Geophysics . 1997