摘要
本文利用小波多尺度分解技术对位于苏鲁地区郯庐断裂带的布格重力异常资料进行了场源分离,同时结合功率谱并与地质构造环境相联系,深入研究了郯庐断裂带苏鲁段的地壳深部空间展布.研究发现在布格重力场和区域场中郯庐断裂带苏鲁段总体表现为一条明显的重力异常梯级带,而这条梯级带又具有分段性排布的特点;在局部场中反映莫霍面深度的5阶小波变换细节的重力梯度带边缘和大的构造带边界基本吻合;麦坡地震断裂带至今仍然活跃着.
In this paper, the method of wavelet multi scale decomposition was used to separate bouguer gravity anomaly data of the Tan-Lu fault zone in the Shandong Jiangsu region; combined with the power spectrum and geological structure in this area, studied deeply the spatial distribution of the deep crust in the Tan-Lu fault. The results show that the Tan-Lu fault zone in the Suiu regional show a significant overall gravity gradient zone in bouguer gravity field and regional fields. Wuxi - Suqian fault has been obvious break characteristics in the bouguer gravity field, so the Tan-Lu fault zone is divided into the Shandong section （Yi-shu fault zone） and the Jiangsu and Anhui section in accordance with bouguer gravity anomaly information, which explains the obvious points segment features of the Tan-Lu fault zone. The gravity gradient zone information of the 5 order wavelet transform, which reflected Moho depth details in the local field, consistent with large structure boundary. Maipo earthquake fault zone is still active.
出处
《地球物理学进展》
CSCD
北大核心
2012年第1期58-67,共10页
Progress in Geophysics
基金
中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(ZDJ2007-1)
"徐州市新城区开发区活断层探测与地震危险性评价"项目共同资助
关键词
小波多尺度分解
郯庐断裂带
分段性
布格重力异常
功率谱
麦坡地震断裂带
wavelet multi scale decomposition, Tan-Lu Fault Zone, segmentation, buguer gravity anomaly, power spectrum, Maipo earthquake fault zone
