【摘要】 利用遥感影像数据研究昌化—普陀断裂的构造地貌特征,通过小波多尺度方法对布格重力数据进行有效分离,并基于重力、航磁数据分析其深部结构,结合历史地震及前人人工地震资料进一步探讨该断裂的活动性。重力小波细节图表明,该断裂南倾,切穿中上地壳到达下地壳,在下地壳该断裂仍与孝丰—三门湾断裂相切;航磁场揭示该断裂具有比较强烈的活动性,推测昌化—临安段断裂是右旋走滑断裂。综合重力、航磁及前人资料可知,该断裂是杭州地区一条南倾的深大构造断裂,切穿底部基岩至下地壳,控制和影响第四纪地层沉积,至今仍具备一定的活动性和破坏性。更多还原

【Abstract】 Remote sensing image data were used to study the tectonic geomorphic feature of Changhua—Putuo fracture. Meanwhile,wavelet multiscale analytical method was applied to decomposing Bouguer gravity data,and the deep structure of Changhua—Putuo fracture was analyzed based on the gravity,aeromagnetic data. And then the activity of Changhua—Putuo fracture was further explored on the basis of the history earthquake data and the previous artificeal earthquake data. These gravity wavelet detail figures show that the fracture dips to south,cuts through the upper and middle crust to the lower crust and intersects with Xiaofeng—Sanmenwan fracture at the lower crust. The aeromagnetic field reveals that Changhua—Putuo fracture has a strong activity,Changhua—Ling’an fault segment is a right-lateral strike-slip fault. According to gravity,aeromagnetic and previous data,the fracture is a south inclining deep tectonic fracture in Hangzhou area,cuts through the bottom of bedrock to the lower crust,controls and affects the quaternary strata and still has a certain active and destructive.更多还原