利用遥感、重磁数据研究昌化-普陀断裂的空间展布特征

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。

TheSspace distribution characteristics research of Changhua-Putuo Fracture based on remote sensing,Sgravity and magneticSdata

In this paper, remote sensing image data were used to study the tectonicSgeomorphicSfeature of Changhua-Putuo fracture. Meanwhile,SwaveletSmultiscaleSanalyticalSmethodSwasSappliedStoSdecomposingSBouguer gravitySdata, and theSdeep structure of Changhua-Putuo fracture wasSanalyzed based on theSgravity,SaeromagneticSdata. And thenStheSactivity of Changhua-Putuo fracture was further explored onStheSbasisSof the history earthquakeSdata and the previousSartificeal earthquake data.SThese gravitySwavelet detailSfigures show thatStheSfractureSdips to south, cuts through theSupper and middle crust toSthe lower crust and intersectsSwith Xiaofeng-Sanmenwan fracture at theSlower crust. The aeromagnetic fieldSrevealsSthatChanghua-PutuoSfracture has a strong activity, Changhua-Ling"anSfaultSsegmentSis aSright-lateral strike-slip fault. SAccording toSgravity,SaeromagneticSandSprevious data, the fractureSisSaSsouthSincliningSdeepStectonic fracture in Hangzhou area,Scuts through theSbottom ofSbedrockStoSthe lower crust, controls and affects the quaternary strata and still has a certain active and destructive.