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摘要: 基于不同场源频谱成分的不同,研究松辽盆地北部布格重力异常的场源分布特征。利用匹配滤波方法计算松辽盆地北部布格重力异常的不同场源平均深度,将其分为浅源场、中源场和深源场,并推测松辽盆地北部的地壳有3层结构。浅源场产生的重力异常大,对重力勘探贡献最大;中源场和深源场的重力异常都比较小,但两者有极好的继承性。有了场源的平均深度,利用Parker迭代反演法计算上地壳与中地壳之间的界面起伏,在该界面上可看到松辽盆地北部的"隆起区-沉积盆地-隆起区"的构造特征。Abstract: Based on different spectra power of the different field source,we had studied the distribution characteristics of field source in north of Songliao Basin.In order to get the average depths of the different field source,bouguer gravity anomaly data from north of Songliao basin were calculated by the match-filter method.The bouguer anomaly can be divided into upper source field,middle source field,and lower source field,so we thought that there are three-layer crust structure in north of Songliao basin.The gravity anomalies produced by upper source field are large and make the biggest contribution to gravity prospecting. The gravity anomalies of middle source field and lower source field are both small,but they have a wonderful inheritance.After getting the average depth of field source,we also calculated the average interface depth between upper crust and middle crust by using Parker iteration inversion method,found there is 'upwelling area-sediment basin-upwelling area' tectonic characteristic at the density interface.
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[1] 臧绍先,周蕙兰,魏荣强,等.地球内部结构和物质性质的研究[J].地震学报,2003,25(5):492-502. [2] 肖鹏飞,陈生昌,孟令顺,等.高精度重力资料的密度界面反演[J].物探与化探,2007,31(1):29-33. [3] Parker R L.The rapid calculation of potential anomalies[J].Geophys JR Astr Soc,1972,37(3):447-455. [4] Oldenburg D W.The inversion and interpretation of gravity anomaliles[J].Geophysics,1974,39:526-536. [5] 陆汉鹏,张瑞敏,佟瑞清.鲁西重磁场异常变化特征的综合分析[J].华北地震科学,2012,30(3):27-33. [6] 穆石敏,申宁华,孙运生.区域地球物理数据处理方法及其应用[M].长春:吉林科学技术出版社,1990. [7] 郑洪伟,孟令顺,贺日政.青藏高原布格重力异常匹配滤波分析及其构造意义[J].中国地质,2010,37(4):995-1001. [8] 杨宝俊,唐建人,李勤学,等.松辽盆地隆起区地壳反射结构与"断开"莫霍界面[J].中国科学(D辑),2003,33(2):170-176. [9] 江为为,周立宏,肖敦清,等.东北地区重磁场与地壳结构特征[J].地球物理学进报,2006,21(3):730-738. [10] 陈均亮,蔡希源,林春华,等.松辽盆地北部断陷盆地构造特征与幕式演化[J].石油学报,1999,20(4):14-18. -

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