【摘要】 利用对应分析约束下的重磁联合反演方法，计算了南北带北段４条地震测深剖面的地壳上地幔的密度和磁化率物性参数。结果表明：①自上而下区内存在中新生界地层与下伏地层（０．１４～０．３０ｇ／ｃｍ３）、中上地壳与下地壳（０．１０～０．２０ｇ／ｃｍ３）和下地壳与上地幔顶部之间（０．３０～０．４０ｇ／ｃｍ３）３个密度分界面；②区内磁性参数随深度增加而增大，浅部中新生界地层几乎无磁性，中上地壳磁化率一般为１００～１５０００×１０－６ＩＳ；下地壳磁性层磁化率明显升高，一般为１５０００～２００００×１０－６ＩＳ；③区内地壳各构造层的密度和磁化率存在明显的横向变化，其分区特征与大地构造分区基本一致。更多还原

【Abstract】 In this paper, with the method of gravity-magnetic simultaneous inversion under constraint of correspondence analysis,the density and magnetic susceptibility of the crust and upper-mantle about four seismic sounding profiles in the northern part of south-north earthquake zone are calculated.The results show that:(1)There are three density interfaces from upper to lower.They are the interface between Mesozoic-Cenozoic erathem and lower layer(0.14～0.30g/cm 3),central-upper crust and lower crust (0.10～0.20g/cm 3),and lower crust and upper mantle (0.30～0.40g/cm 3).(2)The magnetic parameter increases with depth in study area.In strata of Mesozoic-Cenozoic,it is unmagnetism almost.The susceptibility is usually (100～1500)×10 -6 IS in central upper crust,and (15000～20000)×10 -6 IS in the lower crust.(3)The distribution characters of the density and magnetic intensity are correspondent with the structure in study area.更多还原