内蒙古河套断陷带及其邻区地壳磁性构造特征

CRUSTAL MAGNETIC STRUCTURE CHARACTERS IN HETAO RIFT ZONE AND ITS VICINITY,INNER MONGOLIA

摘要:

本文依据航磁资料和频率域磁性单界面反演方法,计算了河套断陷带及其邻区的基底磁性界面的埋深;依据三维磁性层反演方法求取了该区磁性层下界面,即居里界面的埋深;分析了磁性层上下界面的定量特征,并结合重力、地热、地形变诸方面的研究成果,讨论了该区的地壳结构特征及地震成因。

Abstract:

The buried depth of basement magnetism interface in Hetao rift zone and its adjacent area,Inner Mongolia, is calculated by using inversion method for aeromagnetic data and singlemangnetic boundary in the frequency domain. The buried depth of lower boundary of magnetic layer,i.e. Curie surface,is also calculated in terms of inversion theory for 3-D magnetic stratum.Quantitative features of the upper and tower boundaries of the magnetic stratum are analysed and the crustal structure characteristics and seismogenesis of this area are discussed based on the research results for gravity,geotherm and ground deformation.