【摘要】 笔者提出了一种改进的Parker--Oldenburg界面反演方法,通过引入纵向磁化率变化和双界面模型约束反演算法,同时采用新的迭代算法来确保迭代收敛性和稳定性。通过理论模型对比测试,验证了本文方法相比于常规Parker--Oldenburg方法具有更高的反演精度。利用松辽盆地区域航磁数据,应用本文方法反演获得松辽盆地居里面深度为18～25 km,在松辽盆地中北部具有明显的居里面隆起,与区域地温梯度分布和地质构造分布有很好的一致性,论证了松辽盆地后期深部构造活动对前期深部构造形态的继承和改造,并揭示了松辽盆地地热开发远景区分布。更多还原

【Abstract】 A improved Parker-Oldenburg algorithm has been proposed. The authors introduce the variable susceptibility factor and dual magnetic interface model to constrain the Parker--Oldenburg algorithm. Meanwhile,a new iterative algorithm is used to ensure the stability of iterative convergence. The comparison test of the theoretical models proves that the proposed method has higher inversion accuracy than the conventional Parker-Oldenburg method. Based on the aeromagnetic data of Songliao Basin,the Curie depth of Songliao Basin is 18 ～ 25 km obtained by using the method described in this paper. There exists an obvious Curie uplift in mid-northern Songliao Basin,which is consistent with the regional geothermal gradient and geological structure distribution. Above all,the late deep tectonic activity in Songliao Basin has inheritance and transformation from the early deep tectonic morphology,which revealed the important development prospect of geothermal in Songliao Basin.更多还原