基于L模量的磁化方向估算新方法

A New Method of Magnetization Direction Estimation Based on L-modulus

在常规的磁异常处理过程中,可以假设无剩余磁化强度,且自退磁效应可以忽略,故总磁化强度方向与当代地磁场方向一致。然而,由于剩余磁化强度的存在,总场磁化强度方向与感应磁化强度方向可以完全不一样,进而影响磁测资料的处理、反演及解释。基于此,提出L模量与化极磁异常(RTP)互相关法来估算磁化方向,理论模型及实际资料试验证明该方法相比常规的方法估计磁化角度更为准确,具有更强的实际适用性和稳定性。

In the process of conventional magnetic anomaly processing,it can be assumed that there is no residual magnetization,and the self demagnetization effect can be ignored,so the direction of the total magnetization is consistent with that of the contemporary geomagnetic field.However,due to the existence of residual magnetization,the direction of total field magnetization can be completely different from that of induced magnetization,which affects the processing,inversion and interpretation of magnetic survey data.Based on this,a method of L-modulus and magnetopolarizing anomaly(RTP)cross-correlation is proposed to estimate the magnetization direction.Theoretical model tests show that this method is more accurate than conventional methods in estimating the magnetization angle,and has stronger practical applicability and stability.