低磁纬度区ΔT剖面磁异常场源深度计算的切线法

THE TANGENT TECHNIQUE OF ΔT PROFILE MAGNETIC ANOMALY IN THE LOW MAGNETIC LATITUDE AREA

航磁ΔT剖面异常场源深度计算的切线法是基于中高磁纬度区建立起来的计算剖面磁异常场源深度行之有效的传统方法,以此方法为基础,明确地提出计算低磁纬度区ΔT剖面负磁异常场源深度的异常"反切"概念和做法,并从理论上证明了其正确性。通过ΔT剖面负磁异常的"反切"做法,使得传统的计算中高磁纬度区ΔT剖面磁异常场源深度的切线法及系数表可直接用于低磁纬度区,从而圆满地解决了低磁纬度区利用切线法计算ΔT剖面负磁异常场源深度的问题。

The tangent technique of ΔT profile magnetic anomaly is a kind of traditional effective method for calculating buried depths of magnetic plates in intermediatehigh magnetic latitude areas. Based on this method, the authors put forward the 'reverse tangent' technique of ΔT profile negative magnetic anomaly for calculating buried depths of magnetic plates in low magnetic latitude areas, and demonstrate its theoretic correctness. By means of such a 'reverse tangent' technique, the traditional tangent technique of ΔT profile magnetic anomaly and its coefficient tables in the intermediatehigh magnetic latitude area can be directly used to calculate the buried depth of the magnetic plate which usually produces ΔT profile negative magnetic anomaly in the low magnetic latitude area.