CAJ | 학술논문

磁异常图就是ΔT图,ΔT≈Xacos（D0）cos（I0）＋Yasin（D0）cos（I0）＋Zasin（I0）,其中Xa、Ya和Za是磁场的三个方向的分量,D0和I0是正常场的磁偏角和磁倾角。磁异常图界定了地壳磁化强度的横向变化。与重力异常不一样,磁异常的各种图和其极值在水平面上的投影都会对磁法数据的分析造成困难。陆地、航空和海洋的磁法测量所做的磁异常图受到磁化方向的影响很严重。之所以会观察到不同方向的磁化方向,是因为剩磁的存在磁化体感应磁化形状和方向的影响。磁变换模量（MMTs）最早是由Stavrev和Gerovska在2000年提出来的。MMTs异常更接近磁场源的水平位置,比测得的磁异常图本身更容易解释。本文介绍了Stavrev和Gerovska提出的五种MMTs转换方式,并针对Stavrev和Gerovska提出的几种评定MMTs受磁化方向影响程度的计算方式,对MMTs优缺点进行比较。同时在不同形体的MMTs异常图的基础上,分析MMTs受磁化方向影响的程度,总结和提出了哪种MMTs更为有效。
자이상도취시ΔT도,ΔT≈Xacos（D0）cos（I0）＋Yasin（D0）cos（I0）＋Zasin（I0）,기중Xa、Ya화Za시자장적삼개방향적분량,D0화I0시정상장적자편각화자경각。자이상도계정료지각자화강도적횡향변화。여중력이상불일양,자이상적각충도화기겁치재수평면상적투영도회대자법수거적분석조성곤난。륙지、항공화해양적자법측량소주적자이상도수도자화방향적영향흔엄중。지소이회관찰도불동방향적자화방향,시인위잉자적존재자화체감응자화형상화방향적영향。자변환모량（MMTs）최조시유Stavrev화Gerovska재2000년제출래적。MMTs이상경접근자장원적수평위치,비측득적자이상도본신경용역해석。본문개소료Stavrev화Gerovska제출적오충MMTs전환방식,병침대Stavrev화Gerovska제출적궤충평정MMTs수자화방향영향정도적계산방식,대MMTs우결점진행비교。동시재불동형체적MMTs이상도적기출상,분석MMTs수자화방향영향적정도,총결화제출료나충MMTs경위유효。
The magnetic anomaly maps (ΔT maps, ΔT≈Xacos(D0)cos(I0)+Yasin(D0)cos(I0)+Zasin(I0),where Xa,Ya and Za are the anomalous magnetic field component fields, and D0 and I0 are the declination and inclination of the normal field) delineate the lateral variations of magnetization in the crust. But unlike the gravity anomalies that correlate directly with the causative source bodies, the various patterns of the magnetic anomalies and the deviation of their main extrema from the horizontal projections of the bodies cause difficulties in the analysis of the magnetic data and their correlation with the source bodies. The pattern of the magnetic anomalies measured in land, marine or aeromagnetic surveys is highly sensitive to the direction of the magnetization vector of the magnetic sources. The observed variety in the direction of the magnetization vector is due to remanent magnetization, as well as the influence of the shape and the orientation of the magnetized sources on their induced magnetization. The magnitude magnetic transforms (MMTs) (Stavrev and Gerovska, 2000) produce anomalies that are closer to the magnetic-source's true horizontal position and are simpler to be interpreted than the measured anomalous field itself. This paper introduces and compares five typs of MMTs Conversion invented by Stavrev,erovska. Then , it provides different calculation methods of evaluating how MMTs or magnetic anomaly maps are influced by Direction of Magnetization , and choose the the best one.