高精度磁测磁异常的计算与理解  

The calculation and understanding of magnetic anomaly in high-accuracy magnetic survey

作　　者：杨生[1] 郭刚[1] 

机构地区：[1]有色金属矿产地质调查中心,北京100012

出　　处：《矿产勘查》2011年第6期780-783,共4页Mineral Exploration

摘　　要：文章根据实测磁场的构成要素直接推出了测点磁异常的计算公式,和以往采用分步改正求取磁异常的方法具有相同的结果。根据矢量运算法则,导出了ΔT和异常场的关系,给出了ΔT的意义,其是磁异常在正常场方向上的分量,正负取决于异常场和正常场的夹角,锐角时为正,钝角时为负。According to the inscape of magnetic field surveyed, the author concludes the calculation formula of magnetic anomaly on the measuring point in this paper. The method mentioned above has clear thinking and clear meaning, meanwhile. It can get the same result with the usual method of correcting and obtaining magnetic anomalies step by step. On the basis of vector algorithms, it is educed the correlation between/iT and anomalous field. And ,AT is the component of magnetic anomaly in the direction of normal field. It is determined by the included angle between anomalous field and normal field, that/iT is positive or negative. When the included an- gle is less than right- angle, /iT is positive. On the contrary,AT is negative.

关 键 词：高精度磁测 正常场 异常场 

分 类 号：P631.2[天文地球—地质矿产勘探]