低磁纬度地区ΔT异常处理解释方法在坦桑尼亚某地区金矿预查中的应用

THE APPLICATION OF THE METHOD FOR INTERPRETATION OF MAGNETIC ΔT ANOMALIES IN THE LOW MAGNETIC LATITUDE AREA TO GOLD ORE PROGNOSIS IN TANZANIA

坦桑尼亚处于低磁纬度地区,对该地区以水平磁化为主的ΔT异常图的解释,采取对实测ΔT异常倒相180°的方法,然后用中高纬度的ΔT异常解释方法进行解释。通过在实测资料上的应用与分析,说明其解释效果与已知地质情况吻合较好。

Situated in a low magnetic latitude area, Tanzania lies in a horizontally magnetized environment. The characteristics of ΔT anomalies caused by magnetic bodies in this area differ greatly from those in the middle magnetic latitude area of China's Mainland. Based on the application and study of the measured data, the authors put forward the interpretation train of thought and a ＂ phase reversal 180°＂ interpretation method for ΔT anomalies in the low magnetic latitude area and applied approaches to the interpretation of magnetic ΔT anomalies in a mid - high latitude. The application and study of the measured data show that the effect of the interpretation is consistent fairly well with practical geological situation.